Table of Contents
SIYI HM30 User Manual
INTRODUCTION
Product Features
30KM 1080P Full HD Image Transmission
SIYI HM30 applies SIYI’s brand new and cutting edge high-definition image transmission technology with the ability to transmit 1080p 60fps video stream at *150ms low latency. The technology comes with a smart feature to adapt its transmission to better frequency bands, which means it always goes to work on the band with least interference. With the standard omni directional antennas, HM30’s effective range can reach up to 15 kilometers. With the long-range antennas, the range can be up to 30 kilometers with full HD image transmission, real-time telemetry, and stable control.
*The 150ms latency is an average result measured by using SIYI standard IP camera under the following conditions:
H.265 format, 720p @ 30 fps, displayed in QGC v4.1 (low-latency mode): end-to-end latency is between 130 and 180ms.
H.265 format, 1080p @ 30 fps, displayed in QGC v4.1 (low-latency mode): end-to-end latency is between 180 and 250ms.
SIYI will release a new 1080p @ 60fps camera to effectively lower latency even more.
OSD Telemetry Display
Working with HM30, SIYI FPV app supports Mavlink telemetry overlayed with OSD display. The OSD display information can be customized. FPV OSD with full HD image will bring you endless fun.
Network Relay, Dual Remote Control
HM30 will support Dual RC function, under which two ground units can bind to one air unit to control flight and payloads at the same time. RC Relay function expands the communication range for HM30.
*The features are in development and will come soon.
OLED Touchscreen Display and Configuration
The OLED touchscreen on HM30 ground unit displays its working status in real-time and supports fast parameter configuration. Much more convenience for outdoor flights!
Quick Release Battery, PD Fast Charging
Power supply to HM30 ground unit uses fast-release structure design for popular battery models such as NP-F550/570/950 series. Max 30W PD fast charging can be used to charge the battery through the transmitter.
You can use a 7 to 16.8 V external power for HM30 ground unit through its XT30 connector.
Parts
At a Glance
Button/Switch Types and Default Channel Definitions
HM30 supports up to 16 communication channels in total. Channel 10 to 14 are mapped with PWM 1 to 5 in default.
Ports on HM30 Ground Unit
Ports on HM30 Air Unit
OLED Function Display
Technical Specification
Overall
Max Transmission Distance | 30 km (Unobstructed, free of interference) |
Channels | 16 communication channels |
Datalink Supported FC | Open-Source FC Pixhawk or APM SN+, SN-NAVI MATEK H743 / F405 Or any other flight controllers with UART datalink output |
FPV Supported GCS (Standard RTSP stream) | QGroundControl SIYI FPV |
Ground Unit
Monitor Display |
0.96-inch OLED Screen |
Dimension | 189 x 138 x 41 mm (Antenna and battery excluded) |
Weight | 132 g (Antenna and battery excluded) |
Supported Battery Type | NP-F550 / F750 / F770 / F950 / F970 series fast-release batteries (HM30 Fly More Combo comes with NP-F750 battery) |
Fast Charging Protocol | PD 30 W |
Antenna Gain | Standard Omni Antenna: 5 dBi Standard Directional Antenna: 11 dBi |
Power Consumption | 5 W |
Interface & Ports | S.Bus / PPM RC Signal Input: RC (GH1.25 4-pin) Datalink Output: UART (GH1.25 4-pin) Ethernet Port: LAN (GH1.25 4-pin) Power Output: VCC (GH1.25 4-pin) USB Video Output / Charging / Firmware Upgrade / USB WiFi: Type-C Power Input: PWR (XT30) Tripod Connector: 1/4-inch screw hole |
Waterproof Level | IP53 |
Working Temperature | -10℃ ~ 50℃ |
Air Unit
Signal Output | 16 channels of SBUS 5 channels of PWM |
Interface & Ports | S.BUS: 3-Pin Datalink (to FC): UART (GH1.25 4-Pin) PWM Channel 1-5: 6-Pin Video Input: 8-Pin Firmware Upgrade: Type-C |
Dimension (Antenna excluded) | 70 x 55 x 16 mm (Fan included) |
Weight (Antenna excluded) | 74 g |
Antenna Gain | Standard Omni Antenna: 5 dBi |
Power Input | 11 ~ 16.8 V (Expandable to 14 ~ 58.8 V with BEC) |
Working Temperature | -10℃ ~ 50℃ |
FPV Camera
Max Resolution | 720p 30fps 1.57Mbps H.265 (Or 1080p 30fps 2.3Mbps H.265 only as the reference to DIY configuration) |
Sensor | 1/2.9” CMOS |
Effective Pixel | 300 Mp |
Lens | 3.2 mm, f/2.8 |
Camera Angle | FOV 120° |
Dimension | 42 x 42 x 25 mm |
Weight | 23 g |
Cable Length | 1000 mm |
Working Temperature | -10℃ ~ 55℃ |
Ground Unit HDMI Output Module
HDMI Port Type | Standard HDMI Port |
Power Consumption | 2.5 W |
Dimension | 52 x 52 x 16 mm |
Weight | 150 g |
Working Temperature | -10℃ ~ 55℃ |
Packing List
FPV Combo | Fly More Combo |
1 x HM30 Ground Unit 2 x Standard Omni Antenna 2 x Directional Antenna | |
1 x HM30 Air Unit
2 x Standard Omni Antenna | |
1 x Ground Unit S.Bus Signal Cable 1 x Ground Unit RJ45 Video Cable 1 x Ground Unit XT30 Male Power Cable | |
1 x PIX Telemetry Cable 1 x Air Unit Signal Cable 1 x PWM Cable | |
1 x Type-C to Type-C Charging Cable 1 x Type-C to USB-A Converter 1 x Type-C to Micro-USB Cable | |
1 x IP Camera | |
| 1 x 20W PD Charger
1 x NP-F750 2S Chargeable Battery |
Ground Unit HDMI Output Module
Indicator Definition
The status indicators on HM30 ground unit and HM30 air unit use three different colors and different blinking frequencies to indicate the system’s working or abnormal status.
Ground Unit Indicator
Fast Red Blinks: Ground unit is binding to air unit.
Solid Red: No communication between ground unit and air unit.
Slow Red Blinks: RF firmware does not match.
Triple Red Blinks: FPV initialization failed.
Fast Red-Yellow Blinks: FPV firmware does not match.
Slow Red-Blue-Yellow Blinks: FPV is starting.
Fast Red-Blue-Yellow Blinks: Firmware updating.
Fast Yellow Blinks: Power input voltage is out of range.
Slow Yellow Blinks: Ground unit FPV data overload alert, level two.
Triple Yellow Blinks: Ground unit FPV data overload alert, level one.
Double Yellow Blinks: Ground unit Bluetooth is not identified.
Yellow-Red Blinks: Ground unit overheat alert, level one.
Yellow-Red-Red Blinks: Ground unit overheat alert, level two.
Yellow-Red Blinks: Ground unit overheat alert, level three.
Solid Blue: Perfect communication, receiving 100% data package.
Blue Blinks: Blinking frequency indicates the system’s signal quality. More frequently it blinks, worse the signal quality is.
Slow Blue Blinks: Receiving 95% to 99% data package.
Blue Blinks (every 3/5 second): Receiving 50% to 75% data package.
Blue Blinks (every 3/10 second): Receiving 25% to 50% data package.
Blue Blinks (every 1/25 second): Receiving less than 25% data package.
Double Blue Blinks: Failsafe set successfully.
Blue-Red Blinks: Air unit overheat alert, level one.
Blue-Red Blinks: Air unit overheat alert, level two.
Blue-Red Blinks: Air unit overheat alert, level three.
Air Unit Indicator
Solid Red: No communication between transmitter and receiver.
Fast Red Blinks: Ground unit is binding to air unit.
Slow Red Blinks: RF Firmware does not match.
Triple Red Blinks: FPV initialization failed.
Slow Red-Blue-Yellow Blinks: FPV is starting.
Fast Red-Blue-Yellow Blinks: Firmware updating.
Yellow Blinks: Air unit low voltage alert (voltage input lower than 12V).
Solid Blue: Perfect communication, 100% data package received.
Blue Blinks: Blinking speed indicates the system’s signal strength. More frequently it blinks, worse the signal quality is.
Slow Blue Blinks: 95% to 99% data package received.
Blue Blinks (every 3/5 second): 50% to 75% data package received.
Blue Blinks (every 3/10 second): 25% to 50% data package received.
Green Blinks (every 1/25 second): less than 25% data package received.
Fast Blue-Red Blinks: Air unit starts to bind wirelessly (plug power three times to trigger).
Blue-Red Blinks: Air unit overheat alert, level one.
Blue-Red-Red Blinks: Air unit overheat alert, level two.
Blue-Red-Red-Red Blinks: Air unit overheat alert, level three.
GET READY TO USE HM30
Ground Unit
Power On/Off
Power On: Short press and long press combo. When HM30 ground unit is off power, press the power button once, the OLED screen will display “press again”. Then immediately press and hold the power button for about two seconds, ground unit starts working.
Power Off: Long press. When HM30 ground unit is working, press the power button once, the OLED screen will display “press again”. Then immediately press and hold the power button for about two seconds, ground unit will be turned off.
Charging
When HM30 ground unit is mounted the external NP-F750 series chargeable battery and the ground unit is power off, you can charge the battery through HM30 ground unit using the original PD fast charger.
- Connect HM30 ground unit to the PD charger with the original Type-C fast charging cable and plug into power.
- If the charging indicator is on red, the ground unit is charging.
- If the charging indicator is on green, charging is finished.
CAUTION
HM30 ground unit cannot be charged when it is working. Please do power off the ground unit before charging.
NP-F550 / F-750 / F-950 fast-release battery series are suggested to work with HM30 ground unit.
Charging Indicator
Solid Red: In charging.
Solid Green: Charging finished.
Important Instructions on Promotion to HM30 Communication Range and Video Fluency
In order to have the best communication range and video fluency with the HM30 system, please carefully read the below tips for choosing/mounting antenna and module configuration.
Precautions on using HM30
- There are four ways to acquire the video stream from HM30 ground unit: USB, Internal Wi-Fi, USB Wi-Fi, and Ethernet.
- When the environmental temperature is high or there is direct sunshine, it is suggested not to use the Internal Wi-Fi for video sharing to reduce internal heat.
- It is also suggested not to run SIYI FPV and QGroundControl at the same time, not even running one at backstage, as it still occupies bandwidth thereby lower the communication range.
- Only power battery and the SIYI original BEC are allowed to power the XT30 connectors on HM30 ground unit and the air unit directly. HD image transmission requires high standard to the current level, the instance of the current response, and the current ripple, so power supply from the third-party BEC or from FC may interfere the link stability and the image transmission range.
- When you use a mobile device to connect with HM30 ground unit’s internal Wi-Fi for video display, mind that the distance between your mobile device and the ground unit should be within one meter. If you expect for longer distance to connect the mobile device, please use the USB Wi-Fi modules selling by SIYI with optional transmitting power.
- It will cause video freeze or extra latency when the battery level of your mobile device is low or its temperature is high, because the decoding speed is lower in such circumstances.
Groud Unit Antenna Choice and Wireless Mode
0 to 10 Kilometers FPV Flight, Two standard omnidirectional antennas on HM30 ground unit. Wireless mode: 5 to 8 km low latency. Omni antenna signal is the worst on top direction, please fly within 100-meter distance from home point.
10 to 20 Kilometers GCS Flight, Two standard directional antennas on HM30 ground unit. Wireless mode: 24 km long range. Route flight through GCS is suggested as the antenna is directional. Antenna is directional. Your drone must fly in front of your antenna and should not fly in the opposite direction or fly top.
20 to 30 Kilometers GCS Flight, High gain antenna (17 to 20 dBi) on HM30 ground unit. Wireless mode: 24 km long range. Route flight through GCS is suggested as the antenna is directional.
40 Kilometers GCS Flight, *For professional users only High gain antenna (17+ dBi) on HM30 ground unit. Wireless mode: 40 km long range. This is not the mode for everyone. Please do not try to use it. Without high gain antennas, the signal quality could be bad, and the video stream could freeze occasionally!
Air Unit Antenna Choice
Only the standard omni antenna is suggested for HM30 air unit. Quantity is two pieces.
For small planes or who worries about the signal from the top, and who does not care about the very long range, welcome to use the SIYI original lollipop antenna.
How to Mount the Standard Antenna on HM30 Ground Unit
- The SMA connector should be screwed tightly.
- The antenna should stand vertically, and its flat side should always point to your aircraft or vehicle.
- Do not cross the two antennas.
- The two antennas should be amounted apart from each other for about 10 cm distance, at least 5 cm, to ensure that they transmit and receive signals well.
How to Mount the Long-Range Antenna on HM30 Ground Unit
- The SMA connector should be screwed tightly.
- The panel side should always point to your aircraft or vehicle.
- Please make its short side in horizontal directional and its long side in vertical direction. On the air unit, the antenna top should be in vertical direction and point to the ground.
- Please be very careful with the antenna cable’s SMA connector and its solder point. Do not drag it or bend it in case of any damage. To adjust the position of the antenna, always try to bend the middle part of the antenna cable.
- The two antennas should be amounted apart from each other for about 10 cm distance, at least 5 cm, to ensure that they transmit and receive signals well.
How to Place HM30 Air Unit Antenna
- The SMA connector should be screwed tightly.
- On a quadcopter, the air unit antenna should be hanged vertically from the carbon fiber board or the arms with the head pointing downward, and its flat side should always point to the ground unit in most flight altitudes.
- On a plane, the antenna can stand vertically from the wings.
- The antenna cable should be placed far away from E.S.C and motors, or some other equipment with heavy current or interference. The antenna cable should not cross.
- The antenna body or the SMA connector should not touch the metal/carbon-fiber parts directly. At least 10 mm distance should be reserved.
- The two antennas should be mounted apart from each other for at least 5 cm distance. And try the best to avoid any kind of obstruction during flight.
- Please be very careful with the antenna cable’s SMA connector and its solder point. Do not drag it or bend it in case of any damage. To adjust the position of the antenna, always try to bend the middle part of the antenna cable.
Transmitting Angle of the Standard Omni Antenna
Air Unit Antenna Installation on Quadcotpers
MENUS
Users can configure HM30 ground unit in the built-in OLED screen.
Mark
This chapter was made according to HM30 ground unit firmware version 0.1.7.
Settings
Basic functions of the HM30 ground unit.
About Settings
Rec. No (Air Unit No.): Display the number of the currently bound air unit. (In development)
Bind: Binding button.
RC Mode: Display the current RC signal input mode on HM30 ground unit.
Datalink Mode: Display the current datalink output mode on HM30 ground unit.
Baud: Datalink communication baud rate.
AAT. Baud: Antenna tracker communication baud rate.
FailsafeSet (Failsafe Settings): Set failsafe function on HM30 ground unit.
RSSI CH (RSSI Channel): Set the RSSI output channel on HM30 ground unit.
Wireless Mode: Set the wireless mode for HM30 system.
Video Mode: Set the video output mode on HM30 ground unit.
Air Unit Number
HM30 ground unit will be capable to bind multiple air units. The function is still in development.
Bind
Please follow the below steps to bind HM30 ground unit and HM30 air unit.
- Press “+” and “-” buttons to move the cursor to “Bind” and press the “Enter” button.
- The ground unit status indicator starts to blink red fast. And “bind” turns to “binding”.
- Then press the binding button on the air unit for two seconds. The air unit status indicator starts to blink red fast as well.
- Then please wait for 5 to 10 seconds till the status indicators on HM30 ground unit and air unit turn to solid blue. Binding is finished.
RC Signal Input Mode
HM30 supports three RC signal input modes. S.Bus, PPM, and UART.
Press “+” and “-” buttons to move the cursor to the current RC signal input mode and press the “Enter” button.
The OLED screen will alert, “Do not configure (this function) in flight in case of losing control!”
Press the “Enter” button again to go to the submenu of “RC Mode”.
Move the cursor to select your target RC signal input mode.
Back to the “Settings” page, if there is the “x” icon after the selected mode, it means there is no RC signal input. If the icon is “←→ ”, thee is RC signal input through the current mode.
Datalink Output Mode
HM30 ground unit supports four ways to output datalink stream. Bluetooth, Type-C, UART serial port, and UDP.
About Datalink Output Mode
Blue: Datalink output through Bluetooth.
Type-C: Datalink output through theType-C port on HM30 ground unit.
UART: Datalink output through the UART port on HM30 ground unit.
UDP: Datalink output through UDP network.
Press “+” and “-” buttons to move the cursor to the current datalink output mode and press the “Enter” button.
The OLED screen will alert “Do not configure (this function) in flight in case of losing control!”
Press the “Enter” button again to go to the submenu of “Datalink Mode”.
Move the cursor to select your target datalink output mode.
Mark
When the datalink output mode is Bluetooth, UDP, or Type-C, the UART serial port on HM30 ground unit will output only downloading data for AAT function. When the datalink output mode is UART, the port will have both uploading and downloading data.
For more detail about datalink output, please refer to the Chapter 4 “Datalink” in this user manual.
Datalink Baud Rate
HM30 supports different baud rates for datalink communication. The available baud rates are 9600, 38400, 57600, 115200, and 230400.
Press “+” and “-” buttons to move the cursor to the current datalink baud rate and press the “Enter” button.
The OLED screen will alert “Configure (this function) in communication with the air unit!”
Press the “Enter” button again to go to the submenu of “Datalink Baud Rate”.
Move the cursor to select your target datalink baud rate.
Mark
When the datalink output mode is UART, changing the datalink baud rate will change the baud rate of the UART port on HM30 ground unit and HM30 air unit.
AAT Baud Rate
HM30 supports two baud rates for AAT communication. 57600 and 115200.
Press “+” and “-” buttons to move the cursor to the current AAT baud rate and press the “Enter” button to switch.
Every time the “Enter” button is pressed, the AAT baud rate will be switched between 57600 and 115200.
Mark
When the datalink output mode is UART, the configuration will not take effect.
When the datalink output mode is Bluetooth, Type-C, or UDP, the configuration will take effect.
Fail-Safe
HM30 supports configuring Failsafe function with the remote controller.
Press “+” and “-” buttons to move the cursor to the second page of the “Settings” menu.
Then go to “Set” after “FailsafeSet” and press the “Enter” button.
The OLED screen will alert “Configure (this function) in communication with the air unit!” and “Need to connect (HM30 ground unit) with remote controller!”.
Press the “Enter” button again, HM30 ground unit will read the channel output value from the current RC signal and set it as the failsafe channel value.
Mark
When the HM30 ground unit was not in communication with the air unit, the function will not take effect.
When the HM30 ground unit was not connected with the remote controller, the function will not take effect.
30KM 1080P Full HD Image Transmission
RSSI Channel
HM30 supports customizing the RSSI output channel.
The “OFF” value after “RSSI CH” indicates that the RSSI channel output is disabled. If the value is a number, it indicates the current RSSI output channel.
Press “+” and “-” buttons to move the cursor to the RSSI channel value and press “Enter” button to switch channels.
Mark
The available RSSI output channels on HM30 are from communication channel 5 to channel 16.
Wireless Mode
HM30 supports switching wireless mode to be compatible with antennas in different types and gains and to reach the best communication performance and the longest range.
About Wireless Mode
5KM. FPV. LowLatency: 5-kilometer low latency FPV flight mode.
8KM. FPV. LowLatency: 8-kilometer low latency FPV flight mode.
24KM. GCS: 24-kilometer GCS long range mode.
42KM. GCS: 42-kilometer GCS long range mode.
Press “+” and “-” buttons to move the cursor to the second page of the “Settings” menu.
Then go to “Wireless Mode” and press the “Enter” button.
The OLED screen will alert “Do not configure (this function) in flight in case of losing control!” and “Configure (this function) in communication with the air unit!”.
Press the “Enter” button again to go to the submenu of “Wireless Mode”.
Select your required wireless mode and press the “Enter” button to confirm.
Mark
Please carefully read the Chapter 2.2 “Important Precautions on Promotion to HM30 Communication Range” in this manual before using this function.
Video Output Mode
HM30 supports four ways to output video stream. Internal WiFi, USB WiFi, Type-C Port and LAN port.
About Video Output Mode
Inter Wi-Fi / Upgrade: Video output through internal Wi-Fi module in HM30 ground unit or the HM30 ground unit is under firmware upgrade process through the Type-C port.
USB: Video output through the Type-C port on HM30 ground unit.
Type-C Wi-Fi: Video output through an external USB Wi-Fi module connected to the Type-C port on HM30 ground unit.
Press the “+” and the “-” buttons to move the cursor to the video output mode, and press the “Enter” button.
The OLED screen will alert, “Do not configure (this function) in flight in case of losing control!”
Press the “Enter” button again to go to the submenu of “Video Mode”.
Move the cursor to select your target video output mode.
Mark
For more detail on outputting video stream, please refer to the Chapter 6 “Image Transmission” in this manual.
Image Transmission and WiFi Status
Through “Image Transmission and WiFi Status” we can have a general view to the communication status of the image transmission link and the WiFi link.
Image Transmission Status
About Image Transmission Status
CH: The current communication channel.
Signal: Image transmission signal quality (in percentage, from 0 to 100).
RSSI: Image transmission signal strength (in dBm).
Ntime: Communication latency of the image transmission link. The latency time will accumulate when the link loses communication.
Up B: Uploading bandwidth.
Down B: Downloading bandwidth.
Up Data: Uploading data.
Down Data: Downloading data.
WiFi Status
About WiFi Status
CH: The current communication channel.
Signal: WiFi signal quality (in percentage, from 0 to 100).
RSSI: WiFi signal strength (in dBm).
Ntime: Communication latency of the WiFi link. The latency time will accumulate when the link loses communication.
Up B: Uploading bandwidth.
Down B: Downloading bandwidth.
Up Data: Uploading data.
Down Data: Downloading data.
Datalink and Remote-Control Status
Through “Datalink and Remote-Control Status” we can have a general view to the communication status of the Datalink and Remote-Control link.
About Datalink and Remote-Control Status
Frequency: The current communication frequency band.
Valid Pack: Valid package.
Pack Rate: Valid package rate (in percentage).
Data Up: Uploading data.
Data Down: Downloading data.
Device Information
Through “Device Information” we can have a general view to the hardware and the software information of HM30 system.
About Device Information
Hard ID: Item ID of the HM30 hardware.
Firmware Ver.: RF firmware version of HM30 ground unit.
Sky Firmware Ver.: RF firmware version of HM30 air unit.
Video Ver.: FPV firmware version of HM30 ground unit.
Sky Video Ver.: FPV firmware version of HM30 air unit.
Loader Ver.: Boot loader version of HM30 ground unit.
Mavlink Information
The Mavlink information is for reference only.
DATALINK
Datalink is one of the core features of most SIYI radio systems.
HM30 ground unit supports communication with different ground control software through various hardware interfaces.
Communication with GCS via Bluetooth
Let’s take QGroundControl as an example.
On HM30 ground unit, go to “Settings” and set “Bluetooth” for “Datalink Mode”, and configure the correct baud rate.
On your mobile device or your laptop, turn on Bluetooth and search the Bluetooth device starting with the ID “SIYI-6A********”), and pair. The PIN code is “1234”.
Open QGC, go to “Application Settings – Comm Links” and “Add” a new connection.
Set the “Type” as “Bluetooth”, then touch “Scan”.
Select the Bluetooth device starting with the ID “SIYI-6A********”, then “OK” to go back to the “Comm Links” page
Select “Bluetooth” and touch “Connect”, Bluetooth connection is established.
Mark
If it is your first time to add a new connection in QGC “Comm Links”, please do not check the option “Automatically Connect on Start”. It can be checked later when you confirm that the datalink is connected successfully.
Communication with GCS through UDP
Let’s take QGroundControl as an example.
On HM30 ground unit, go to “Settings” and set “UDP” for “Datalink Mode”, and configure the correct baud rate.
UDP connection uses fixed IP for network communication, please set the IP address for your connected mobile device or Windows device as “192.168.144.20”. Like in the picture below.
Open QGC, go to “Application Settings – Comm Links” and “Add” a new connection.
Name the connection as “UDP”, set the “Type” as “UDP”, the “Port” as “19856”, the “Server Addresses” as “192.168.144.12”. Then “Add Server” and click “OK” to return to the “Comm Links” page.
Touch the configured “UDP” connection and touch “Connect”, UDP connection is established.
Mark
If it is your first time to add a new connection in QGC, please do not check the option “Automatically Connect on Start”. It can be checked later when you confirm that the datalink is established successfully.
Communication with PC or AAT through UART
The UART port on HM30 ground unit, connected to a Windows device or other embedded device through the 4-Pin to USB-A cable, can be used as a transparent data transmission port. It can also connect to an antenna tracker (AAT).
On HM30 ground unit, go to “Settings” and set “UART” for “Datalink Mode”, and configure the correct baud rate. Changing the baud rate will change the UART port’s baud rate as well.
Please refer to the pin map of HM30 ground unit. Wire the “TX” pin from the UART port to the “RX” pin from the antenna tracker and wire the “RX” pin from the UART port to the “TX” pin from the antenna tracker. “GND” pin to “GND” pin.
The UART datalink connection is established.
Mark
Antenna trackers from different manufacturers may have different operating logistics. If the AAT device is paired to the HM30 ground unit via Bluetooth, then please ignore the wiring steps. For more detail, please refer to their user manual.
When the “Datalink Mode” is configured as Bluetooth, UDP, or Type-C, through the UART port on HM30 ground unit there will still be downloading data for antenna trackers. The antenna tracker baud rate can be changed according to your requirement.
Communication with PC through Type-C
Let’s take Mission Planner as an example.
On HM30 ground unit, go to “Settings” and set “Type-C” for “Datalink Mode”, and configure the correct baud rate.
Connect HM30 ground unit to the Windows device through the Type-C to USB-A cable, the Windows device will recognize HM30 ground unit as a COM device.
Open Mission Planner, select the correct COM port for HM30 ground unit and configure the baud rate.
The Type-C datalink connection to Mission Planner is established.
Mark
If the HM30 ground unit cannot be recognized as a COM device by your Windows device, please open “Computer – Manage – Device Manager” and check if there were any abnormal drivers. If so, please download and install the relevant drivers to solve the issue.
Solutions to Disconnection
If HM30 system failed to establish the datalink connection with the GCS, please try to follow the steps below to investigate possible reasons.
Confirm if the HM30 air unit is connected to your flight controller through the correct telemetry cable.
If it is a DIY telemetry cable, please check:
- If the correct pin map is followed?
- If the “TX” pins go to the “RX” pins?
- If any of the wires are defect?
On HM30 ground unit, go to “Datalink and Remote-Control Link Status” page to check the information to confirm if the flight controller are in good communication with the HM30 air unit.
When the communication is good, “Data Download” is not 0. If it is “0”, please go back to check step 1 and 2 again.
Go to “Settings – Datalink Mode” page and check:
- If the datalink output mode is correct?
- If the baud rate is correct?
In your GCS, check if “Datalink Connection” type is correct.
Mark
If you have done investigation by following all steps above, but the reason is still not located, please contact your dealer or contact SIYI Support immediately.
SIYI FPV APP
SIYI FPV is an Android application developed by SIYI and for configuring image transmission, displaying video stream, and monitoring link status on HM30 image transmission system, MK15 and MK15E smart controllers.
SIYI FPV System Display Interface Definition
Settings
In the “Settings” page, you can switch the “Decoding Type”, configure the “IP Addresses”, and enable the “Cross Sight”.
About Settings
Decoding Type: Switch between “Hardware Decoding” and “Software Decoding”. Please refer to your video input device to choose the decoding type with the best performance.
IP Addresses: Configure the IP address for camera A and camera B or for HDMI converter A and B. The “Rotate” buttons after the addresses can rotate the image in 180 degrees.
Cross Sight: Display a cross sight in the center of the image.
Link Status
Display the link status directly over the FPV image.
Mark
For details of Link Status, welcome to refer to Chapter 3.4 in this manual.
About SIYI FPV
Displays the software version of SIYI FPV and common contact information of SIYI Technology.
IMAGE TRANSMISSION
HM30 air unit supports maximum 1080p @ 60 fps and 150ms low-latency HD image transmission. It connects to most IP cameras and pods on market and can connect to HDMI cameras / pods through an HDMI input converter.
Then following steps will help you acquire image transmission display.
Using SIYI IP Cameras
Open SIYI FPV app, with the well-connected HM30 system you can check video display on your mobile device without any additional settings after powering on the system.
Using Third-Party IP Cameras / Pods
Before connecting a third-party camera or pod to the HM30 air unit, please change its IP address to “192.168.144.X”.
Mark
The “X” should not be “11”, “12”, or “20”, otherwise it won’t work. The three addresses have been occupied by the HM30 ground unit, the HM30 air unit, and the UDP network.
Let’s take QGroundControl as an example.
In camera settings, check and copy the RTSP addresses from your IP camera / pod.
In QGC, go to “General” page and slide to “Video Settings”
Configure “Source” as “RTSP Video Stream”. Then input the copied RTSP addresses of your IP camera / pod after the “RTSP URL”.
Go back to QGC home page to check video display.
Using HDMI Cameras / Pods
If you are using the SIYI original Air Unit HDMI Input Module to connect the HM30 air unit to your HDMI camera / pod, please refer to the steps below for acquiring video input.
Let’s take QGroundControl as an example.
- Open QGC, go to “General” page and slide to “Video Settings”.
- Configure “Source” as “RTSP Video Stream”. Then input the SIYI HDMI input module’s RTSP addresses after the “RTSP URL”.
- Go back to QGC home page to check video display.
Dual Video Stream Connection
After connecting the FPV Hub to the HM30 air unit, dual video streams will work in many ways.
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Dual video streams are recommended to multi-rotors commercial drone customers only.
When using dual video streams, please output video stream only from the Ethernet port (LAN) on HM30 ground unit. Through Type-C it only output one video stream. Outputting dual video streams through internal WiFi or USB WiFi could cause overheat in the ground unit and cause instability to the link.
Dual SIYI IP Cameras
The two SIYI IP Cameras should be Camera A and Camera B assigned with different IP addresses “192.168.144.25” and “192.168.144.26”. So, after connecting both cameras to the FPV Hub and opening SIYI FPV app, you can see dual video stream when the correct RTSP addresses are input in the IP addresses bars.
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The SIYI IP Camera coming with HM30 FPV Combo and HM30 Fly More Combo or sold alone is default to be Camera A, of which the IP address is “192.168.144.25”. When you purchase another IP camera from SIYI for dual video streams, please make sure that you get a Camera B (“192.168.144.26”).
Dual video stream does not work when the two streams use the same IP addresses.
Dual Third-Party IP Cameras
Make sure that the two IP cameras use different IP addresses and connect them to the FPV Hub. Then open SIYI FPV app, input the IP addresses in the bar and you will see two video streams.
SIYI HDMI Converter and SIYI IP Camera
The sold-alone Air Unit HDMI Input Module coming is default to be HDMI Converter A, of which the IP address is “192.168.144.25”. This IP has conflict to Camera A but no conflict to Camera B. When the dual video streams come from the same IP addresses, it won’t work properly. Thus, please do ask your seller to make sure the IP addresses are different when you are to use more than one HDMI converter or IP camera.
When the IP addresses are different, and the cameras / HDMI converters are connected to the FPV Hub, input the IP addresses in the bars and you will see two video streams after opening SIYI FPV app.
SIYI HDMI Converter and Third-Party IP Camera
Make sure that the IP camera use a different IP address from the HDMI converter and connect them to the FPV Hub. Then open SIYI FPV app, input the IP addresses in the bar and you will see two video streams.
Dual SIYI HDMI Converter
The sold-alone Air Unit HDMI Input Module is default to be HDMI Converter A, of which the IP address is “192.168.144.25”. When you purchase another HDMI converter for dual video streams, please make sure that you get the HDMI Converter B (“192.168.144.26”).
Then, after connecting the two HDMI Converters in different IP addresses to the FPV Hub and opening SIYI FPV app, you can see dual video streams when the correct RTSP addresses are input in the IP address bars.
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Dual video stream does not work when the two streams use the same IP address.
For more details about the IP addresses of the HM30 parts, please refer to the chapter 6.5 in this manual.
Common IP Addresses
Air Unit IP Address: 192.168.144.11
HM30 Ground Unit IP Address: 192.168.144.12
UDP Network IP Address: 192.168.144.20
SIYI IP Camera A’s IP Address: 192.168.144.25
SIYI IP Camera B’s IP Address: 192.168.144.26
SIYI HDMI Converter A’s IP Address: 192.168.144.25
SIYI HDMI Converter B’s IP Address: 192.168.144.26
SIYI IP Camera A’s RTSP Address: rtsp://192.168.144.25:8554/main.264
or rtsp://192.168.144.25:8554/ch01.264
SIYI IP Camera B’s RTSP Address: rtsp://192.168.144.26:8554/main.264
or rtsp://192.168.144.26:8554/ch01.264
SIYI HDMI Converter A’s RTSP Address: rtsp://192.168.144.25:554/live/0
SIYI HDMI Converter B’s RTSP Address: rtsp://192.168.144.26:554/live/0
Common Video Player: SIYI FPV, QGroundControl, EasyPlayer
Video Display URL: Please refer to the address given in camera settings. Cameras from different manufacturers come with different URL.
Network Diagnosis Tool: Ping Tools
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Android mobile device can diagnose the video disconnection issue by pinging the IP addresses of different devices through the Ping Tools app.
Windows device can diagnose through its CMD program.
Output HM30 Ground Unit Video Stream
There are multiple ways to output video stream to other devices from HM30 ground unit.
Through Internal WiFi to Android Mobile Device
Let’s take SIYI FPV as an example.
- On HM30 ground unit, go to “Settings”, set “Video Mode” as “Internal WiFi”.
- Turn on WiFi on your mobile device and search for the WiFi device starting with the ID “SIYI-6A*******” and pair. The password is “12345678”.
- Open SIYI FPV app and input the IP addresses of the SIYI IP Camera “rtsp://192.168.144.25:8554/main.264”
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The IP addresses is default to be “rtsp://192.168.144.25:8554/main.264” when you open SIYI FPV app for the first time.
Before connecting a third-party IP camera to the HM30 air unit, please change its IP addresses to “192.168.144.X”, otherwise the video stream won’t be displayed properly.
Through USB WiFi to Android Mobile Device
Let’s take SIYI FPV as an example.
- Use the Type-C to USB-A cable to connect the USB WiFi module to the HM30 ground unit.
- On HM30 ground unit, go to “Settings”, set “Video Mode” as “USB WiFi”.
- Turn on WiFi on your mobile device and search for the WiFi device starting with the ID “SIYI-6A*******” and pair. The password is “12345678”.
- Open SIYI FPV app and input the IP addresses of the SIYI IP Camera “rtsp://192.168.144.25:8554/main.264”
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The IP addresses is default to be “rtsp://192.168.144.25:8554/main.264” when you open SIYI FPV app for the first time.
Before connecting a third-party IP camera to the HM30 air unit, please change its IP addresses to “192.168.144.X”, otherwise the video stream won’t be displayed properly.
Through Type-C Port
Let’s take SIYI FPV as an example.
- On HM30 ground unit, go to “Settings”, set “Video Mode” as “USB”.
- Use the original cable to connect your mobile device to the HM30 ground unit.
- Turn on “USB Tethering” on your mobile device.
- Open SIYI FPV app and input the IP addresses of the SIYI IP Camera “rtsp://192.168.144.25:8554/main.264”
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Before connecting a third-party IP camera to the HM30 air unit and outputting video stream through the Type-C port, please change its IP addresses to “192.168.144.25” and its gateway to “192.168.14.12”, otherwise the video stream won’t be displayed properly. Meanwhile, the network segment of the video player on either your mobile device or your Windows device should be changed to “192.168.42.1”.
Through LAN Port to Windows PC
Let’s take “Easy Player” as an example.
- Use the “4-Pin to RJ45” cable to connect the RJ45 port on your Windows device to the Ethernet port (LAN) on HM30 ground unit.
- Check the Windows device’s network settings and confirm if it can acquire IP addresses properly? And if the IP addresses are in the network segment “192.168.144.X”.
- Install Easy Player and open it. Input the IP addresses of the SIYI IP Camera “rtsp://192.168.144.25:8554/main.264”.
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If the IP addresses configuration was failed, please refer to the picture below and do it manually.
Through the LAN Port and the HDMI Converter to HDMI Monitor
Let’s take an example of outputting video stream from the ground unit to an HDMI monitor through the LAN port on HM30 ground unit and the Ground Unit HDMI Output Converter.
Diagram of HM30 Ground Unit HDMI Output Converter
Use the power and signal cable for the HDMI output converter to connect the LAN port on HM30 ground unit and the VCC/LAN port on the converter.
Use the HDMI cable to connect the converter with the HDMI monitor.
Now power on HM30 and observe if the HDMI converter displays the image below (“FPV system is starting”) to check if the connection is successful.
If success, the HDMI monitor will display the video stream from the air unit after binding with the ground unit.
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If the HDMI monitor can display the FPV system’s starting image but not the video stream, please observe the OSD information at top of the screen and check if it displays the signal quality, then please refer to the Chapter 6.7 in this manual and follow it step by step.
The image display latency could be high or the video may freeze if the HM30 ground unit is outputting video stream to multiple devices simultaneously.
Function Settings of the Ground Unit HDMI Output Converter
You can configure the below functions of the built-in FPV system for the HDMI Output converter when it is connected with a mouse and an HDMI monitor at the same time.
- Change IP addresses for the video stream to switch to a different camera.
- Switch the displayed unit of airspeed in the OSD information.
- Enable or disable Mavlink OSD display.
- Enable or disable longitude and latitude display.
- Other functions.
Solutions to No Image
If HM30 ground unit failed to output video or the video stream cannot be displayed properly, please follow the steps below to investigate possible reasons.
Confirm if the HM30 ground unit is bound with the HM30 air unit and confirm if the camera is connected to the air unit.
- If the ground unit and air unit status indicators are Blue.
- If the air unit FPV status indicator is orange.
Open “SIYI FPV” app and check if the IP addresses of the IP camera or the HDMI converter is correc. SIYI IP camera and HDMI converter have been labeled with their IP addresses before delivery. For third-party IP cameras, please refer to their camera settings.
If the video stream still does not display, please follow the steps below and make a deep investigation according to the video output mode and the video display device you use.
Video Output through WiFi and Display on A Mobile Device
On HM30 ground unit, go to “Settings” and check if the video output mode is “Internal Wi-Fi” or “USB Wi-Fi”.
Please confirm if the WiFi device is the internal WiFi in HM30 ground unit or a USB WiFi connected to HM30 ground unit.
Input the IP camera’s IP addresses “192.168.144.25” in the “Ping Tools” app and check if the network communication is successful. If there is a response, then check if the RTSP address in the SIYI FPV app is correct.
Successful Network Communication
Network Communication Failed
If the network communication is failed, then input the IP addresses of the HM30 air unit into the “Ping Tools” app to check if the communication between the ground unit and the air unit is successful. If it is, then please check if the cable to connect the camera with the HM30 air unit is good, and the voltage input to the air unit’s XT30 port is between 11 V to 16.8 V.
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Some Android mobile devices will disable WiFi transmission after detecting no data transferred through the WiFi link by the system. In such a case, please disable the cellular network and go back to step one to investigate again.
Video Output through USB and Display on A Mobile Device
- On HM30 ground unit, go to “Settings” and check if the video output mode is “USB”.
- After step 1, if there was no video display in SIYI FPV app, please plug in the Type-C cable to HM30 ground unit’s Type-C port again and check if the USB connection method is “File Transfer” on your mobile device.
- If the SIYI FPV app can display the signal quality but still no video, please check if the RTSP addresses are correct (“rtsp://192.168.42.1:8554/main.264”).
- Use the “Ping Tools” to input the IP camera’s IP addresses “192.168.144.25” and check if the network communication is successful. If the communication is failed, please input the HM30 air unit’s IP addresses “192.168.144.11” into the “Ping Tools” app and check if the communication between the ground unit and the air unit is successful. If it is, then please check if the cable to connect the camera with the HM30 air unit is good, and the voltage input to the air unit’s XT30 port is between 11 V to 16.8 V.
Video Output through WiFi or LAN on A Windows Device
Use the “Win + R” key combo to wake up the “Run” program and input the command “cmd”.
Successful Network Communication
Network Communication Failed
Input the IP camera’s IP addresses “192.168.144.25” and press the “Enter” key to check if the communication is successful. If it is successful, please check if the RTSP addresses in Easy Player is correct or try to switch to other video players.
If the communication is failed, please input the HM30 air unit’s IP addresses “192.168.144.11” into the “Ping Tools” app and check if the communication between the ground unit and the air unit is successful. If it is, then please check if the cable to connect the camera with the HM30 air unit is good, and the voltage input to the air unit’s XT30 port is between 11 V to 16.8 V.
If the communication is still failed, then please input the HM30 ground unit’s IP addresses “192.168.144.12” and check if the communication between the ground unit and the Windows device is successful. If it isn’t, please check the network of the Windows device is good? And if the network settings can acquire IP addresses normally. You can also refer to the picture below to configure them manually.
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If you have done investigation by following all steps above, but the reason is still not located, please contact your dealer or contact SIYI Support immediately.
Firmware Upgrade
HM30 RF Firmware Upgrade
HM30 ground unit and HM30 air unit support firmware upgrading through PC software.
Before upgrading, it is necessary to prepare the tools, software, and firmware below.
- SIYI Assistant (PC Software)
- HM30 Ground Unit RF Firmware
- HM30 Air Unit RF Firmware
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Above software and firmware can be downloaded from SIYI Official website or downloaded from SIYI MK15/MK15E/HM30 RF Firmware Google Drive Link (https://drive.google.com/drive/folders/1CuaIkqK7feOsAzeWUXoySw-Lo5eXUlHX?usp=sharing) or got from your dealer.
- Fast Charging Cable (Type-C to Type-C)
- Converter (Type-C to USB)
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Above tools come with the HM30 package.
Fast charging cable and converter can be used to upgrade HM30 air unit and ground unit firmware.
HM30 RF Firmware Upgrade Steps
“SIYI Assistant” into your Windows device.
Connect the fast-charging cable with USB converter to the Windows device’s USB port and the HM30 ground unit’s Type-C port.
Run “SIYI Assistant” and switch to “Upgrade” page to check the HM30 ground unit’s current RF firmware version.
If the HM30 ground unit’s RF firmware is not the latest, then click the “Select File” button in the “RC” line to import the latest ground unit RF firmware. Then click “Upgrade” and wait till it is “100%” finished.
Disconnect HM30 ground unit from the Windows device. Use the fast-charging cable with USB converter to connect HM30 Air Unit’s Type-C port to your Windows device’s USB port. Then repeat the above steps to upgrade Air Unit RF firmware.
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Please choose the correct RF firmware according to the initial number in the boot loader number version. For instance, if the boot loader number is 5.1.0, then please choose the RF firmware version starting with number 5. If the boot loader number is 0.1.0, then please choose the RF firmware version with number 0.
When the ground unit RF firmware and the air unit RF firmware are different in initial numbers, they can still bind and work normally as long as their firmware version actually match.
Upgrade HM30 Ground Unit HDMI Output Converter’s Built-in FPV System
The build-in FPV system of the HM30 ground unit HDMI output converter can be upgraded by connecting a mouse and an USB disk at the same time.
Before upgrading, it is necessary to prepare the tools, software, and firmware below.
- USB Upgrade Cable (Dual USB-A Female Head)
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The above tool comes with the HM30 Ground Unit HDMI Output Converter in package.
- SIYI FPV App
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The above software can be downloaded from SIYI Official website or downloaded from SIYI HM30 Google Drive (https://drive.google.com/drive/folders/1dN6xjTmUncQ-8LZRCVpfNUr6SEq4XbTr?usp=sharing) or got from your dealer.
- USB Disk (with the latest version of the SIYI FPV app stored)
- Mouse
Firmware Upgrade Steps
- Connect the mouse and the USB disk with the USB upgrade cable.
- The built-in FPV system inside the HDMI output converter will open the file manager automatically when the system is starting.
- Click the SIYI FPV app in the USB disk and install.
- After installation, please check the SIYI FPV app version to confirm if the upgrade is successful.
- Plug out the USB upgrade cable and restart HM30.
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