How to Configure the P8 Radio Telemetry Module

Summary

P8 Radio is a remote data transmission module for electronic compass; it has a remote data transmission capability, a transmission rate of up to 375Kbps, supports point-to-point, relay communication, and other working modes.

Technical Specifications

working frequency	840~845Mhz
Spreading Method	Frequency Hopping/Fixed Frequency、Transparent transmission、GMSK、 2GFSK、4GFSK、QPSK
Forwarding error detection	Hamming, BCH, Golay, Reed-Solomon, Viterbi
Error detecting	32 bits of CRC, ARQ
Range	Reference distance: 40km(The transmission distance is different under different environments/configurations, please refer to actual use)

Sensitivity	-109 dBm @ 115.2 kbps
	-108 dBm @ 172.8 kbps
	-106 dBm @ 230.4 kbps
Transit power	100mw~1000mw(20~30dBm）； default：1000mw
Antenna gain	3DBi
serial interface	3.3V CMOS TTL
Baud rate	300bps to 230kbps(default:57600)
Link Rate	345kbps Max
Operating Modes	Point-to-Point
Operating Modes	Repeat Mode
Operating Voltage	12V~60V
Input Current	>2.5A
Power consumption	Sleep: < 1mA (Future)
	Idle: 20mA
	Rx: 45mA to 98mA
	Tx Peak: 2A
Interface	Antenna: SMA inner needle
	Serial: GHR-06V-S
	USB: TYPE-C
	Power: XT30PW-M
Operating temperature	-40°C~85°C
Weight	55g(No antenna);
	Antenna:31g
	Total:86g
Size	64.6mm×39.7mm×16.5mm

Pinouts

Connection with Flight Control

PixHack: Radio Interface Plugged into Flight Control
Pixhawk: plug into the flight controller’s telem1 or telem2 interface
V5+/V5 NANO/X7 series: Use dedicated wiring to connect the flight control TELEM1/TELEM2 interface and the data transmission Data interface.

Ground Station Connection

For Mission planner

Please select a 57600 baud rate when connecting. Note whether the driver is installed correctly and whether the port number is selected.

For QGroundcontrol

It should automatically connect once recognized by QGroundControl.

P8 Configuration Guide

Tip
The P8 is fully configured at the factory and supports plug-and-play for most use cases. If you have specific requirements, follow the instructions below for configuration.

Driver Installation

If your computer prompts for a missing driver after USB connection (as shown in the image below):

Download the driver software (CP2102), extract the files, and install it.

Note
For Windows 64-bit systems: Install CP210xVCPInstaller_x64.exe
For Windows 32-bit systems: Install CP210xVCPInstaller_x86.exe
For macOS and other systems: Search for “CP2102 driver” in your preferred search engine.

Enter Configuration Mode

Download and install a serial port assistant tool or other serial communication software.
Connect the data transmission module to your computer via USB and launch the serial port assistant.

Method 1

Select the USB COM port of the data transmission module, set the baud rate to 9600, data bits to 8, parity to none, stop bit to 1, and both transmission/reception to ASCII.
Use tweezers or a similar tool to press and hold both the CONFIG and RESET buttons. Release the RESET button first, then release the CONFIG button.

Method 2

Select the USB COM port of the data transmission module, set the baud rate to the module’s current baud rate (factory default: 57600), data bits to 8, parity to none, stop bit to 1, and both transmission/reception to ASCII.
Send the following command:

+++

Note
Method 2 is recommended with the SSCOM serial assistant (some serial tools may fail to send this command).
Do NOT press Enter/Return to line break after this command.

The serial assistant will display “NO CARRIER ok” to confirm successful entry into AT configuration mode.

Enter the parameters in the serial assistant and click “Send” to complete configuration (each successful configuration will return “ok”).

Note
Press Enter/Return to line break after each AT command (including the last one).

Common Parameter Explanations:

Quick configuration commands
commands	meaning	value
ATS101	Operating mode	0 – Master
		1 – Slave
		2 – Repeater
ATS102	Serial port baud rate	0 – 230400
		1 – 115200
		2 – 57600 (default)
		3 – 38400
		4 – 28800
		5 – 19200
		6 – 14400
		7 – 9600
		8 – 7200
		9 – 4800
		10 – 3600
		11 – 2400
		12 – 1200
		13 – 600
		14 – 300
		15 – 691200
		16 – 460800
		17 – 921600
ATS103	link rate	0 – 19200
		1 – 115200
		2 – 172800
		3 – 230000
		4 – 276000 (default)
		5 – 340000
		6 – 24700
		7 – 19200 NB
		8 – 57600
ATS104	Network Address	Each unit in the network must use the same address. It is recommended not to use the default parameter 1234567890; to change the network address, you can use the ATS104=XXXXXXXX command
ATS105	Local address	Each unit in point-to-point has a unique address unit; the host defaults to 1, and it should not be modified.
ATS108	Transmit power	20 – 100mW
		21 – 125mW
		22 – 160mW
		23 – 200mW
		24 – 250mW
		25 – 320mW
		26 – 400mW
		27 – 500mW
		28 – 680mW
		29 – 800mW
		30 – 1000mW (default)
		31 – 1250mW
		32 – 1575mW
		33 – 2000mW
ATS110	Data Format	1 – 8N1 (default)
		2 – 8N2
		3 – 8E1
		4 – 8O1
		5 – 7N1
		6 – 7N2
		7 – 7E1
		8 – 7O1
		9 – 7E2
		10 – 7O2
ATS133	Network Type	0- Point to Multipoint
ATS133	Network Type	1 – Point to Point
ATS140	Target address	The value is 1 to 65535 (depending on the network type, 65535 is broadcast). Point-to-Multipoint – 65535 for master and l for slave. Point-to-point – master= slave ATS105; slave = 1 (master)

Quick configuration commands
Operating mode	commands	meaning
Point-to-point	AT&F6	Master default parameters
Point-to-point	AT&F7	Slave default parameters
Point-to-multipoint	AT&F1	Master default parameters
	AT&F2	Slave default parameters
	AT&F3	Repeater default parameters

Note
Use the AT&V command to query the current configuration.

Point-to-Point (P2P) Communication Configuration

For P2P mode, copy the parameters below into the serial assistant, press Enter/Return, and click “Send” to complete configuration (each successful configuration will return “ok”).

Master Station Configuration (Ground)

Parameter Restrictions:

ATS105 range: 1
ATS140 range: 2 ~ 65535

Parameter Description: Set to master mode, baud rate 57600, air data rate 276000, network IP 725527, transmit power 1000MW, device address 1, target address 2.

AT&F6
ATS102=2
ATS103=4
ATS104=725527
ATS108=30
ATS105=1
ATS140=2
AT&W

Slave Station Configuration (Air)

Parameter Restrictions:

ATS105 range: 2 ~ 65535
ATS140 range: 1

Parameter Description: Set to slave mode, baud rate 57600, air data rate 276000, network IP 725527, transmit power 1000MW, device address 2, target address 1.

AT&F7
ATS102=2
ATS103=4
ATS104=725527
ATS108=30
ATS105=2
ATS140=1
AT&W

P2P Configuration with Repeater

Master Station Configuration (Ground End)

Parameter Restrictions:

ATS105 range: 1
ATS140 range: 2 ~ 65535

Parameter Description: Set to master mode, baud rate 57600, data rate 276000, network IP 725527, transmit power 1000MW, device address 1, target address 2.

AT&F6
ATS102=2
ATS103=4
ATS104=725527
ATS108=30
ATS105=1
ATS140=2
ATS141=1
AT&W

Slave Station Configuration (Ground End)

Parameter Restrictions:

ATS105 range: 1
ATS140 range: 2 ~ 65535

Parameter Description: Set to master mode, baud rate 57600, data rate 276000, network IP 725527, transmit power 1000MW, device address 2.

AT&F7
ATS102=2
ATS103=4
ATS104=725527
ATS108=30
ATS105=2
ATS118=3
ATS140=1
AT&W

Repeater Configuration (Air End)

Parameter Restrictions:

ATS105 range: 2 ~ 65535
ATS140 range: 1

Parameter Description: Set to slave mode, baud rate 57600, data rate 276000, network IP 725527, transmit power 1000MW, device address 2.

AT&F7
ATS101=1 (Repeater)
ATS102=2
ATS103=4
ATS104=725527
ATS108=30
ATS105=3
ATS118=1
ATS140=1
AT&W

Point-to-Multipoint (P2MP) Communication Configuration

For P2MP mode, copy the parameters below into the serial assistant, press Enter/Return, and click “Send” to complete configuration (each successful configuration will return “ok”).

Master Station Configuration

Parameter Restrictions:
ATS105 range: 1
ATS140 range: 65535
Parameter Description:
Set to master mode, baud rate 230400, data rate 340000bps, network IP 725527, transmit power 1000MW, device address 1, target address 65535.

AT&F1
ATS102=0
ATS103=5
ATS104=725527
ATS108=30
ATS105=1
ATS118=3
AT&W

Slave Station 1 Configuration

Parameter Restrictions:

ATS105 range: 2 ~ 65535 (must be unique among slaves)
ATS140 range: 1

Parameter Description: Set to slave mode, baud rate 230400, data rate 340000bps, network IP 725527, transmit power 1000MW, device address 2, target address 1.

AT&F2
ATS102=0
ATS103=5
ATS104=725527
ATS108=30
ATS105=2
ATS140=1
AT&W

Slave Station 2 Configuration

Parameter Restrictions:
ATS105 range: 2 ~ 65535 (must be unique among slaves)
ATS140 range: 1
Parameter Description:
Set to slave mode, baud rate 230400, data rate 340000bps, network IP 725527, transmit power 1000MW, device address 3, target address 1.

AT&F2
ATS102=0
ATS103=5
ATS104=725527
ATS108=30
ATS105=3
ATS140=1
AT&W

Slave Station 3 Configuration

Parameter Restrictions:
ATS105 range: 2 ~ 65535 (must be unique among slaves)
ATS140 range: 1
Parameter Description:
Set to slave mode, baud rate 230400, data rate 340000bps, network IP 725527, transmit power 1000MW, device address 4, target address 1.

AT&F2
ATS102=0
ATS103=5
ATS104=725527
ATS108=30
ATS105=4
ATS140=1
AT&W

For additional slave stations, follow the same pattern.

Frequency Setting

Note
Do not modify the frequency unless necessary. If the master and slave stations are configured consistently but fail to communicate, check that their frequency settings match (mismatched frequencies will prevent communication). A maximum of 50 frequencies can be set.

ATP0?

Modify Frequency Command (Factory Default Example):