atgm336h
Table of Contents
ATGM336H
The ATGM336H GNSS module is a Chinese ublox MAX-M8 type clone, suitable even as a drop in replacement. It is based on the AT6558 GNSS SoC.
GNSSToolKit
Update late 2025 - the original ICOfChina download URL for the GNSSToolKit link has stopped working, here's a locally hosted version of the file.
Making Adjustments
The ATGM336H can largely be manipulated by sending PCAS commands, the documentation for which are supported is very sparse. Most of these I have captured from the GNSSToolKit application. Without GNSSToolKit, one can echo these commands directly to the device.
| Description | PCAS | Command |
|---|---|---|
| save configuration | $PCAS00*01 | echo -en '$PCAS00*01\r\n' > /dev/ttyUSB0 |
| hot restart | $PCAS10,0*1C | echo -en '$PCAS10,0*1C\r\n' > /dev/ttyUSB0 |
| cold restart | $PCAS10,2*1E | echo -en '$PCAS10,2*1E\r\n' > /dev/ttyUSB0 |
| factory reset | $PCAS10,3*1F | echo -en '$PCAS10,3*1F\r\n' > /dev/ttyUSB0 |
| stationary mode | $PCAS11,1*1C | echo -en '$PCAS11,1*1C\r\n' > /dev/ttyUSB0 |
| GPS Only | $PCAS04,1*18 | echo -en '$PCAS04,1*18\r\n' > /dev/ttyUSB0 |
| BSD Only | $PCAS04,2*1B | echo -en '$PCAS04,2*1B\r\n' > /dev/ttyUSB0 |
| GPS+BDS | $PCAS04,3*1A | echo -en '$PCAS04,3*1A\r\n' > /dev/ttyUSB0 |
| GPS+GLONASS | $PCAS04,5*1C | echo -en '$PCAS04,5*1C\r\n' > /dev/ttyUSB0 |
| 115200 Baud | $PCAS01,5*19 | echo -en '$PCAS01,5*19\r\n' > /dev/ttyUSB0 |
| 0.2 Hz | $PCAS02,5000*2A | echo -en '$PCAS02,5000*2A\r\n' > /dev/ttyUSB0 |
Some configuration parameters do not have PCAS values and must be sent as raw hex.
| Description | Command |
|---|---|
| Enable DOP Messages | echo -en '\xBA\xCE\x04\x00\x06\x01\x01\x01\x01\x00\x05\x01\x07\x01\x0D\x0A' > /dev/ttyUSB0 |
atgm336h.txt · Last modified: by millerjs