Using a Terminal Emulator for sending commands to the E108-GN01 GNSS module
By default, the USB to Serial converter is connected to the GNSS receiver module. The
module accepts a variety of commands which can be used, among other things, for:
•
Changing the baud rate (default is 9600 baud)
•
Changing which NMEA sentences are output
•
Enabling or disabling the various GNSS systems (GPS, Galileo, GLONASS and
Beidou)
You can type the command in full on the Terminal Emulator, and it will be transferred to the
GNSS module by the QLG2 USB to Serial converter.
A common error is to not calculate the checksum properly; these are the last two characters
of the command string. The actual command is prefixed by a $ and terminated by a *
followed by the two checksum characters. All the ASCII byte codes of the command
between the $ initiator and * terminator, but not including the $ and the *, are logically
XOR’ed together, which produces the checksum.
If this seems like too much of a headache,
and actually it really IS too much of a headache
,
then asking Google about “NMEA checksum calculator” will find you lots of easy calculators
that do this for you. For example
https://nmeachecksum.eqth.net/
QLG2 manual for firmware 1.00a
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