write $PCAS commands

[NDC-SC]

In the Arduino IDE Examples> TTGO TWatch> BasicUnit> TwatcV2Special> GPSDisplay sketch, there are several write instructions to $PCAS commands. write("$PCAS06,01B\r\n"); // version information write("$PCAS04,51C\r\n"); // satellite reception GPS and GLONASS write("$PCAS03,1,0,0,0,1,0,0,.... // define which NMEA messages to receive write("$PCAS11,3*1E\r\n"); // mode ?

Can you please provide a link to information on the command parameters, including construction of the checksum. For example, resetting PCAS03 to include all NMEA messages. Is the instruction write("$PCAS03,1,1,1,1,1,1,1,1,0,1,,,1,0*02\r\n"); correct ?

The Quectel_L76KL26K_GNSS (in Chinese) document does not include PCAS06 and PCAS11 The Quectel_L76-LBL26-LBLC86L_GNSS_Protocol_Specification_V1.1 does not include any PCAS commands.

Thanks

[lewisxhe]

This is the manual CASIC_ProtocolSpecification.pdf

[NDC-SC]

Thanks for the link. Do you have details of PCAS11 as used in the sketch: write("$PCAS11,3*1E\r\n");

[lewisxhe]

I can't find the command containing PCAS11. This may be an error

[NDC-SC]

See line 55 of the GPSDisplay sketch in Arduino IDE Examples> TTGO TWatch> BasicUnit> TwatcV2Special

[lewisxhe]

The command comes from SoftRF Refer to this for specific commands AT3340 ProductManual.pdf

[NDC-SC]

Thank you for providing details of writing $PCAS commands.