I am trying to use quectel L80 GPS receiver for my project. I am trying to configure the L80 using the PMTK strings. But the problem is the string should also contain a hexadecimal check sum.
This is the example string given in the "protocol specification" document. In this string '29' is the check sum. My question is how do I generate the checksum? I know that for NMEA strings, the check sum is generated by 'XOR' operation of consecutive characters between '$' and '*' . while calculating the check sum do I also need to include 'comma'?