How do I switch from NEMA to the Sirf Protocol on the ISM300?

You need to send a Carriage Return (0x0D) and Line Feed (0x0A) after the checksum (*37) for the SiRF chip to act on the message.

Ex: $PSRF100,0,57600,8,1,0*37<CR><LF>

Posted in: GPS, Sirf III