Hi everyone! This is a basic question about GPS modules. I'm using two GPS modules for testing, Tellit JF2 and Venus. I want to set the GPS send only RMC and GGA messages and send it every 30s. I know that I need to use NMEA 103 message to set this. But I was not successful.
I have set it to output only RMC messages but it outputs all default messages. i.e. RMC,GGA,GSA, VTG,etc
This is from the reference manual about query/control message.
I did not read this dataasheet, except the snapshot you attached above, but I would expect a response from the GPS module in the case of the command being accepted or rejected ( eg: "OK", "-1", etc...). Take a look at the documentation of this module and check the error message from it, if sent, right after above command issued to it.