EM408 Sentence Rate

I’ve been using the EM408 in the KinetaMap, and I’ve configured it to report GGA and/or RMC sentences at a 1 Hz rate, but the sentences aren’t consistently logged at a 1 Hz rate.

I’ve found and fixed some KinetaMap bugs related to receiving GPS messages, so it wouldn’t surprise me if there we still other software issues. I don’t have a good setup for monitoring the serial line while collecting GPS data, so I can’t easily tell where the problem lies.

Should I suspect the KinetaMap software, or does the EM408 miss updates from time to time?

-Michael

I’ve solved my own problem. The KinetaMap throws out any sentence with an invalid checksum, but it miscalculates the checksum if it has an ‘A’…‘F’ in it.