I purchased a PMB-648 off of Amazon the other day because it was cheap and did NMEA. The claim on Amazon and on the packaging is that I can change the baud rate. I've scoured the internet for the past three days. I've tried Sirfdemo, gpsinfo, direct connection via FTDI. No matter what commands I send it with and without checksum the GPS doesn't acknowledge anything has been sent. I've seen some posts that it when they sent invalid commands they would get an error. I'm using the ttyl connection. I'm debating on trying the RS232 connection to see if that would help me. From what i read online it goes to the same serial connection so it seems pointless. Also does anybody know what the TP1 pad does?
I need the baud rate to be at least 9600 for my drone project.
Thanks for any help