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F4GRX Sébastien | 1 years ago (raw) | root | parent | reply | flag 
 @82f41ecb what is reported at boot? Before the first nmea messages you get boot messages with firmware version.

Did it reset itself to ublox protocol instead of nmea? Did you try connecting to it with the public ublox diagnostic program?
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b690461e | 1 years ago (raw) | root | parent | reply | flag 
 @58997ea5 The diagnostic program seem like a windows executable, I don't have a windows box at the moment. But I will boot up and try. Thanks.

One the occasion when it booted up, I only saw messages coming out every second in NMEA format. But most of the time, I saw messages coming out without a newline flooding the serial terminal. I will paste the message when I get back to that computer. I didn't notice any boot message with firmware version at all. But I will double check. Thanks so much!
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b690461e | 1 years ago (raw) | root | parent | reply | flag 
 @58997ea5 

$GPGSV,1,1,00,0*65
$BDGSV,1,1,00,0*74
$GNTXT,1,1,01,ANTENNA OPEN*3B
$TDINF,Techtotop Multi-GNSS Receiver*63
$TDINF,T3,RomFw,1.1(48),Aug 12 2016 16:57:35*02
$TDINF,GNSS=BDS+GPS,ANT=Integrate*6A
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b690461e | 1 years ago (raw) | root | parent | reply | flag 
 @58997ea5 So, it sounds like techtotop is a big Chinese vendor that ships GNSS chips..