Reply To: Raspberry Pi – couple of questions

[Jimbob17]

Just picking this up again as it is still not working and I don’t particularly want to consign £60 (around AU$120) worth of kit to the dust bin …

Brand new install on a Pi Zero using the lite image burnt to an SD card via the Raspberry Pi Imager software. I have gsmMuxd built and working and I have also soldered the jumper to power cycle the HAT on reboot. Still encountering the issues mentioned above – using the information from post 18578, I get this,

Welcome to minicom 2.8

OPTIONS: I18n
Port /dev/ttyGSM0, 14:49:27

Press CTRL-A Z for help on special keys

AT
OK
AT+UTIMEIND=1
OK
AT+UTIME=1,1
OK

+UUTIMEIND: 1,0,0,0

+UUTIMEIND: 4,2,0,0
AT
OK
AT+UGPS=1,1,71
ERROR

Doesn’t matter if I use ttyGSM0 or ttyGSM1, I get the same error message plus it doesn’t matter what the AT+UGPS command is as nothing works and everything results in ERROR. It seems as soon as I use AT+UTIME then I cannot start the GPS module at all. Is this a super bad bug or just something out of sequence? Is there an email address for support as the forum doesn’t seem to be helping much to get PPS working on this HAT.

Currently using my $5 u-blox module from AliExpress which surprisingly “just works” after I realised the interference from the USB3.0 connections on the Pi 4 were blocking the module / antenna – quick ferrite core suppressor added to the cable and it works.