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Thanks for this. I’ve just tried using this via ttyGSM0 this morning and after an initial hiccup when I lost the mux connections the AT+UTIME=1,2 comes back with an OK but I still have no consistent pulse going into the raspberry pi from what I can see. I used the python code in this thread to check the pin I’m using (GPIO18) and it goes high a couple of times then pauses for a minute or two and then goes high. I think I’ll drop The Pi Hut a message and see what my options are as this isn’t providing what I need.
For example, I’m looking for the time pulse information to go into gpsd (like most GPS modules provide) and at first glance this seems impossible.