@asaph I've tried it out and it works fantastically 🎉 Thanks @Daniel!

@jmarcelino said in Cheapest GPS for time sync only: Interesting alternative, but i will stay with GPS - it also work on ship and is really simple to use (mostly UART). As always i probably do not need position - but if i can get it than it sometimes can be usefull as a gadget. And can be simply repleaced by more accurate GPS without firmware modification. Then better is GPS for me here.

@aldrinleal your parser is really minimalistic and do not check crc and fix the best i have found was https://github.com/inmcm/micropyGPS/blob/master/micropyGPS.py it need some modifications to be more usefull and you extend error handling. Also at the end you need to add GLONASS commands to the list - but work like a charm :)

@jmarcelino I think that we can create something more accurate - on that link all is mixed up Adding not one topic only new menu group e.g.: ->Where to buy: --------->Sensors ------------------>I2C ------------------>analog --------->switches --------->Bateries --------->antennas --------->simple electronics --------->box or only limit it to interesting sensors. But as always on such topic we can end with spam with adverts not real used items by users :(

@Jiemde This is correct! They use the same sleep method as the deep sleep shield to control the devices sleep. I.e. setup_sleep() + go_to_sleep().

Hi @vervoortraf, you should not need to pass any arguments to the uart.readline() function. Just run uart.readline() and it should detect the '\n' in any of the messages sent to your LoPy via UART. https://docs.pycom.io/pycom_esp32/library/machine.UART.html#machine.uart.readline Let me know if this helps! Thanks, Alex

@robmarkcole choices I see other than from GPS are use a real battery backed up RTC (maybe via i2c https://www.sparkfun.com/products/12708). get the time from network on startup. obviously NTP works with Cat-M1 and Wifi if you have an internet connection. It appears you could send date/time via downlink on sigfox, but due to rate limitations you would probably need to explicitly request time on boot. Lorawan - you would need to provide a time service. It doesn't appear to be in the protocol spec, and traversal time would mean time is a bit wrong if you hop through nodes. Option 1 would probably be the best option in my opinion. Works without a network if datetime/set correctly initially.

I am waiting an ublox Neo module to try this project. Very interesting

@livius said in I connected a passive GPS on a LoPy device on the GPS pin. What is the pin number to read those values?: @rskoniec Thank you :) P.S. price? About 30$