geologic

The only way is using a counter. For 15 minutes, you set an ALARM_EVERY_MINUTE and increment a counter. When counter=15, thats your 15 minute interval.

Did you manage to solve your problem? This happened once to me when i forgot to power RTC.

For the 1) question: check year, if it is 00, it was powered for the first time: ``` DateTime MyTimestamp; MyTimestamp = Clock.read(); if (MyTimestamp.Year==00) { Clock.promptForTimeAndDate(Serial); } else {...

Well, i'm prety sure the problem is not XTAL pin as input, as i have a standalone working sketch using that pin and PinChangeInterrupt library. If i try to use...

After trial and error i manage to put everything together... My original code works ok with NeoSWSerial and a GSM modem. Adding PinChangeInterrupt works ok and my pin responds to...

> > Im also seeing a similar issue with a Lora Chip & NeoSWSerial + a pin change interrupt the interrupt fires then i loose connection to my Lora chip...

Any news about this issue? I'm also interested on medium distance mode...

That would be great, thumb up!

> > > Has anyone tested this? The manufacturer claim to be somewhat compatible with SIM800C. Well, not sure what manufacturer claims, but it is not. Some AT commands are...

SIM7020 seems to have a different HTTP stack, to make a HTTP POST request i use this sequence (not all AT commands are mandatory): AT AT+CGSN AT+CSQ AT+CGREG? AT+COPS? AT*MCGDEFCONT="IP","...