LPTIM Timer- Counter on Sleep for Rain Gauge

[rattinp]

I work in a Remote Rain Gauge Project.A switch produces pulses (mm of rain). I develop a code for the Electrón using a interrupt in D2 pin and send the data every 15 minutes.
I need to improve the battery life, the STM32 micro have a LPTIM(low power timer ) would be used to count external pulses in sleep mode.
I looking for some code in particle comunnity without exit.
I realy apprecciate any help.
Thanks in advance

[ninjatill]

I gave you a possible solution in this thread, before I saw this double post:

Sleep mode - counter during sleep

I’m pretty sure the Photon would have to fully wake in order to capture interrupts. And considering that the sleep modes only wake with the WKP pin, the tipping cup would specifically have to be hooked up to that pin. The next best viable option would be to use an external 4 or 8 bit counter. Hook the tipping cup up to the counter, the photon would wake periodically to retrieve the counter value, publish values, reset the counter and go back to sleep. Look for a counter with a reset pin. There h…

[Rftop]

. I develop a code for the Electrón using a interrupt in D2 pin and send the data every 15 minutes.
I need to improve the battery life

For an Electron w/ tipping bucket rain gauge:
Stop mode (pin + time with SLEEP_NETWORK_STANDBY) = 6 mA
Stop mode (pin + time) = 3 mA

You can normally sleep @ 3 mA, and then switch to NETWORK_STANDBY during the rain event (interrupt starts firing).
After the rain event is over, go back to (pin + time) @ 3mA.
If you need lower current than that for the Electron, I believe an external counter is best.

[rickkas7]

The STM32F205 on the Electron/E Series does not have LPTIM. Only the STMF4xx and some other models do.