I'm trying to use a flow meter with Wemos Mini. Most tutorials are using Arduino boards ( which code and HW work OK ), but since I want this device to send alerts over the internet when abnormal usage/leakage is detected, I want to use Wemos Mini using How to Use Water Flow Sensor - Arduino Tutorial. On top of if will add my code for notifications using Telegram.
BUT - after uploading the original code (before adding Telegram changes ), an error occurs during code run :
ISR not in IRAM!
I tried to change Pin - but still getting this error,