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- current values everyday
- delta values (per day)
- voltage
- e-mail by Blynk (title and message template)
- data to your TCP server
- low voltage detector (experimental)
Values saved in ATtiny EEPROM cycle buffer (~2 millions cycles). "Software ESD protection".
Two chips: ATtiny85 in deep sleep mode. It counts impulses and wakes up ESP-01 to transfer data to Blynk every day. Chips talks by i2c line.
Power: 3AA batteries (or 2AA lithium batteries without voltage regulator)
Current: 15-24 uA in deep sleep, 75 mA when transmitting for ~5 sec
Lifetime: estimated 4 year battery life
Limits: 1 impulse per second (increased by constant in code)
Inputs: 2 water meters