What's inside Saures R1?

Question

Microcontrollers

What's inside Saures R1? This is a device for automatic transmission of meter readings. I’m interested in how the reading is arranged (after all, as I understand it, the meters do not transmit current readings, but only transmit impulses about reaching the next cubic meter of water, for example) - given that the device only runs on 3 AA batteries.

Answer 1

I would divide the device into 2 structural blocks and implement a pulse counter on a separate device (chip), with a separate power supply - so that it works for 5 years from it, and the MK itself wakes up on a timer, polls this pulse counter and transmits readings via 3g or Wi-Fi and again goes to sleep.