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AVR-based, galvanically isolated, bidirectional DC energy meter with Modbus RTU interface.

License: MIT License

Shell 0.30% CMake 36.02% C 12.57% C++ 42.26% Python 8.84%
atmega avr energy-meter energy-monitoring ina226 isolated modbus bidirectional

avr-power-meter's Introduction

avr-power-meter

Device for monitoring DC energy usage (bidirectional) with an external shunt resistor like this.

This version is designed for monitoring 24V systems (2 voltage inputs, 1 shunt input).

It is galvanically isolated from the power supply, which allows using it in the battery stack without risks of creating ground loops.

It exposes Modbus RTU protocol over RS485 line. Modules can be daisy-chained using onboard angled pin headers.

The core of the board is INA262 chip with ATmega8 microcontroller.

History

See the v1 (test) version in [v1] branch.

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