ESPHome - Aurora Inverter Monitor
This project aims the integration between Power-One (ABB) Aurora Inverters and ESPHome using an ESP8266/ESP32 board.
The communication runs over the RS485 interface of the Inverter using a TTL-to-RS485 moudule. The module is attached to the ESP board using the pins declared in InverterMonitor.h:
#define RX 14 //GPIO14
#define TX 27 //GPIO27
#define TX_CONTROL_GPIO 26 //GPIO26
The Aurora Communication Protocol used in the communication is handled by the jrbenito/ABBAurora library.
ESPHome Sensors
This Inverter Monitor exploits the communication library to expose some of the available inverter's data:
| Sensor name | Unit of measurement | Accuracy decimals |
|---|---|---|
| v_in_1 | V | 2 |
| v_in_2 | V | 2 |
| i_in_1 | A | 2 |
| i_in_2 | A | 2 |
| power_in_1 | W | 0 |
| power_in_2 | W | 0 |
| power_in_total | W | 0 |
| power_peak_today | W | 0 |
| power_peak_max | W | 0 |
| inverter_temp | °C | 2 |
| booster_temp | °C | 2 |
| cumulated_energy_today | Wh | 0 |
| cumulated_energy_week | Wh | 0 |
| cumulated_energy_month | Wh | 0 |
| cumulated_energy_year | Wh | 0 |
| cumulated_energy_total | Wh | 0 |
NOTE:
power_in_totalis the sum ofpower_in_1andpower_in_2values.
More sensors can be created based on the DSP_VALUE_TYPE enum values.
An additional text_sensor named connection_status is exposed to monitor the connection between the ESP and the inverter.
Building and Flashing
The full guide of the esphome ccommand line interface can be found in the ESPHome documentation.
Installing ESPhome cli
pip3 install esphome
Generating and compiling the source code
esphome config.yaml compile
Uploading the binary to the ESP device
esphome config.yaml upload