EasyPower is a simple power meter powered by ESPHome.
- Measure the voltage and current of the load device
- Calculate the power of the load device in mW
- Cumulative power consumption in mWh
- Cumulative operating time to evaluate battery usage
- ESP8266 dev board, such as NodeMCU
- INA219 module
- 128x64 OLED module, with I2C pins
That's all!
With the power of ESPHome, we can build and upload firmware to mcu with just one line of command:
esphome upload easypower.yamlIf you need monitor the data trends, you should set Wi-Fi and MQTT broker information first in secrets.yaml:
wifi_ssid: ""
wifi_password: ""
mqtt_broker: ""Finally, you can connect the load device which want to be measured, for example a NodeMCU:
- Connect power 5V to VIN+
- Connect VIN- to V5 on NodeMCU
- Connect power GND to NodeMCU GND
- Connect power GND to INA219 GND
You can use MQTT Explorer to monitor data trends across measurements, just selecting the topic easypower/metrics, then using "Add to chart panel" in the Value panel, aha, a data trend chart apperaed:
MIT