EasyPower

EasyPower

EasyPower is a simple power meter powered by ESPHome.

Features

• 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

Hardware

• ESP8266 dev board, such as NodeMCU
• INA219 module
• 128x64 OLED module, with I2C pins

That's all!

Wiring

Firmware

With the power of ESPHome, we can build and upload firmware to mcu with just one line of command:

esphome upload easypower.yaml

If 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: ""

Usage

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

Monitor

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:

License

MIT