pekaway / esp32-ble-wifi-shunt

ESP32-C3 Battery Monitor Shunt

ESP32-C3 based SHUNT

Features:

• esp32-c3
• Step down converter 6-32V input
• BLE or Wifi -> PCB antenna
• INA226 sensor
• WS2812b status led.
• USB-C for programming

Currently works with a 200A/75MV shunt.

First software

• BLE broadcast
• read SOC, AMPS, VOLT
• Store battery size in AH
• Set SOC
• Read via NRF connect or Python scripts (see REPO)
• Store SOC in SPIFFS file system

Bugs and wish list:

• History data
• Improve BLE services
• Wifi HTTP/MQTT version
• case
• Serial data output
• Power consumption reduction

Known issues:

• WS28b12 connected to SPI Flash pin 24, this causes a problem and the ESP will not boot.
• DeepSleep Flash problem with ESP32-C3 USB-C port
• own consumption is not counted
• below 100mA accuracy decreases

Hints:

If the COM port is not found, rotate the USB-C cable. Not all pins are used.