I created a demo app to explore the power management and monitoring features. It is based on Arduino and uses PowerFeather-SDK. So, follow these instructions to add support for the ESP32-S3 PowerFeather in the Arduino IDE and install the PowerFeather-SDK library.

Once done, you can download the demo app source code as a ZIP file on GitHub. Extract the ZIP file and open the project in Arduino IDE.

Afterwards, install the additional libraries needed by the demo app: ESPAsyncWebServer and ESPUI.

Don't forget to set the target board to "ESP32-S3 PowerFeather". You should now be able to build the demo app and flash it onto your ESP32-S3 PowerFeather like any other Arduino sketch.

Once the demo app is up and running on the ESP32-S3 PowerFeather, it acts as an access point and serves the demo web app. A phone, tablet or computer can connect to this access point, and the demo app can then be loaded by a web browser at the IP address 192.168.1.1.

Tablet connected to ESP32-S3 PowerFeather AP, loaded demo app on browser

The demo web app is a dashboard displaying information and controls of some power-related parameters of the ESP32-S3 PowerFeather:

• Battery Information
  - Voltage
  - Charge/Discharge Current
  - Charge Percent
  - Time Left Estimate (time-to-full/time-to-empty)
  - Health Percent Estimate
  - Cycles Estimate
• Supply Information
  - Voltage
  - Current
• Battery Temperature Sense
  - Enable Battery Temperature Sense
  - Battery Temperature Display
• Charging
  - Enable/Disable Charging
  - Max Charging Current (from 50 mA to 2000 mA)
• 3.3 V Outputs
  - Enable/Disable 3.3 V Header Pin Output
  - Enable/Disable STEMMA QT 3.3V Output
• Max Power Point
  - Set Max Power Point Voltage (from 4600 mV to 16800 mV)
• Power States
  - Enter Ship Mode- Enter Deep Sleep

With the demo app flashed on the ESP32-S3 PowerFeather, we can now perform the demonstrations.