Pico Power Monitor RP2040-Zero Micro Python Files

This the repo contains the files needed to run the hardware side of things, for the Pico Power Monitor.

Project is broken up into 4 sub-projects.

• MicroPhython code to drive the hardware. - This Repo. This is the project that runs on the RP2040-Zero. Current MicroPython firmware 1.28.

• KiCAD Custom PCB Design

  • Repo: /PicoPowerMonitor_KiCad (Direct link here)

  • PCBWay Shared Projects (Direct link here)

• PicoPowerMonitor - This is the Windows 11 application, completely optional. The PicoPowerMonitor can and does run without this application.

  • Repo: /PicoPowerMonitor (Direct link here)

• FreeCAD 3D Printed Case Design. (Direct link here)

Key Features

• Instantiates I2C communications to OLED display and the TI INA260 Power Montior IC.
• Sets up the TI INA260's OCL (Over Current Limit) register. Default 16 A. Configurable.
• Reads the INA260's registers 100 times / second for Curent, Voltage and Power values.
• Updates OLED Display with INA260 readings.
• Interupt handler to shut down the Infineon BSC007N04LS6 N-Channel MOSFET during an OCL event and update the 2.4" OLED Display to notify user.
• Interupt handler to take the input of momentary SPST reset button. Clears the INA260 ALERT and restarts main loop.
• Streams current and voltage readings to native Windows 11 application.

Installation

• Flash UF2 bootloader uf2 can be downloaded here)
• Pick your IDE of choice, Thonny, VSC...
• Upload the files to the RP-2040-Zero. If this is all new to you, Thonny is as easy as it gets.
• • Direct link here)
  • Need to maintain fonts directory structure. You don't, this will not run!
  • i2c_scan.py is not required, just there to verify the RP2040-Zero can see the display and the INA260 on the I2C bus.
  • main.py (named as such as to run on power-up) This is the core script.
  • ssd1309.py is the open-source SPI & I2C display driver by rdagger / micropython-ssd1309
  • xglcd_font.py handles the GLCD Fonts, not sure who to give credit for this work.
  • Make sure the script runs.
  • After that disconnect from PC and reconnect, main.py should fire up and the display should come to life.

Images

-Thonny screenshot

• OLED display

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

• Built as a dedicated utility for hardware repair professionals and electrical engineers.
• Display powered by open-source driver by rdagger / micropython-ssd1309. https://github.com/rdagger/micropython-ssd1309