Power Monitor

Small board to monitor power consumption of attached devices. Working either standalone with data stored on onboard flash or realtime by sending measurements to PC through USB.

Features

• Up to 4 concurrent devices monitored.
• 30V maximum system voltage, haven't tested the current limit yet.
• 8MB local flash storage
• Onboard programmer/debugger/usb to uart with STLINK V3MODS
• Long term energy consumption measurement

Progress

• Currently testing rev1
  • Replaced the dcdc with one that's easier to solder (and a bit cheaper).
  • Updated firmware to use DMA for uart output.
• Designing rev2
  • Replace V3MODS with connector and CP2102N for uart to usb.
  • Added USB-C with PD support using popular FUSB302B.
  • Replaced STML010K4 with STML010k8 because flash mem already 80% used without usb pd stuff.

Todo

• Flash via spi -> store and download data
• PAC Alerts
• RTC
• DMA reading I2C

Repo folders content

board

Diptrace files, both schematic and layout

datasheets

Contains the relevant datasheets

• DC-DC MPM3506A
• Flash Mem MX25L6433F
• MCU STM32L010K4
• Monitor PAC1954

dcafs

Contains the files needed to read/process the data from the board with dcafs.

firmware

Contains the ST CubeIDE project with c code without using LL nor HAL.