dirtie-node

A Raspberry Pi Pico W based soil monitoring system that publishes moisture readings to an MQTT broker.

Overview

Dirtie is a microcontroller application designed to monitor plant soil conditions using a Raspberry Pi Pico W. It reads soil moisture data from connected sensors and publishes the readings to an MQTT broker, enabling integration with other monitoring and automation systems.

Ecosystem

dirtie-srv

• Contains broker and web server used for device provisioning and data collection

dirtie-client

• Android application used for device setup and viewing data from the device

Hardware Requirements

• Raspberry Pi Pico W
• Adafruit soil moisture sensor

Software Dependencies

• Pico SDK
  • Relatively involved setup process for this
• arm-none-eabi toolchain
• CMake

Building

• cmake -B build -DPICO_BOARD=pico_w
• cmake --build build

Additional cmake Flags:

• -DMQTT_BROKER_IP
  • Specifies the location of your mqtt broker
• -DCMAKE_EXPORT_COMPILE_COMMANDS
  • Outputs compile_commands.json
• -DCMAKE_BUILD_TYPE=Debug
  • Includes debug symbols in output so application can be debugged with gdb/openocd/picoprobe

neovim lsp help

Because this was a pain point for me :)

• Have clangd installed and set up in neovim
• Run the initial cmake command with the -DCMAKE_EXPORT_COMPILE_COMMANDS flag
• Symlink the output compile commands to the root of the repo
  • ln -s build/compile_commands.json ./compile_commands.json
• Create the following .clangd file (.gitignored already) in the root of the repo

If:
  PathMatch: .*\.c$|.*\.h$
CompileFlags:
  Add: [
    "-isystem/usr/arm-none-eabi/include/"
  ]