mrtims / moist

A soil moisture sensor built on the STM32F429I Disco, using a set of 4 DFRobot capacitive soil moisture sensors

moist

moist is a soil moisture sensor built on the STM32F429I-DISC discovery board. Written in Rust in an attempt to get a feel for the language and ecosystem, while attempting to keep my chillies healthy at the same time.

Status

Often getting things up and running, with up-to-date dependencies is the hardest part. So if you're reading this looking for a recently updated starting point for the STM32F429I Disco, this should hopefully be a good start. I'll endeavour to periodically keep it up-to-date with the latest combination of interoperable dependencies.

Note that the standard cargo build and cargo run will fail as cargo will attempt to build the STM32F4 target for Windows. Instead, there are aliases provided in the .cargo/config.toml to build, run, and test parts of this package with the correct target. This could be addressed but only by depending on unstable cargo features, which I have chosen not to do.

DIY - Simulation

You can build and run a simulated version by running

cargo run-simulation

This requires SDL2 for the embedded-graphics-simulator which can be installed following the instructions at that link, according to your operating system.

DIY - On Target

To run this yourself, you will need to install a few things, which you can get by following the instructions in the Embedded Rust Book

Then, running it should be as simple as plugging it in, and then running in two command line windows, both in the root directory:

openocd

in one window, and

cargo run-stm32f429

in the other. --release may also be added to load the release binary instead, which results in a major speedup for drawing to the LCD.

cortex-debug is also set up for VSCode, so it can be debugged out of the box. I haven't hooked up ITM so there will be no stdout, and panics will just freeze the screen.

License

MIT license.