···11+# This file was automatically generated.
22+33+[default.general]
44+chip = "nRF52840_xxAA"
+201
LICENSE-APACHE
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175175+176176+END OF TERMS AND CONDITIONS
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+21
LICENSE-MIT
···11+MIT License
22+33+Copyright (c) 2025 Sachy.dev
44+55+Permission is hereby granted, free of charge, to any person obtaining a copy
66+of this software and associated documentation files (the "Software"), to deal
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2121+SOFTWARE.
+57
README.md
···11+# Sachy's Parasite
22+33+[`b-parasite`](https://github.com/rbaron/b-parasite), the open source soil moisture and ambient temperature/humidity/light sensor, but in Rust!
44+55+## Notes
66+77+Currently, this project has been tested only with the v2.0 of the sensor, making use of the NRF52840 chip. Other variations have not been used, though this could be added by others should they wish. Also, soil moisture calculations have been calibrated against boards that have had conformal coating applied to the capacitive sensor part of the board and further tweaking my still happen, so YMMV.
88+99+## How to install / Flash to the board
1010+1111+To compile, [you'll the latest rustc compiler](https://www.rust-lang.org/tools/install), `clang` 9.0 or later C compiler (due to C deps in the codebase), and a SWD debug probe to flash with (A Pico Debug Probe flashed with yapico firmware will work). Optional but highly recommended tool for flashing this board is a pogo pin clamp (6 pin version). These can be found cheap on AliExpress.
1212+1313+Once rust is installed, you'll need to use `rustup` to download the `nightly` toolchain with the `thumbv7em-none-eabihf` target:
1414+1515+```
1616+rustup toolchain install nightly
1717+rustup +nightly target install thumbv7em-none-eabihf
1818+```
1919+2020+Additionally, there's also at least one utility needed for compilation, `flip-link`. To install, run:
2121+2222+```
2323+cargo install flip-link
2424+```
2525+2626+For flashing, you'll need `probe-rs`, so be sure to [follow the install instructions here](https://probe.rs/docs/getting-started/installation/). There will be [further setup required after installation](https://probe.rs/docs/getting-started/probe-setup/).
2727+2828+This should be enough to get you all the necessary tools in place for compiling and flashing your b-parasite board. To check everything compiles correctly, `cd` into the `para-firmware` folder and run the following:
2929+3030+```
3131+cargo build
3232+```
3333+3434+This should build the firmware in debug mode and with `defmt` logging in place. To flash and log the debug build, ensure your debug probe is connected to the machine and the board and simply run the command:
3535+3636+```
3737+cargo run
3838+```
3939+4040+This will run the compiler and then execute `probe-rs` to flash the chip with the compiled binary. All of the debug info/symbols are kept on the machine and are not flashed, only the actual executable will be flashed. This allows for very efficient debug logging via `defmt`, which decodes the format using the debug symbols.
4141+4242+To compile and flash without debugging/logging, run:
4343+4444+```
4545+cargo run --release --no-default-features
4646+```
4747+4848+This will ensure all debugging/logging code is not generated, nor any debug symbols. Once `probe-rs` flashes the device, you should see no logging output once the chip begins to run.
4949+5050+## Licenses
5151+5252+Licensed under either of
5353+5454+- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or <http://www.apache.org/licenses/LICENSE-2.0>)
5555+- MIT license ([LICENSE-MIT](LICENSE-MIT) or <http://opensource.org/licenses/MIT>)
5656+5757+at your option and for maximum compatibility with the Rust Ecosystem.
+36
build.rs
···11+//! This build script copies the `memory.x` file from the crate root into
22+//! a directory where the linker can always find it at build time.
33+//! For many projects this is optional, as the linker always searches the
44+//! project root directory -- wherever `Cargo.toml` is. However, if you
55+//! are using a workspace or have a more complicated build setup, this
66+//! build script becomes required. Additionally, by requesting that
77+//! Cargo re-run the build script whenever `memory.x` is changed,
88+//! updating `memory.x` ensures a rebuild of the application with the
99+//! new memory settings.
1010+1111+use std::env;
1212+use std::fs::File;
1313+use std::io::Write;
1414+use std::path::PathBuf;
1515+1616+fn main() {
1717+ // Put `memory.x` in our output directory and ensure it's
1818+ // on the linker search path.
1919+ let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
2020+ File::create(out.join("memory.x"))
2121+ .unwrap()
2222+ .write_all(include_bytes!("memory.x"))
2323+ .unwrap();
2424+ println!("cargo:rustc-link-search={}", out.display());
2525+2626+ // By default, Cargo will re-run a build script whenever
2727+ // any file in the project changes. By specifying `memory.x`
2828+ // here, we ensure the build script is only re-run when
2929+ // `memory.x` is changed.
3030+ println!("cargo:rerun-if-changed=memory.x");
3131+3232+ println!("cargo:rustc-link-arg-bins=--nmagic");
3333+ println!("cargo:rustc-link-arg-bins=-Tlink.x");
3434+ #[cfg(feature = "defmt")]
3535+ println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
3636+}
+7
memory.x
···11+MEMORY
22+{
33+ /* NOTE 1 K = 1 KiBi = 1024 bytes */
44+ /* You must fill in these values for your application */
55+ FLASH : ORIGIN = 0x00000000, LENGTH = 1024K
66+ RAM : ORIGIN = 0x20000000, LENGTH = 256K
77+}
+6
rust-toolchain.toml
···11+# This file was automatically generated.
22+33+[toolchain]
44+channel = "nightly"
55+components = ["rust-src", "rustfmt"]
66+targets = ["thumbv7em-none-eabihf"]