A mesh stack written in rust to run on the STM32WL / LoRa-E5 module. Like the LoRaWAN modem software Seed Studio provides with the hardware. This software package will also support a AT command set to interact with the modem. This mesh stack is self forming and self healing. If nodes are mobile, a link is formed and then broken, the mesh is smart enough record a failure and find a better route. Simply point your payload to a node address and all decisions happen under the hood. This software package will also supply GPIO support for radio TX/RX and incoming message ring indication.
LoRa_E5_Package - Main project source.
Rb_Mesh_lib - Sub project crate for all mesh related logic.
I used custom PCB for this development but the "Wio-E5 mini Dev Board" should work just fine.
- Add network discovery retries.
- Improve route managment. Currently store 5 and always delete the oldest.
- Test with more nodes. Have only tested with 2 nodes.
- Add periodic neighbor table transmits. Might want to TX subset/only 3 entries. Maybe one every 10min?
- Add some sort of randomized delay for transmitting. What happens when 3 nodes want to relay a packet? Adding a delay will help stagger packets and theoretically the other nodes will detect TX preambles and block.
General rust/cargo command to initialize project space:
Cargo init RBmesh
General rust/cargo command to build application:
Cargo build --release
Command to load code on platform: requires probe-rs
cargo flash --release --chip STM32WLE5JC
Command to load and debug code on platform: requires probe-rs
cargo embed --release
General rust/cargo command to run tests: (have not added tests yet)
cargo test --features stm32wle5
Dont think I will be able to get this to work. Code is targetted for stm32wl, which doesnt support "test". rust-lang/cargo#6784
Steps needed to test rb_mesh_lib:
- Remove .cargo/config.toml
- cd to ..\rb_mesh_lib\
- Remove
#![no_std]from lib.rs - Remove/config out usage of defmt library.
- Run cmd: cargo test --target=x86_64-pc-windows-msvc
https://jonathanklimt.de/electronics/programming/embedded-rust/rust-on-stm32-2/ https://github.com/stm32-rs/stm32wlxx-hal/blob/main/testsuite/README.md
MSVC toolchain doesnt work with windows:
https://asyncbulbs.blogspot.com/2017/06/workaround-for-rustc-with-new-visual.html
Setup probe-rs:
https://probe.rs/docs/getting-started/installation/
PS ...\Documents\RBmesh> Set-ExecutionPolicy RemoteSigned -scope CurrentUser
PS ...\Documents\RBmesh> irm https://github.com/probe-rs/probe-rs/releases/latest/download/probe-rs-tools-installer.ps1 | iex
https://probe.rs/docs/tools/cargo-flash/
My knock off probe works with this. Does not work with STM programmer software.
probe-rs list to list programmers
[0]: STLink V2 -- 0483:3748:48 (ST-LINK)
3 led unit ID is: 5678875
1 led unit ID is: 5677364
AT+MSEND=5678875,true,1,hello