Initial Checkin

.cargo/config.toml

@@ -0,0 +1,16 @@
+[target.xtensa-esp32-none-elf]
+runner = "espflash flash --monitor"
+
+
+[env]
+ESP_LOG="info"
+
+[build]
+rustflags = [
+  "-C", "link-arg=-nostartfiles",
+]
+
+target = "xtensa-esp32-none-elf"
+
+[unstable]
+build-std = ["core"]  

.gitignore

@@ -0,0 +1,13 @@
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+.env*
+.vscode*

Cargo.toml

@@ -0,0 +1,48 @@
+[package]
+name = "esp-lora-send"
+version = "0.1.0"
+authors = ["Iain (Bill) Wiseman <iwiseman@bibble.co.nz>"]
+edition = "2021"
+license = "MIT OR Apache-2.0"
+
+[dependencies]
+esp-backtrace = { version = "0.14.2", features = [
+    "esp32",
+    "exception-handler",
+    "panic-handler",
+    "println",
+] }
+
+esp-hal = { version = "0.23.1", features = [ "esp32" ] }
+esp-println = { version = "0.12.0", features = ["esp32", "log"] }
+
+esp-hal-embassy = { version = "0.6.0", features = ["esp32"] }
+
+embassy-executor    = { version = "0.7.0", features = ["task-arena-size-20480"] }
+embassy-futures     = "0.1.1"
+embassy-sync        = "0.6.0"
+embassy-time        = "0.4.0"
+embassy-embedded-hal = "0.3.0"
+
+static_cell         = { version = "2.1.0", features = ["nightly"] }
+
+log = { version = "0.4.22" }
+lora-phy = "3.0.1"
+fugit               = "0.3.7"
+
+embedded-graphics = "0.8.1"
+ssd1306 = "0.10.0"
+
+[profile.dev]
+# Rust debug is too slow.
+# For debug builds always builds with some optimization
+opt-level = "s"
+
+[profile.release]
+codegen-units = 1 # LLVM can perform better optimizations using a single thread
+debug = 2
+debug-assertions = false
+incremental = false
+lto = 'fat'
+opt-level = 's'
+overflow-checks = false

LICENSE-APACHE

@@ -0,0 +1,201 @@
+                              Apache License
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+
+APPENDIX: How to apply the Apache License to your work.
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+Copyright 2021-2024 esp-rs
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

LICENSE-MIT

@@ -0,0 +1,25 @@
+Copyright 2021-2024 esp-rs
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

README.md

@@ -0,0 +1,68 @@
+# ESP Embassy LoRa Project
+
+Welcome to the **ESP Embassy LoRa** project! This is a working example of how to configure an AP using embassy.
+
+## Features
+
+## Features
+
+- Demonstrates LoRa sending and receiving functionality.
+- Tested on a LoRa32 T3 v1.6.1 board.
+- Adapted for the SX1276 module in New Zealand.
+- Includes integration with an SSD1306 display for send and receive status.
+- Based on the [lora-rs project](https://github.com/lora-rs/lora-rs/tree/main/examples/esp32).
+
+ 
+## Requirements
+- [espup](https://github.com/esp-rs/espup) for setting up the ESP32 Rust environment.
+- [Rust](https://www.rust-lang.org/) (latest stable version recommended).
+- A LoRa32 T3 v1.6.1 board with an SX1276 LoRa module.
+- An SSD1306-compatible display (optional, for status updates).
+
+## Installation
+
+1. Clone the repository:
+    ```bash
+    git clone https://github.com/bibble235/esp-lora.git
+    ```
+
+2. Navigate to the project directory:
+    ```bash
+    cd esp-lora
+    ```
+
+## Usage
+
+1. For receiving
+
+Build and run the application with the receiver application:
+```bash
+ESPFLASH_PORT=/dev/ttyACM0 cargo run --bin receive
+```
+
+2. For sending 
+
+Build and run the application with the send application:
+```bash
+ESPFLASH_PORT=/dev/ttyACM1 cargo run --bin send
+```
+
+## License
+
+This project is licensed under the MIT License. See the [LICENSE](LICENSE) file for details.
+
+## Demonstration
+
+Below is a screenshot of a Lora32 T3 v1.6.1 running this application:
+
+![Screenshot of a Lora32 T3 v1.6.1 running this app.](./assets/images/two_loras.jpg)
+
+## Contact
+
+For questions or feedback, please contact [iwiseman@bibble.co.nz](mailto:iwiseman@bibble.co.nz).
+
+---
+
+![Rust](https://img.shields.io/badge/Rust-Language-black?logo=rust&logoColor=white)
+![ESP32](https://img.shields.io/badge/ESP32-Microcontroller-blue)
+![LoRa](https://img.shields.io/badge/LoRa-Wireless-green?logo=wifi&logoColor=white)

build.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("cargo:rustc-link-arg-bins=-Tlinkall.x");
+    }

rust-toolchain.toml

@@ -0,0 +1,2 @@
+[toolchain]
+channel = "esp"

src/bin/receive.rs

@@ -0,0 +1,209 @@
+//! It demonstrates LORA P2P send functionality.
+//! And is based of the example in https://github.com/lora-rs/lora-rs
+#![no_std]
+#![no_main]
+
+mod shared;
+
+use esp_backtrace as _;
+use esp_println::println;
+
+use embassy_time::{Duration, Timer};
+
+use embassy_executor::Spawner;
+use embassy_sync::{blocking_mutex::raw::CriticalSectionRawMutex, mutex::Mutex};
+use embassy_time::Delay;
+
+use esp_hal::gpio::{Input, Level, Output, Pull};
+use esp_hal::spi::{master::Config, master::Spi, Mode};
+use esp_hal::Async;
+use esp_hal::{clock::CpuClock, timer::timg::TimerGroup};
+
+use fugit::RateExtU32;
+use static_cell::StaticCell;
+
+use lora_phy::iv::GenericSx127xInterfaceVariant;
+use lora_phy::mod_params::{Bandwidth, CodingRate, SpreadingFactor};
+use lora_phy::sx127x::{Sx1276, Sx127x};
+use lora_phy::{sx127x, LoRa};
+
+use lora_phy::RxMode;
+
+const LORA_FREQUENCY_IN_HZ: u32 = 923_200_000; // WARNING: Set this appropriately for the region
+
+static SPI_BUS: StaticCell<
+    Mutex<CriticalSectionRawMutex, esp_hal::spi::master::Spi<'static, Async>>,
+> = StaticCell::new();
+
+#[esp_hal_embassy::main]
+async fn main(_spawner: Spawner) {
+    // Initialize line number for logging
+    let mut line_number = 0;
+
+    // Initialize the logger
+    esp_println::logger::init_logger_from_env();
+    println!("Starting LoRa P2P example");
+
+    // Set up ESP32
+    let peripherals = esp_hal::init(esp_hal::Config::default().with_cpu_clock(CpuClock::max()));
+    let timer_group = TimerGroup::new(peripherals.TIMG0);
+
+    esp_hal_embassy::init(timer_group.timer1);
+    println!("Send Embassy initialized");
+
+    // Initialize the display
+    let mut display =
+        match shared::Display::new(peripherals.I2C0, peripherals.GPIO22, peripherals.GPIO21) {
+            Ok(display) => display,
+            Err(err) => {
+                println!("Error initializing display: {:?}", err);
+                return;
+            }
+        };
+        
+    // Initialize the SPI bus
+    let nss = Output::new(peripherals.GPIO18, Level::Low);
+    let sclk = peripherals.GPIO5;
+    let mosi = peripherals.GPIO27;
+    let miso = peripherals.GPIO19;
+
+    // Initialize the sx127x radio pins
+    let mut reset = Output::new(peripherals.GPIO23, Level::Low);
+    let dio1 = Input::new(peripherals.GPIO26, Pull::None);
+    println!("Pins Initialized");
+
+    let spi = Spi::new(
+        peripherals.SPI2,
+        Config::default()
+            .with_frequency(100.kHz())
+            .with_mode(Mode::_0),
+    )
+    .unwrap()
+    .with_sck(sclk)
+    .with_mosi(mosi)
+    .with_miso(miso)
+    .into_async();
+
+    // Initialize the static SPI bus
+    let spi_bus = SPI_BUS.init(Mutex::new(spi));
+    let spi_device = embassy_embedded_hal::shared_bus::asynch::spi::SpiDevice::new(spi_bus, nss);
+
+    // reset.set_low();
+    // Timer::after(Duration::from_millis(10)).await;
+    // reset.set_high();
+    // Timer::after(Duration::from_millis(10)).await;
+
+    println!("Receive SPI Initialized");
+
+    // We use Sx1276
+    // Create the SX126x configuration
+    let sx127x_config = sx127x::Config {
+        chip: Sx1276,     // Specify the SX1276 chip
+        tcxo_used: false, // The LoRa32 T3 v1.6.1 uses a crystal oscillator, not a TCXO
+        tx_boost: true,   // Use PA_BOOST for higher transmit power (depends on board layout)
+        rx_boost: true,
+    };
+    println!("Send SX127x configuration created");
+
+    // Create the radio instance
+    let iv = match GenericSx127xInterfaceVariant::new(reset, dio1, None, None) {
+        Ok(interface) => interface,
+        Err(err) => {
+            println!("Error creating GenericSx127xInterfaceVariant: {:?}", err);
+            return;
+        }
+    };
+
+    // Create the LoRa instance
+    let mut lora = match LoRa::new(Sx127x::new(spi_device, iv, sx127x_config), false, Delay).await {
+        Ok(lora_instance) => lora_instance,
+        Err(err) => {
+            println!("Error creating LoRa instance: {:?}", err);
+            return;
+        }
+    };
+
+    println!("Receive Radio Initialized");
+
+    let mut receiving_buffer = [00u8; 100];
+
+    let modulation_params = {
+        match lora.create_modulation_params(
+            SpreadingFactor::_10,
+            Bandwidth::_125KHz,
+            CodingRate::_4_8,
+            LORA_FREQUENCY_IN_HZ,
+        ) {
+            Ok(mp) => {
+                println!("Modulation parameters created successfully");
+                mp
+            }
+            Err(err) => {
+                println!("Error creating modulation parameters: {:?}", err);
+                return;
+            }
+        }
+    };
+
+    display.write_text(line_number, "setup successful");
+    line_number = line_number + 1;
+    Timer::after(Duration::from_millis(200)).await;
+
+    let rx_packet_params = {
+        match lora.create_rx_packet_params(
+            4,
+            false,
+            receiving_buffer.len() as u8,
+            true,
+            false,
+            &modulation_params,
+        ) {
+            Ok(pp) => pp,
+            Err(err) => {
+                println!("Radio error = {:?}", err);
+                return;
+            }
+        }
+    };
+
+    match lora
+        .prepare_for_rx(RxMode::Continuous, &modulation_params, &rx_packet_params)
+        .await
+    {
+        Ok(()) => {
+            display.write_text(line_number, "preparing successful");
+            line_number = line_number + 1;
+            Timer::after(Duration::from_millis(200)).await;
+        }
+        Err(err) => {
+            println!("Radio error = {:?}", err);
+            return;
+        }
+    };
+
+    let expected_msg = b"hello";
+    let expected_msg_len = expected_msg.len();
+
+    println!("Receive going into loop");
+
+    loop {
+        receiving_buffer = [00u8; 100];
+        match lora.rx(&rx_packet_params, &mut receiving_buffer).await {
+            Ok((received_len, _rx_pkt_status)) => {
+                if (received_len == expected_msg_len as u8)
+                    && (receiving_buffer[..expected_msg_len] == *expected_msg)
+                {
+                    display.write_text(line_number, "receive successful");
+                    line_number = 0;
+                    println!(
+                        "rx successful: {:?}",
+                        core::str::from_utf8(&receiving_buffer[..received_len as usize]).unwrap()
+                    );
+                } else {
+                    println!("rx unknown packet");
+                }
+            }
+            Err(err) => println!("rx unsuccessful = {:?}", err),
+        }
+    }
+}

src/bin/send.rs

@@ -0,0 +1,181 @@
+//! It demonstrates LORA P2P send functionality.
+//! And is based of the example in https://github.com/lora-rs/lora-rs
+#![no_std]
+#![no_main]
+
+mod shared;
+
+use embassy_embedded_hal::shared_bus::asynch::spi::SpiDevice;
+use esp_backtrace as _;
+use esp_hal::peripherals::Peripherals;
+use esp_println::println;
+
+use embassy_executor::Spawner;
+use embassy_sync::{blocking_mutex::raw::CriticalSectionRawMutex, mutex::Mutex};
+use embassy_time::Delay;
+
+use esp_hal::gpio::{Input, Level, Output, Pull};
+use esp_hal::spi::{master::Config, master::Spi, Mode};
+use esp_hal::{clock::CpuClock, timer::timg::TimerGroup};
+use esp_hal::{peripheral, Async};
+
+use fugit::RateExtU32;
+use static_cell::StaticCell;
+
+use lora_phy::iv::GenericSx127xInterfaceVariant;
+use lora_phy::mod_params::{Bandwidth, CodingRate, SpreadingFactor};
+use lora_phy::sx127x::{Sx1276, Sx127x};
+use lora_phy::{sx127x, LoRa};
+
+const LORA_FREQUENCY_IN_HZ: u32 = 923_200_000; // WARNING: Set this appropriately for the region
+
+static SPI_BUS: StaticCell<
+    Mutex<CriticalSectionRawMutex, esp_hal::spi::master::Spi<'static, Async>>,
+> = StaticCell::new();
+
+#[esp_hal_embassy::main]
+async fn main(_spawner: Spawner) {
+    // Initialize line number for logging
+    let mut line_number = 0;
+
+    // Initialize the logger
+    esp_println::logger::init_logger_from_env();
+    println!("Starting LoRa P2P example");
+
+    // Set up ESP32
+    let peripherals = esp_hal::init(esp_hal::Config::default().with_cpu_clock(CpuClock::max()));
+    let timer_group = TimerGroup::new(peripherals.TIMG0);
+
+    esp_hal_embassy::init(timer_group.timer1);
+    println!("Send Embassy initialized");
+
+    // Initialize the display
+    let mut display =
+        match shared::Display::new(peripherals.I2C0, peripherals.GPIO22, peripherals.GPIO21) {
+            Ok(display) => display,
+            Err(err) => {
+                println!("Error initializing display: {:?}", err);
+                return;
+            }
+        };
+        
+    // Initialize the SPI bus
+    let nss = Output::new(peripherals.GPIO18, Level::Low);
+    let sclk = peripherals.GPIO5;
+    let mosi = peripherals.GPIO27;
+    let miso = peripherals.GPIO19;
+
+    // // Initialize the sx127x radio pins
+    let mut reset = Output::new(peripherals.GPIO23, Level::Low);
+    let dio0 = Input::new(peripherals.GPIO26, Pull::None);
+    println!("Pins Initialized");
+
+    let spi = Spi::new(
+        peripherals.SPI2,
+        Config::default()
+            .with_frequency(200.kHz())
+            .with_mode(Mode::_0),
+    )
+    .unwrap()
+    .with_sck(sclk)
+    .with_mosi(mosi)
+    .with_miso(miso)
+    .into_async();
+
+    // Initialize the static SPI bus
+    let spi_bus = SPI_BUS.init(Mutex::new(spi));
+    let spi_device = embassy_embedded_hal::shared_bus::asynch::spi::SpiDevice::new(spi_bus, nss);
+
+    println!("Send SPI initialized");
+
+    // Create the SX127x configuration
+    let sx127x_config = sx127x::Config {
+        chip: Sx1276,     // Specify the SX1276 chip
+        tcxo_used: false, // The LoRa32 T3 v1.6.1 uses a crystal oscillator, not a TCXO
+        tx_boost: true,   // Use PA_BOOST for higher transmit power (depends on board layout)
+        rx_boost: true,
+    };
+    println!("Send SX127x configuration created");
+
+    // Create the radio instance
+    let iv = match GenericSx127xInterfaceVariant::new(reset, dio0, None, None) {
+        Ok(interface) => interface,
+        Err(err) => {
+            println!("Error creating GenericSx127xInterfaceVariant: {:?}", err);
+            return;
+        }
+    };
+
+    // Create the LoRa instance
+    let mut lora = match LoRa::new(Sx127x::new(spi_device, iv, sx127x_config), false, Delay).await {
+        Ok(lora_instance) => lora_instance,
+        Err(err) => {
+            println!("Error creating LoRa instance: {:?}", err);
+            return;
+        }
+    };
+
+    let modulation_params = {
+        match lora.create_modulation_params(
+            SpreadingFactor::_10,
+            Bandwidth::_125KHz,
+            CodingRate::_4_8,
+            LORA_FREQUENCY_IN_HZ,
+        ) {
+            Ok(mp) => mp,
+            Err(err) => {
+                println!("Radio error = {:?}", err);
+                return;
+            }
+        }
+    };
+
+    println!("Send Modulation parameters created");
+
+    let mut tx_packet_params = {
+        match lora.create_tx_packet_params(4, false, true, false, &modulation_params) {
+            Ok(pp) => pp,
+            Err(err) => {
+                println!("Radio error = {:?}", err);
+                return;
+            }
+        }
+    };
+
+    let buffer = b"hello";
+
+    display.write_text(line_number, "buffer creation successful");
+    line_number = line_number + 1;
+
+    match lora
+        .prepare_for_tx(&modulation_params, &mut tx_packet_params, 20, buffer)
+        .await
+    {
+        Ok(()) => {
+            println!("prepare_for_tx successful");
+        }
+        Err(err) => {
+            println!("Radio error = {:?}", err);
+            return;
+        }
+    };
+
+    match lora.tx().await {
+        Ok(()) => {
+            display.write_text(line_number, "send of hello successful");
+            line_number = line_number + 1;
+        }
+        Err(err) => {
+            println!("Radio error = {:?}", err);
+            return;
+        }
+    };
+
+    match lora.sleep(false).await {
+        Ok(()) => {
+            display.write_text(line_number, "sleep successful");
+            line_number = 0;
+        }
+        Err(err) => println!("Sleep unsuccessful = {:?}", err),
+    }
+}

src/bin/shared/display.rs

@@ -0,0 +1,91 @@
+use embedded_graphics::mono_font::ascii::FONT_6X10;
+use embedded_graphics::mono_font::MonoTextStyleBuilder;
+use esp_hal::gpio::interconnect::PeripheralOutput;
+use esp_hal::peripheral::Peripheral;
+use esp_println::println;
+
+use embedded_graphics::mono_font::MonoTextStyle;
+use embedded_graphics::pixelcolor::BinaryColor;
+use embedded_graphics::prelude::Point;
+use embedded_graphics::text::Baseline;
+use embedded_graphics::text::Text;
+use embedded_graphics::Drawable;
+use esp_hal::i2c::master::I2c;
+use esp_hal::Blocking;
+use ssd1306::mode::BufferedGraphicsMode;
+use ssd1306::mode::DisplayConfig;
+use ssd1306::prelude::DisplayRotation;
+use ssd1306::prelude::I2CInterface;
+use ssd1306::size::DisplaySize128x64;
+use ssd1306::I2CDisplayInterface;
+use ssd1306::Ssd1306;
+
+#[derive(Debug)]
+pub enum DisplayError {
+    InitializationError,
+    CommunicationError,
+}
+
+pub struct Display<'a> {
+    display: Ssd1306<
+        I2CInterface<I2c<'a, Blocking>>,
+        DisplaySize128x64,
+        BufferedGraphicsMode<DisplaySize128x64>,
+    >,
+    text_style: MonoTextStyle<'static, BinaryColor>,
+}
+
+impl<'a> Display<'a> {
+    /// Initialize the display with the given I2C pins
+    pub fn new(
+        i2c: impl Peripheral<P = impl esp_hal::i2c::master::Instance> + 'a,
+        scl: impl Peripheral<P = impl PeripheralOutput> + 'a,
+        sda: impl Peripheral<P = impl PeripheralOutput> + 'a,
+    ) -> Result<Display<'a>, DisplayError> {
+        
+        let i2c = I2c::new(i2c, esp_hal::i2c::master::Config::default())
+            .unwrap()
+            .with_scl(scl)
+            .with_sda(sda);
+
+        // let i2c = i2c.with_scl(scl.clone()).with_sda(sda.clone());
+        let interface = I2CDisplayInterface::new(i2c);
+
+        let mut display = Ssd1306::new(interface, DisplaySize128x64, DisplayRotation::Rotate0)
+            .into_buffered_graphics_mode();
+
+        display.init().unwrap();
+
+        // Create the text style
+        let text_style = MonoTextStyleBuilder::new()
+            .font(&FONT_6X10)
+            .text_color(BinaryColor::On)
+            .build();
+
+        Ok(Display {
+            display,
+            text_style,
+        })
+    }
+
+    pub fn clear(&mut self) {
+        // Clear the display
+        self.display.clear_buffer();
+        self.display.flush().unwrap();
+    }
+    /// Write text to the display
+    pub fn write_text(&mut self, line: i32, text: &str) {
+        println!("{}", text);
+
+        Text::with_baseline(
+            text,
+            Point::new(0, line * 16),
+            self.text_style,
+            Baseline::Top,
+        )
+        .draw(&mut self.display)
+        .unwrap();
+
+        self.display.flush().unwrap();
+    }
+}

src/bin/shared/mod.rs

@@ -0,0 +1,3 @@
+pub mod display;
+
+pub use display::Display;