From 6045406ea17f4c7c51951a29a9eb53bd6ddb449e Mon Sep 17 00:00:00 2001
From: Jet Pham <jetthomaspham@gmail.com>
Date: Wed, 1 Oct 2025 23:16:50 -0700
Subject: [PATCH] feat: make LED blink

---
 README.md       | 22 ++++++++++++++++++++++
 src/bin/main.rs | 24 +++++++++++++++++++-----
 2 files changed, 41 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index e012bf1..fb759d6 100644
--- a/README.md
+++ b/README.md
@@ -25,3 +25,25 @@ On September 30, 2025, a few Noisebridgers got together and started to hack on t
 </p>
 
 > We used Kirkland Vodka to clean flux after soldering header pins
+
+## Setup
+
+This project requires Nix for development. Follow these steps to set up the development environment:
+
+1. Install Nix if you haven't already:
+   - Follow the installation instructions at [nixos.org](https://nixos.org/download.html)
+
+2. Enter the development environment:
+   ```bash
+   nix develop
+   ```
+
+## Running
+
+To run the project:
+
+```bash
+sudo cargo run --release
+```
+
+**Note:** The `sudo` command is required for accessing the USB serial port on most Linux systems.
diff --git a/src/bin/main.rs b/src/bin/main.rs
index f38be46..8c68063 100644
--- a/src/bin/main.rs
+++ b/src/bin/main.rs
@@ -8,8 +8,9 @@
 
 use defmt::info;
 use esp_hal::clock::CpuClock;
+use esp_hal::delay::Delay;
+use esp_hal::gpio::{Level, Output, OutputConfig};
 use esp_hal::main;
-use esp_hal::time::{Duration, Instant};
 use esp_hal::timer::timg::TimerGroup;
 use panic_rtt_target as _;
 
@@ -32,12 +33,25 @@ fn main() -> ! {
 
     let timg0 = TimerGroup::new(peripherals.TIMG0);
     let _init = esp_wifi::init(timg0.timer0, esp_hal::rng::Rng::new(peripherals.RNG)).unwrap();
+    
+    let mut led = Output::new(peripherals.GPIO15, Level::Low, OutputConfig::default());
+
+    // Initialize delay
+    let delay = Delay::new();
+
+    info!("Starting LED blink program on GPIO15...");
 
     loop {
-        info!("Hello world!");
-        let delay_start = Instant::now();
-        while delay_start.elapsed() < Duration::from_millis(500) {}
+        // Turn LED on
+        led.set_high();
+        info!("LED ON");
+        delay.delay_millis(1000);
+        
+        // Turn LED off
+        led.set_low();
+        info!("LED OFF");
+        delay.delay_millis(1000);
     }
-
+    
     // for inspiration have a look at the examples at https://github.com/esp-rs/esp-hal/tree/esp-hal-v1.0.0-rc.0/examples/src/bin
 }