IT WOOORKS!!

firmware/src/main.rs

@@ -1,14 +1,10 @@
-use anyhow::{bail, Result};
-use esp_idf_svc::eventloop::EspSystemEventLoop;
-use esp_idf_svc::hal::prelude::Peripherals;
-use log::info;
-
-fn main() -> Result<()> {
+fn main() {
+    // It is necessary to call this function once. Otherwise some patches to the runtime
+    // implemented by esp-idf-sys might not link properly. See https://github.com/esp-rs/esp-idf-template/issues/71
     esp_idf_svc::sys::link_patches();
+
+    // Bind the log crate to the ESP Logging facilities
     esp_idf_svc::log::EspLogger::initialize_default();
 
-    let peripherals = Peripherals::take().unwrap();
-    let sysloop = EspSystemEventLoop::take()?;
-
-    info!("Hello, world!");
+    log::info!("Hello, world!");
 }