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();

    log::info!("Hello world!");
}
esp:0
esp:1
esp:2
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esp:35
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esp:48
esp:3V3.1
esp:3V3.2
esp:RST
esp:5V
esp:GND.1
esp:GND.2
esp:TX
esp:RX
esp:GND.3
esp:GND.4