Add LED for user feedback

.gitignore

@@ -2,6 +2,8 @@ build/
 sdkconfig
 sdkconfig.old
 
+managed_components/
+
 .vscode/
 
 cmake-build-*/

main/CMakeLists.txt

@@ -2,4 +2,5 @@ idf_component_register(SRCS "esp_tunnel.cpp"
                             "app_networking.cpp"
                             "app_serial.cpp"
                             "app_config.cpp"
+                            "app_led.cpp"
                     INCLUDE_DIRS ".")

main/app_led.cpp

@@ -0,0 +1,64 @@
+//
+// Created by erki on 26/06/23.
+//
+
+#include "app_led.hpp"
+
+#include "led_strip.h"
+
+namespace
+{
+
+led_strip_handle_t s_strip;
+bool s_tx_on = false;
+bool s_rx_on = false;
+
+void s_updateStrip()
+{
+  const int red = s_tx_on ? 10 : 0;
+  const int blue = s_rx_on ? 10 : 0;
+
+  led_strip_set_pixel(s_strip, 0, red, 10, blue);
+  led_strip_refresh(s_strip);
+}
+
+}
+
+namespace Led
+{
+
+void setupLed(const gpio_num_t gpio)
+{
+  led_strip_config_t config = {
+    .strip_gpio_num = gpio,
+    .max_leds = 1,
+    .led_pixel_format = LED_PIXEL_FORMAT_GRB,
+    .led_model = LED_MODEL_WS2812,
+    .flags = { 0 }
+  };
+
+  led_strip_rmt_config_t rmt_config = {
+    .clk_src = RMT_CLK_SRC_DEFAULT,
+    .resolution_hz = 10 * 1000 * 1000,
+    .mem_block_symbols = 0,
+    .flags = { 0 }
+  };
+
+  ESP_ERROR_CHECK(led_strip_new_rmt_device(&config, &rmt_config, &s_strip));
+  led_strip_clear(s_strip);
+  s_updateStrip();
+}
+
+void flashRx()
+{
+  s_rx_on = !s_rx_on;
+  s_updateStrip();
+}
+
+void flashTx()
+{
+  s_tx_on = !s_tx_on;
+  s_updateStrip();
+}
+
+}

main/app_led.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <driver/gpio.h>
+
+namespace Led
+{
+
+void setupLed(const gpio_num_t gpio);
+void flashRx();
+void flashTx();
+
+} // namespace Led
+

main/esp_tunnel.cpp

@@ -6,6 +6,7 @@
 #include "app_networking.hpp"
 #include "app_serial.hpp"
 #include "app_config.hpp"
+#include "app_led.hpp"
 
 #include "freertos/FreeRTOS.h"
 #include "freertos/queue.h"
@@ -36,6 +37,8 @@ void s_sendUartData(std::size_t len)
   uart_read_bytes(CONFIG_ESPTNL_UART, tx_buffer.data(), len, 0);
 
   xTimerStop(s_timer, 0);
+  Led::flashTx();
+
   Networking::sendData(tx_buffer, len);
 }
 
@@ -65,9 +68,13 @@ std::size_t s_uartBytesWaiting()
       {
         std::size_t uart_free = 0;
         uart_get_tx_buffer_free_size(CONFIG_ESPTNL_UART, &uart_free);
+
         if (uart_free >= event.rx_length)
         {
           ESP_LOGD(LOG_TAG, "ESP-NOW event: wrote %ull bytes to UART RX.", uart_free);
+
+          Led::flashRx();
+
           const auto& esp_rx_buffer = Networking::getRxBuffer();
           uart_write_bytes(CONFIG_ESPTNL_UART, esp_rx_buffer.data(), event.rx_length);
         }
@@ -151,6 +158,8 @@ extern "C" void app_main(void)
   xQueueAddToSet(s_esp_now_queue, s_queue_set);
   xQueueAddToSet(s_uart_queue, s_queue_set);
 
+  Led::setupLed(GPIO_NUM_8);
+
   ESP_LOGI(LOG_TAG, "Setup completed. Sending hello.");
 
   Networking::sendHello();

main/idf_component.yml

@@ -0,0 +1,2 @@
+dependencies:
+  espressif/led_strip: "^2.0.0"