CMakeLists.txt

@@ -4,7 +4,5 @@
 # CMakeLists in this exact order for cmake to work correctly
 cmake_minimum_required(VERSION 3.5)
 
-set(EXTRA_COMPONENT_DIRS $ENV{IDF_PATH}/examples/common_components/led_strip)
-
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 project(display-ambient-light-board)

main/CMakeLists.txt

@@ -1,2 +1,2 @@
-idf_component_register(SRCS "hw-ms03.c" "app_nvs.c" "apds_9960.c" "pca9555.c" "i2c.c" "asr_pro.c" "ci_03t.c" "ui_input.c" "ambient_light.c" "temperature.c" "embedded_display.c" "mqtt.c" "main.c" "wifi.c" "light.c" "mqtt.c"
+idf_component_register(SRCS "hw-ms03.c" "app_nvs.c" "apds_9960.c" "pca9555.c" "i2c.c" "asr_pro.c" "ci_03t.c" "ui_input.c" "ambient_light.c" "temperature.c" "embedded_display.c" "mqtt.c" "main.c" "wifi.c" "light.c" "mqtt.c" "led_strip_encoder/led_strip_encoder.c"
                     INCLUDE_DIRS ".")

main/ambient_light.c

@@ -120,9 +120,9 @@ void ambient_light_fetch(void* arg) {
   uint16_t als_ch0_raw;
   uint16_t als_ch1_raw;
   uint16_t proximity_raw;
-  char als_ch0_str[10];
-  char als_ch1_str[10];
-  char proximity_str[10];
+  char als_ch0_str[20];
+  char als_ch1_str[20];
+  char proximity_str[20];
   uint8_t als_ch0_buffer[] = {0, 0};
   uint8_t als_ch1_buffer[] = {0, 0};
   uint8_t proximity_buffer[] = {0, 0};

main/apds_9960.c

@@ -6,6 +6,7 @@
 #include "driver/i2c.h"
 #include "embedded_display.c"
 #include "esp_log.h"
+#include "esp_timer.h"
 #include "freertos/FreeRTOS.h"
 #include "i2c.c"
 
@@ -128,7 +129,7 @@
 
 #define APDS_9960_TAG "APDS-9960"
 
-static xQueueHandle apds_9960_int_evt_queue = NULL;
+static QueueHandle_t apds_9960_int_evt_queue = NULL;
 
 static int64_t last_apds_9960_int_time = 0;
 

main/i2c.c

@@ -54,7 +54,7 @@ uint8_t i2c_check_slave_exists(uint8_t address) {
   i2c_master_start(cmd);
   i2c_master_write_byte(cmd, (address << 1) | I2C_MASTER_WRITE, ACK_CHECK_EN);
   i2c_master_stop(cmd);
-  esp_err_t ret = i2c_master_cmd_begin(I2C_NUM_0, cmd, 50 / portTICK_RATE_MS);
+  esp_err_t ret = i2c_master_cmd_begin(I2C_NUM_0, cmd, 50 / portTICK_PERIOD_MS);
   i2c_cmd_link_delete(cmd);
 
   if (ret == ESP_OK) {

main/led_strip_encoder/led_strip_encoder.c

@@ -0,0 +1,141 @@
+/*
+ * SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "led_strip_encoder.h"
+
+#include "esp_check.h"
+
+static const char *TAG = "led_encoder";
+
+typedef struct {
+  rmt_encoder_t base;
+  rmt_encoder_t *bytes_encoder;
+  rmt_encoder_t *copy_encoder;
+  int state;
+  rmt_symbol_word_t reset_code;
+} rmt_led_strip_encoder_t;
+
+static size_t rmt_encode_led_strip(rmt_encoder_t *encoder,
+                                   rmt_channel_handle_t channel,
+                                   const void *primary_data, size_t data_size,
+                                   rmt_encode_state_t *ret_state) {
+  rmt_led_strip_encoder_t *led_encoder =
+      __containerof(encoder, rmt_led_strip_encoder_t, base);
+  rmt_encoder_handle_t bytes_encoder = led_encoder->bytes_encoder;
+  rmt_encoder_handle_t copy_encoder = led_encoder->copy_encoder;
+  rmt_encode_state_t session_state = 0;
+  rmt_encode_state_t state = 0;
+  size_t encoded_symbols = 0;
+  switch (led_encoder->state) {
+    case 0:  // send RGB data
+      encoded_symbols += bytes_encoder->encode(
+          bytes_encoder, channel, primary_data, data_size, &session_state);
+      if (session_state & RMT_ENCODING_COMPLETE) {
+        led_encoder->state =
+            1;  // switch to next state when current encoding session finished
+      }
+      if (session_state & RMT_ENCODING_MEM_FULL) {
+        state |= RMT_ENCODING_MEM_FULL;
+        goto out;  // yield if there's no free space for encoding artifacts
+      }
+    // fall-through
+    case 1:  // send reset code
+      encoded_symbols +=
+          copy_encoder->encode(copy_encoder, channel, &led_encoder->reset_code,
+                               sizeof(led_encoder->reset_code), &session_state);
+      if (session_state & RMT_ENCODING_COMPLETE) {
+        led_encoder->state = 0;  // back to the initial encoding session
+        state |= RMT_ENCODING_COMPLETE;
+      }
+      if (session_state & RMT_ENCODING_MEM_FULL) {
+        state |= RMT_ENCODING_MEM_FULL;
+        goto out;  // yield if there's no free space for encoding artifacts
+      }
+  }
+out:
+  *ret_state = state;
+  return encoded_symbols;
+}
+
+static esp_err_t rmt_del_led_strip_encoder(rmt_encoder_t *encoder) {
+  rmt_led_strip_encoder_t *led_encoder =
+      __containerof(encoder, rmt_led_strip_encoder_t, base);
+  rmt_del_encoder(led_encoder->bytes_encoder);
+  rmt_del_encoder(led_encoder->copy_encoder);
+  free(led_encoder);
+  return ESP_OK;
+}
+
+static esp_err_t rmt_led_strip_encoder_reset(rmt_encoder_t *encoder) {
+  rmt_led_strip_encoder_t *led_encoder =
+      __containerof(encoder, rmt_led_strip_encoder_t, base);
+  rmt_encoder_reset(led_encoder->bytes_encoder);
+  rmt_encoder_reset(led_encoder->copy_encoder);
+  led_encoder->state = 0;
+  return ESP_OK;
+}
+
+esp_err_t rmt_new_led_strip_encoder(const led_strip_encoder_config_t *config,
+                                    rmt_encoder_handle_t *ret_encoder) {
+  esp_err_t ret = ESP_OK;
+  rmt_led_strip_encoder_t *led_encoder = NULL;
+  ESP_GOTO_ON_FALSE(config && ret_encoder, ESP_ERR_INVALID_ARG, err, TAG,
+                    "invalid argument");
+  led_encoder = calloc(1, sizeof(rmt_led_strip_encoder_t));
+  ESP_GOTO_ON_FALSE(led_encoder, ESP_ERR_NO_MEM, err, TAG,
+                    "no mem for led strip encoder");
+  led_encoder->base.encode = rmt_encode_led_strip;
+  led_encoder->base.del = rmt_del_led_strip_encoder;
+  led_encoder->base.reset = rmt_led_strip_encoder_reset;
+  // different led strip might have its own timing requirements, following
+  // parameter is for WS2812
+  rmt_bytes_encoder_config_t bytes_encoder_config = {
+      .bit0 =
+          {
+              .level0 = 1,
+              .duration0 = 0.3 * config->resolution / 1000000,  // T0H=0.3us
+              .level1 = 0,
+              .duration1 = 0.9 * config->resolution / 1000000,  // T0L=0.9us
+          },
+      .bit1 =
+          {
+              .level0 = 1,
+              .duration0 = 0.9 * config->resolution / 1000000,  // T1H=0.9us
+              .level1 = 0,
+              .duration1 = 0.3 * config->resolution / 1000000,  // T1L=0.3us
+          },
+      .flags.msb_first = 1  // WS2812 transfer bit order: G7...G0R7...R0B7...B0
+  };
+  ESP_GOTO_ON_ERROR(
+      rmt_new_bytes_encoder(&bytes_encoder_config, &led_encoder->bytes_encoder),
+      err, TAG, "create bytes encoder failed");
+  rmt_copy_encoder_config_t copy_encoder_config = {};
+  ESP_GOTO_ON_ERROR(
+      rmt_new_copy_encoder(&copy_encoder_config, &led_encoder->copy_encoder),
+      err, TAG, "create copy encoder failed");
+
+  uint32_t reset_ticks = config->resolution / 1000000 * 50 /
+                         2;  // reset code duration defaults to 50us
+  led_encoder->reset_code = (rmt_symbol_word_t){
+      .level0 = 0,
+      .duration0 = reset_ticks,
+      .level1 = 0,
+      .duration1 = reset_ticks,
+  };
+  *ret_encoder = &led_encoder->base;
+  return ESP_OK;
+err:
+  if (led_encoder) {
+    if (led_encoder->bytes_encoder) {
+      rmt_del_encoder(led_encoder->bytes_encoder);
+    }
+    if (led_encoder->copy_encoder) {
+      rmt_del_encoder(led_encoder->copy_encoder);
+    }
+    free(led_encoder);
+  }
+  return ret;
+}

main/led_strip_encoder/led_strip_encoder.h

@@ -0,0 +1,38 @@
+/*
+ * SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#pragma once
+
+#include <stdint.h>
+
+#include "driver/rmt_encoder.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Type of led strip encoder configuration
+ */
+typedef struct {
+  uint32_t resolution; /*!< Encoder resolution, in Hz */
+} led_strip_encoder_config_t;
+
+/**
+ * @brief Create RMT encoder for encoding LED strip pixels into RMT symbols
+ *
+ * @param[in] config Encoder configuration
+ * @param[out] ret_encoder Returned encoder handle
+ * @return
+ *      - ESP_ERR_INVALID_ARG for any invalid arguments
+ *      - ESP_ERR_NO_MEM out of memory when creating led strip encoder
+ *      - ESP_OK if creating encoder successfully
+ */
+esp_err_t rmt_new_led_strip_encoder(const led_strip_encoder_config_t *config,
+                                    rmt_encoder_handle_t *ret_encoder);
+
+#ifdef __cplusplus
+}
+#endif

main/light.c

@@ -1,28 +1,22 @@
-/* RMT example -- RGB LED Strip
-
-   This example code is in the Public Domain (or CC0 licensed, at your option.)
-
-   Unless required by applicable law or agreed to in writing, this
-   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-   CONDITIONS OF ANY KIND, either express or implied.
-*/
 #pragma once
-#include "driver/rmt.h"
+#include <string.h>
+
+#include "driver/rmt_tx.h"
 #include "esp_log.h"
 #include "esp_system.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
-#include "led_strip.h"
+#include "led_strip_encoder/led_strip_encoder.h"
 #include "nvs.h"
 #include "nvs_flash.h"
 #include "sdkconfig.h"
 
 static const char *LIGHT_TAG = "DisplayAmbientLight_Light";
 
-#define RMT_TX_CHANNEL RMT_CHANNEL_0
 #define RMT_TX_GPIO 1
 #define STRIP_LED_NUMBER CONFIG_NUMBER_OF_LEDS
 #define EXAMPLE_CHASE_SPEED_MS (10)
+#define RMT_LED_STRIP_RESOLUTION_HZ 10000000
 
 typedef enum light_mode_e {
   light_mode_init = 0,
@@ -34,7 +28,13 @@ typedef enum light_mode_e {
   light_mode_off = 6,
 } light_mode_t;
 
-led_strip_t *light_led_strip;
+rmt_channel_handle_t led_chan = NULL;
+static uint8_t led_strip_pixels[STRIP_LED_NUMBER * 3];
+rmt_encoder_handle_t led_encoder = NULL;
+rmt_transmit_config_t tx_config = {
+    .loop_count = 0,  // no transfer loop
+};
+
 light_mode_t light_mode;
 float display_ambient_light_brightness = 1;
 uint8_t display_ambient_lighting_level = 255;
@@ -179,52 +179,53 @@ void led_strip_hsv2rgb(uint32_t h, uint32_t s, uint32_t v, uint32_t *r,
   }
 }
 
-void update_desktop_connection_state() {
-  static uint8_t tick = 0;
+// void update_desktop_connection_state() {
+//   static uint8_t tick = 0;
 
-  bool beat = tick / 10 % 2 ? 1 : 0;
+//   bool beat = tick / 10 % 2 ? 1 : 0;
 
-  switch (light_mode) {
-    case light_mode_desktop_online:
-      if (beat) {
-        ESP_ERROR_CHECK(
-            light_led_strip->set_pixel(light_led_strip, 0, 10, 10, 10));
-      }
-      ESP_ERROR_CHECK(
-          light_led_strip->set_pixel(light_led_strip, 1, 10, 10, 10));
-      ESP_ERROR_CHECK(
-          light_led_strip->set_pixel(light_led_strip, 2, 10, 10, 10));
-      break;
-    case light_mode_mqtt_connected:
-      if (beat) {
-        ESP_ERROR_CHECK(
-            light_led_strip->set_pixel(light_led_strip, 0, 10, 10, 10));
-        ESP_ERROR_CHECK(
-            light_led_strip->set_pixel(light_led_strip, 1, 10, 10, 10));
-      }
-      ESP_ERROR_CHECK(
-          light_led_strip->set_pixel(light_led_strip, 2, 22, 22, 22));
-      break;
-    case light_mode_idle:
-      if (beat) {
-        ESP_ERROR_CHECK(
-            light_led_strip->set_pixel(light_led_strip, 0, 77, 77, 77));
-        ESP_ERROR_CHECK(
-            light_led_strip->set_pixel(light_led_strip, 1, 77, 77, 77));
-        ESP_ERROR_CHECK(
-            light_led_strip->set_pixel(light_led_strip, 2, 77, 77, 77));
-      }
-      break;
-    default:
-      break;
-  }
+//   switch (light_mode) {
+//     case light_mode_desktop_online:
+//       if (beat) {
+//         led_strip_pixels[0] = 0;
+//         led_strip_pixels[1] = 0;
+//         led_strip_pixels[2] = 0;
+//       }
+//       led_strip_pixels[3] = 10
+//       break;
+//     case light_mode_mqtt_connected:
+//       if (beat) {
+//         ESP_ERROR_CHECK(
+//             light_led_strip->set_pixel(light_led_strip, 0, 10, 10, 10));
+//         ESP_ERROR_CHECK(
+//             light_led_strip->set_pixel(light_led_strip, 1, 10, 10, 10));
+//       }
+//       ESP_ERROR_CHECK(
+//           light_led_strip->set_pixel(light_led_strip, 2, 22, 22, 22));
+//       break;
+//     case light_mode_idle:
+//       if (beat) {
+//         ESP_ERROR_CHECK(
+//             light_led_strip->set_pixel(light_led_strip, 0, 77, 77, 77));
+//         ESP_ERROR_CHECK(
+//             light_led_strip->set_pixel(light_led_strip, 1, 77, 77, 77));
+//         ESP_ERROR_CHECK(
+//             light_led_strip->set_pixel(light_led_strip, 2, 77, 77, 77));
+//       }
+//       break;
+//     default:
+//       break;
+//   }
 
-  tick++;
-}
+//   tick++;
+// }
 
 void light_for_init() {
   ESP_LOGI(LIGHT_TAG, "light_for_init");
-  ESP_ERROR_CHECK(light_led_strip->clear(light_led_strip, 100));
+
+  memset(led_strip_pixels, 0, sizeof(led_strip_pixels));
+  ESP_ERROR_CHECK(rmt_transmit(led_chan, led_encoder, led_strip_pixels,
+                               sizeof(led_strip_pixels), &tx_config));
 
   nvs_handle local_nvs_handle;
   esp_err_t err = nvs_open("storage", NVS_READWRITE, &local_nvs_handle);
@@ -273,10 +274,13 @@ void light_for_init() {
       init_b = (uint8_t)(b_f * (float)i);
 
       for (int j = 0; j < STRIP_LED_NUMBER; j++) {
-        ESP_ERROR_CHECK(light_led_strip->set_pixel(light_led_strip, j, init_r,
-                                                   init_g, init_b));
+        led_strip_pixels[j * 3 + 0] = init_g;
+        led_strip_pixels[j * 3 + 1] = init_r;
+        led_strip_pixels[j * 3 + 2] = init_b;
       }
-      ESP_ERROR_CHECK(light_led_strip->refresh(light_led_strip, 100));
+
+      ESP_ERROR_CHECK(rmt_transmit(led_chan, led_encoder, led_strip_pixels,
+                                   sizeof(led_strip_pixels), &tx_config));
       vTaskDelay(pdMS_TO_TICKS(20));
     }
     vTaskDelay(pdMS_TO_TICKS(100));
@@ -292,19 +296,34 @@ void light_for_connecting_wifi() {
   int8_t tick_tock = 0;
 
   do {
-    ESP_ERROR_CHECK(
-        light_led_strip->set_pixel(light_led_strip, tick_tock, 150, 150, 0));
-    ESP_ERROR_CHECK(light_led_strip->set_pixel(light_led_strip,
-                                               (tick_tock + 1) % 2, 0, 200, 0));
-    ESP_ERROR_CHECK(light_led_strip->refresh(light_led_strip, 100));
+    if (tick_tock) {
+      led_strip_pixels[0] = 150;
+      led_strip_pixels[1] = 150;
+      led_strip_pixels[2] = 0;
+      led_strip_pixels[3] = 200;
+      led_strip_pixels[4] = 0;
+      led_strip_pixels[5] = 0;
+    } else {
+      led_strip_pixels[0] = 200;
+      led_strip_pixels[1] = 0;
+      led_strip_pixels[2] = 0;
+      led_strip_pixels[3] = 150;
+      led_strip_pixels[4] = 150;
+      led_strip_pixels[5] = 0;
+    }
     tick_tock = !tick_tock;
+    ESP_ERROR_CHECK(rmt_transmit(led_chan, led_encoder, led_strip_pixels,
+                                 sizeof(led_strip_pixels), &tx_config));
     vTaskDelay(pdMS_TO_TICKS(200));
   } while (light_mode == light_mode_connection_wifi);
 }
 
 void light_for_idle() {
   ESP_LOGI(LIGHT_TAG, "light_for_idle");
-  ESP_ERROR_CHECK(light_led_strip->clear(light_led_strip, 100));
+
+  memset(led_strip_pixels, 0, sizeof(led_strip_pixels));
+  ESP_ERROR_CHECK(rmt_transmit(led_chan, led_encoder, led_strip_pixels,
+                               sizeof(led_strip_pixels), &tx_config));
 
   uint32_t red = 0, green = 0, blue = 0;
   uint16_t step_length = 360 / STRIP_LED_NUMBER;
@@ -318,24 +337,23 @@ void light_for_idle() {
       // Build RGB values
       led_strip_hsv2rgb(hue, 50, 30, &red, &green, &blue);
 
-      red = red * display_ambient_light_brightness * led_strip_red_calibration;
-      green = green * display_ambient_light_brightness *
+      led_strip_pixels[j * 3 + 0] = green * display_ambient_light_brightness *
                                     led_strip_green_calibration;
-      blue =
+      led_strip_pixels[j * 3 + 1] =
+          red * display_ambient_light_brightness * led_strip_red_calibration;
+      led_strip_pixels[j * 3 + 2] =
           blue * display_ambient_light_brightness * led_strip_blue_calibration;
-      // Write RGB values to strip driver
-      ESP_ERROR_CHECK(
-          light_led_strip->set_pixel(light_led_strip, j, red, green, blue));
     }
-    update_desktop_connection_state();
-    ESP_ERROR_CHECK(light_led_strip->refresh(light_led_strip, 100));
+    // update_desktop_connection_state();
+    ESP_ERROR_CHECK(rmt_transmit(led_chan, led_encoder, led_strip_pixels,
+                                 sizeof(led_strip_pixels), &tx_config));
     vTaskDelay(pdMS_TO_TICKS(10));
   }
 }
 
 void light_strip_running_task(void *pv_parameters) {
   while (true) {
-    if (!light_led_strip) {
+    if (!led_chan) {
       ESP_LOGE(LIGHT_TAG, "install WS2812 driver failed 2");
     }
     switch (light_mode) {
@@ -359,24 +377,28 @@ void light_strip_running_task(void *pv_parameters) {
 }
 
 void light_init_strip() {
-  rmt_config_t config = RMT_DEFAULT_CONFIG_TX(RMT_TX_GPIO, RMT_TX_CHANNEL);
-  // set counter clock to 40MHz
-  config.clk_div = 2;
+  rmt_tx_channel_config_t tx_chan_config = {
+      .clk_src = RMT_CLK_SRC_DEFAULT,  // select source clock
+      .gpio_num = RMT_TX_GPIO,
+      .mem_block_symbols =
+          64,  // increase the block size can make the LED less flickering
+      .resolution_hz = RMT_LED_STRIP_RESOLUTION_HZ,
+      .trans_queue_depth = 4,  // set the number of transactions that can be
+                               // pending in the background
+  };
+  ESP_ERROR_CHECK(rmt_new_tx_channel(&tx_chan_config, &led_chan));
 
-  ESP_ERROR_CHECK(rmt_config(&config));
-  ESP_ERROR_CHECK(rmt_driver_install(config.channel, 0, 0));
+  ESP_LOGI(LIGHT_TAG, "Install led strip encoder");
 
-  // install ws2812 driver
-  led_strip_config_t strip_config = LED_STRIP_DEFAULT_CONFIG(
-      STRIP_LED_NUMBER, (led_strip_dev_t)config.channel);
-  light_led_strip = led_strip_new_rmt_ws2812(&strip_config);
-  if (!light_led_strip) {
-    ESP_LOGE(LIGHT_TAG, "install WS2812 driver failed");
-  }
-  // Clear LED strip (turn off all LEDs)
-  ESP_ERROR_CHECK(light_led_strip->clear(light_led_strip, 100));
-  // Show simple rainbow chasing pattern
-  ESP_LOGI(LIGHT_TAG, "LED Rainbow Chase Start");
+  led_strip_encoder_config_t encoder_config = {
+      .resolution = RMT_LED_STRIP_RESOLUTION_HZ,
+  };
+  ESP_ERROR_CHECK(rmt_new_led_strip_encoder(&encoder_config, &led_encoder));
+
+  ESP_LOGI(LIGHT_TAG, "Enable RMT TX channel");
+  ESP_ERROR_CHECK(rmt_enable(led_chan));
+
+  ESP_LOGI(LIGHT_TAG, "Start LED rainbow chase");
 
   light_mode = light_mode_init;
 
@@ -404,8 +426,9 @@ void light_play_colors(uint16_t len, uint8_t *buffer) {
     if (r <= 7 && g <= 7 && b <= 7) {
       black_count++;
     }
-    ESP_ERROR_CHECK(
-        light_led_strip->set_pixel(light_led_strip, led_index, r, g, b));
+    led_strip_pixels[led_index * 3 + 0] = g;
+    led_strip_pixels[led_index * 3 + 1] = r;
+    led_strip_pixels[led_index * 3 + 2] = b;
   }
 
   if (black_count > STRIP_LED_NUMBER / 5 * 4) {
@@ -416,12 +439,14 @@ void light_play_colors(uint16_t len, uint8_t *buffer) {
             b = (uint8_t)((float)20 * display_ambient_light_brightness *
                           led_strip_blue_calibration);
     for (uint16_t led_index = 0; led_index < STRIP_LED_NUMBER; led_index++) {
-      ESP_ERROR_CHECK(
-          light_led_strip->set_pixel(light_led_strip, led_index, r, g, b));
+      led_strip_pixels[led_index * 3 + 0] = g;
+      led_strip_pixels[led_index * 3 + 1] = r;
+      led_strip_pixels[led_index * 3 + 2] = b;
     }
-  } else {
   }
-  ESP_ERROR_CHECK(light_led_strip->refresh(light_led_strip, 100));
+
+  ESP_ERROR_CHECK(rmt_transmit(led_chan, led_encoder, led_strip_pixels,
+                               sizeof(led_strip_pixels), &tx_config));
   vTaskDelay(pdMS_TO_TICKS(10));
 }
 

main/mqtt.c

@@ -52,7 +52,7 @@
 static const char *MQTT_TAG = "DisplayAmbientLight_MQTT";
 
 static EventGroupHandle_t s_mqtt_event_group;
-static xQueueHandle mqtt_cmd_event = NULL;
+static QueueHandle_t mqtt_cmd_event = NULL;
 static esp_mqtt_client_handle_t client = NULL;
 
 typedef struct colors {
@@ -69,8 +69,8 @@ static void log_error_if_nonzero(const char *message, int error_code) {
 }
 
 static void mqtt_event_handler(void *handler_args, esp_event_base_t base,
-                               int32_t event_id, void *event_data) {
-  ESP_LOGD(MQTT_TAG, "Event dispatched from event loop base=%s, event_id=%d",
+                               long event_id, void *event_data) {
+  ESP_LOGD(MQTT_TAG, "Event dispatched from event loop base=%s, event_id=%ld",
            base, event_id);
   esp_mqtt_event_handle_t event = event_data;
   client = event->client;
@@ -195,7 +195,7 @@ static void mqtt_app_start() {
   xTaskCreate(mqtt_cmd_event_handler, "mqtt_cmd_event", 2048, NULL, 10, NULL);
 
   const esp_mqtt_client_config_t mqtt_cfg = {
-      .uri = MQTT_BROKER_URL,
+      .broker.address.uri = MQTT_BROKER_URL,
   };
   esp_mqtt_client_handle_t client = esp_mqtt_client_init(&mqtt_cfg);
   esp_mqtt_client_register_event(client, ESP_EVENT_ANY_ID, mqtt_event_handler,

main/temperature.c

@@ -22,7 +22,7 @@
 void fetch_temperature(void* arg) {
   esp_err_t error;
   float temperature = DEFAULT_TEMPERATURE;
-  char temperature_str[10];
+  char temperature_str[20];
   uint8_t temperature_buffer[] = {0, 0};
   display_fill_rect(0, 0, 128, 2, 0x00);
   for (;;) {

main/ui_input.c

@@ -34,8 +34,8 @@
 
 static const char *UI_INPUT_TAG = "UiInput";
 
-static xQueueHandle ui_input_event = NULL;
-static xQueueHandle ui_input_raw_event = NULL;
+static QueueHandle_t ui_input_event = NULL;
+static QueueHandle_t ui_input_raw_event = NULL;
 
 typedef struct encoder_state {
   e_ui_input_raw_key_t key;
@@ -51,7 +51,6 @@ static encoder_state_t encoder_1_state = {.key = ui_input_raw_key_encoder_1,
 
 uint8_t level_byte;
 int8_t delta = 0;
-char changing_str[12] = "NC";
 
 static void IRAM_ATTR gpio_isr_handler(void *arg) {
   xQueueSendFromISR(ui_input_raw_event, NULL, NULL);
@@ -59,7 +58,7 @@ static void IRAM_ATTR gpio_isr_handler(void *arg) {
 
 static void ui_input_update_embedded_display(void *arg) {
   s_ui_input_t input;
-  char changing_str[12] = "NC";
+  char changing_str[20] = "NC";
   for (;;) {
     if (xQueueReceive(ui_input_event, &input, portMAX_DELAY)) {
       switch (input.key) {