oled shows temp correctly

thermo_sensor/main/thermo_sensor.c

@@ -1,6 +1,8 @@
+#include <stdio.h>
 #include <freertos/FreeRTOS.h>
 #include <freertos/task.h>
 #include <esp_system.h>
+#include <esp_timer.h>
 
 #include "nvs_flash.h"
 #include "esp_http_server.h"
@@ -21,17 +23,32 @@ static lv_display_t *sh_display = NULL;
 static lv_obj_t *label = NULL;
 bmp280_t dev_bmp_280;
 
-void main_loop(void *pvParameters) {
+static void lvgl_tick_cb(void *arg) {
+    lv_tick_inc(10);
+}
+
+void lvgl_task(void *pvParameters) {
+    while (1) {
+        lv_timer_handler();
+        vTaskDelay(pdMS_TO_TICKS(10));
+    }
+}
+
+void sensor_task(void *pvParameters) {
     // Wait 1s, to avoid corrupted first sensor readout
     vTaskDelay(pdMS_TO_TICKS(1000));
     while (1) {
-        lv_timer_handler();
         ygg_bmp280_read_sensor(&dev_bmp_280);
+        // Najpierw OLED, potem (blokujący) HTTP — żeby ekran
+        // odświeżył się nawet gdy serwer nie odpowiada.
+        char buf[32];
+        snprintf(buf, sizeof(buf), "Temp: %.2f C",
+                 CURR_READOUT.temperature);
+        ygg_set_display_label(sh_display, label, buf);
         ygg_send_sensor_readouts(BASE_URL,
                                  SENSOR_NAME,
                                  CURR_READOUT);
         vTaskDelay(pdMS_TO_TICKS(10000));
-        ygg_set_display_label(sh_display, label, "ANOTHER");
     }
 }
 
@@ -65,11 +82,22 @@ void app_main()
     ESP_ERROR_CHECK(i2cdev_init());
     
     sh_display = ygg_sh1106_init();
+    // LVGL potrzebuje regularnego ticka, inaczej redraw nigdy się nie wykona
+    // (to był powód, dla którego wisiało "FIRST").
+    const esp_timer_create_args_t lvgl_tick_args = {
+        .callback = lvgl_tick_cb,
+        .name = "lvgl_tick",
+    };
+    esp_timer_handle_t lvgl_tick_handle = NULL;
+    ESP_ERROR_CHECK(esp_timer_create(&lvgl_tick_args, &lvgl_tick_handle));
+    ESP_ERROR_CHECK(esp_timer_start_periodic(lvgl_tick_handle, 10 * 1000));
+
     lv_obj_t *scr = lv_display_get_screen_active(sh_display);
     label = lv_label_create(scr);
     ygg_set_display_label(sh_display, label, "FIRST");
 
     ygg_bmp280_init(&dev_bmp_280);
-    xTaskCreatePinnedToCore(main_loop, "bmp280_test", configMINIMAL_STACK_SIZE * 8, NULL, 5, NULL, APP_CPU_NUM);
+    xTaskCreatePinnedToCore(lvgl_task, "lvgl", 4096, NULL, 4, NULL, APP_CPU_NUM);
+    xTaskCreatePinnedToCore(sensor_task, "bmp280_test", 8192, NULL, 5, NULL, APP_CPU_NUM);
 }
 

thermo_sensor/main/ygg_sh1106.c

@@ -53,12 +53,8 @@ static void example_lvgl_flush_cb(lv_display_t *disp, const lv_area_t *area, uin
         }
     }
     // pass the draw buffer to the driver
-    ESP_LOGI("FLUSH",
-         "area: (%d,%d)-(%d,%d), display: %dx%d",
-         x1, y1, x2, y2,
-         lv_display_get_horizontal_resolution(disp),
-         lv_display_get_vertical_resolution(disp));
     esp_lcd_panel_draw_bitmap(panel_handle, x1, y1, x2 + 1, y2 + 1, oled_buffer);
+    lv_display_flush_ready(disp);
 }
 
 lv_display_t* ygg_sh1106_init() {
@@ -139,9 +135,10 @@ lv_display_t* ygg_sh1106_init() {
     return display;
 }
 
-void ygg_set_display_label(lv_display_t *display, lv_obj_t *label, char *str) {
+void ygg_set_display_label(lv_display_t *display, lv_obj_t *label, const char *str) {
     lv_label_set_text(label, str);
     /* Size of the screen (if you use rotation 90 or 270, please use lv_display_get_vertical_resolution) */
     lv_obj_set_width(label, lv_display_get_horizontal_resolution(display));
+    lv_obj_set_style_text_align(label, LV_TEXT_ALIGN_CENTER, 0);
     lv_obj_align(label, LV_ALIGN_TOP_MID, 0, 0);
 }

thermo_sensor/main/ygg_sh1106.h

@@ -4,6 +4,6 @@
 #include "lvgl.h"
 
 lv_display_t* ygg_sh1106_init();
-void ygg_set_display_label(lv_display_t *display, lv_obj_t *label, char *str);
+void ygg_set_display_label(lv_display_t *display, lv_obj_t *label, const char *str);
 
 #endif