Troubleshooting RGB LED Blinking Issue on ESP32-C3

[Micael]

Hello,
I'm facing an issue with blinking the onboard RGB LED on my ESP32-C3-devKitM-1 board. According to the ESP32-C3 guide, the RGB LED is connected to GPIO 8. Although I can successfully make the LED blink using Arduino programming, I'm unable to achieve the same result when using C programming with the idf.py and ESP-IDF Framework. The RGB LED remains unresponsive.


Arduino code:

Code: [Select all] [Expand/Collapse]

1. void setup() {
2.     pinMode(LED_BUILTIN, OUTPUT);
3. }
4.  
5. void loop() {
6.     digitalWrite(LED_BUILTIN, HIGH);
7.     delay(1000);
8.     digitalWrite(LED_BUILTIN, LOW);
9.     delay(1000);
10. }

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C code using ESP-IDF framework:

Code: [Select all] [Expand/Collapse]

1. #define LED_PIN GPIO_NUM_8
2.  
3. void app_main(void){
4.  
5.     gpio_reset_pin(LED_PIN);
6.     gpio_set_direction(LED_PIN, GPIO_MODE_OUTPUT_OD);
7.  
8.     while (1){
9.             gpio_set_level(LED_PIN,1);
10.             vTaskDelay(1000/portTICK_PERIOD_MS);
11.  
12.             gpio_set_level(LED_PIN,0);
13.             vTaskDelay(1000/portTICK_PERIOD_MS);
14.         }
15.  
16. }

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Why is the RGB LED on my ESP32-C3-devKitM-1 board not blinking when I program it using the C programming language and the ESP-IDF Framework, despite being able to successfully achieve the blinking functionality using Arduino?

[ESP_krzychb]

Hello Micael, a series of pulses should be sent to addressable RGB LED to turn individual colors on or off. A single call to gpio_set_level() will send to a GPIO only a single on or off signal. Please check the original blink example from ESP-IDF for a complete code that is using led_strip driver to control addressable LEDs.