ESP32-CAM does not boot with DS18B20 on GPIO14
Posted: Sun Feb 02, 2020 2:58 pm
Hello,
i want to use the ESP32-CAM from AI_thinker to monitor my 3D printer enclosure.
I also want to know the temperature within the enclosure.
When i enhance the standard example CameraWebServer with code to read the DS18B20 temp sensor, this compiles without error.
However, the ESP32-CAM does not boot with gpio14 connected to the DS18B20. the gpio14 is pulled up with a 4K7 resistor (ds18b20 requirement).
when i disconnect gpio14, the ESP32-CAM boots
then i connect gpio14, and the ESP32-CAM starts reading the sensor, so the code works.
i am not using any card in the ESP32-CAM
does anyone have an idea why the ESP32-CAM will not boot with gpio14 connected.
Is gpio14 the right io to use? It seems free on the AI_thinker board.
thanks for reading,
Rob
i want to use the ESP32-CAM from AI_thinker to monitor my 3D printer enclosure.
I also want to know the temperature within the enclosure.
When i enhance the standard example CameraWebServer with code to read the DS18B20 temp sensor, this compiles without error.
However, the ESP32-CAM does not boot with gpio14 connected to the DS18B20. the gpio14 is pulled up with a 4K7 resistor (ds18b20 requirement).
when i disconnect gpio14, the ESP32-CAM boots
then i connect gpio14, and the ESP32-CAM starts reading the sensor, so the code works.
i am not using any card in the ESP32-CAM
does anyone have an idea why the ESP32-CAM will not boot with gpio14 connected.
Is gpio14 the right io to use? It seems free on the AI_thinker board.
thanks for reading,
Rob