Strange behavior using ESP32 and hall effect sensor

Other Hardware Sensors
1

Hi all,
I have an ESP32 Wroom and when i try to plug a thumb throttle on pin 13 and a push button on pin 27 everithing work fine i succeed to read the hall value but when i press the button the signal of the hall is incorrect it pass to full (10 bit => 4095).
Do you have an explanation on what wrong with my code or my electrical schema? I tried to change the input mode as well but not working also. Every answer is appreciated.

pinMode(27, INPUT);

void loop()
{
   LectureEntree();
}

void LectureEntree()
{
  int sensorValue = 0;
  int i=0;
  for (i=0;i<=20;i++){
   sensorValue =  sensorValue + analogRead(13); 
  }
  throttleIn =(int)(sensorValue/20); 
  Serial.print("Signal of the hall: ");
  Serial.println(throttleIn);
}

VCC

2

Post your complete code.

Pin 27 is floating.
Try putting a resistor (+- 10k) pin 27 to GND.

3

20 * 4096 is too much to fit into an int. It will rollover.
0 to <=20 is 21 readings.
Leo..

unsigned int sensorValue = 0;
for (int i = 0; i < 20; i++) sensorValue += analogRead(13);
throttleIn = sensorValue / 20; 
Serial.print("Signal of the hall: ");
Serial.println(throttleIn);
4

Thank you, you are right. It not change my issue but it will certainly correct another one :stuck_out_tongue:

5

In fact yesterday i change the pin of the hall entry to the 34 pin (ADC1) and it working fine. I don't get why i have this kind of behavior on pin 13

6

GPIO13 can't be used when WiFi is used.
GPIO34 is input only, and doesn't have internal pull up.
You should read this page (click).
Leo..

7

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.