Esp 32 rgb led on and board not working

Official Hardware Nano Family Nano ESP32
1

I don't know what I have done but the board's rgb led now cycles through all colours. If i press it multiple times it starts flashing green. Uploading any code doesn't work. I tried hard resetting it and somehow I made the rgb led stop for a while. I then wanted to test the code, uploaded it and it started again. Also when I put my hand in front of some sensors the rgb led shuts of and one motor rotates (not as intended).

#include <Arduino.h>
#include <ESP32Servo.h>
#include <QTRSensors.h>

#define START D0 //start module

// Define motor A
#define AIN1 D5
#define AIN2 D4
#define PWMA D3
// Define motor B
#define BIN1 D7
#define BIN2 D8
#define PWMB D9
// Define STBY pin
#define STBY D6

// Define senzor pins
#define FRONTLEFT A1
#define FRONT A0
#define FRONTRIGHT A2
#define LEFT A4
#define RIGHT A3
// Define line sensor pins
#define LEFTLINE A6
#define RIGHTLINE A7

// Variable for storage of sensor values
uint16_t SensorValues[5];

// Define sensor pins
#define LEFTSERVO D12
#define RIGHTSERVO D11

// Initialize servos
Servo leftServo;
Servo rightServo;

// Define dip switch pins
#define DIP1 A5
#define DIP2 D13

// Variable for dip switch pins
uint8_t DipPins[] = {A5, D13};
size_t DipSwitchSize = 2;

// Create int value for strategy index
uint8_t strategy_index = 0;

void setup() {
  // Start Module
  pinMode(START, INPUT);

  // Motor A
  pinMode(AIN1, OUTPUT);
  pinMode(AIN2, OUTPUT);
  pinMode(PWMA, OUTPUT);

  // Motor B
  pinMode(BIN1, OUTPUT);
  pinMode(BIN2, OUTPUT);
  pinMode(PWMB, OUTPUT);

  // Motor Driver
  pinMode(STBY, OUTPUT);
  digitalWrite(STBY, HIGH);

  // Distance Sensors
  pinMode(FRONTLEFT, INPUT);
  pinMode(FRONT, INPUT);
  pinMode(FRONTRIGHT, INPUT);
  pinMode(LEFT, INPUT);
  pinMode(RIGHT, INPUT);

  // Line Sensors
  pinMode(LEFTLINE, INPUT);
  pinMode(RIGHTLINE, INPUT);

  // Dip Switch
  pinMode(DIP1, INPUT_PULLUP);
  pinMode(DIP2, INPUT_PULLUP);

  // Attach servo pins
  leftServo.attach(D12);
  rightServo.attach(D11);

  Serial.begin(9600);
}

void loop() {
  uint16_t fl = analogRead(FRONTLEFT);
  uint16_t f = analogRead(FRONT);
  uint16_t fr = analogRead(FRONTRIGHT);
  uint16_t l = analogRead(LEFT);
  uint16_t r = analogRead(RIGHT);

  if (true){
    strategy_index = 0;

    switch (strategy_index){
      case 0:  // Random search

        /*
        if (!leftLine.See()){
          MoveMotors(255, -255);
          delay(200);
        }
        else if (!rightLine.See()){
          MoveMotors(-255, 255);
          delay(200);
        }
        */
        if (fl > 1000 && f > 1000){
          MoveMotors(255, 175);
        }
        else if (f > 1000 && fr > 1000){
          MoveMotors(175, 255);
        }
        else if (fr > 1000){
          MoveMotors(255, 255);
        }
        else if (l > 1200){
          MoveMotors(255, -125);
        }
        else if (r > 1200){
          MoveMotors(-125, 255);
        }
        else {
          MoveMotors(0, 0);
        }

        break;
      case 1:
        // Add strategy code here...
        break;

      // Add more strategies...

      default:
        //Serial.println("Error 001: No strategy for provided strategy index.");
        break;
      
    }
  }
  else {
    MoveMotors(0, 0);
  }
}
uint8_t GetDipValue(uint8_t pins[], size_t BitCount){
  bool values[BitCount];
  for (int i = 0; i < BitCount; i++){
    values[i] = digitalRead(pins[i]);
  }

  return GetBinary(values, BitCount);
}

uint8_t GetBinary(bool values[], size_t BitCount){
  uint8_t total = 0;
  for (int i = 0; i < BitCount; i++){
    total += pow(2, i)*values[i];
  }

  return total;
}

void MoveMotors(int8_t value1, int8_t value2){
  digitalWrite(AIN1, (value1+abs(value1))/2/abs(value1));
  digitalWrite(AIN2, (value1-abs(value1))/2/abs(value1));
  analogWrite(PWMA, abs(value1));
  digitalWrite(BIN1, (value2+abs(value2))/2/abs(value2));
  digitalWrite(BIN2, (value2-abs(value2))/2/abs(value2));
  analogWrite(PWMB, abs(value2));
}
2

Green flash is good.

If an upload fails: Disconnect and reconnect the board. Quit and restart your web browser. I often have to do this a number off times until the board is seen again

If the board keeps resetting: double reset for green, and upload sketch with the watchdog disabled.

Michael

3

Do you have the issue with all sketches or just the test sketch?

4

Hello @uw_ggplayz, the Nano ESP32 has multiple pin numbering modes to keep compatibility with both old Nano boards and ESP32 libraries. You can read all about it in this article.

Not sure if you already did so, but if you haven't, I would suggest you to select Tools > Pin Numbering > By GPIO number in the IDE menus and try again. This should improve functionality with the servo libraries.

Also, agree with @michaelwillems - while it is fading green or blue, you should be able to upload sketches via the normal Upload button. If it happens again, let us know the error you have in more detail. Are you using the IDE or the Cloud Agent to connect to the board?

5 
void MoveMotors(int8_t value1, int8_t value2){
  digitalWrite(AIN1, (value1+abs(value1))/2/abs(value1));
  digitalWrite(AIN2, (value1-abs(value1))/2/abs(value1));
  analogWrite(PWMA, abs(value1));
  digitalWrite(BIN1, (value2+abs(value2))/2/abs(value2));
  digitalWrite(BIN2, (value2-abs(value2))/2/abs(value2));
  analogWrite(PWMB, abs(value2));
}

Error was I was trying to write to a pin directrly using 1 or 0, if i use LOW and HIGH it works now.

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