I2C protocol not working

[ankushiot]

Board

ESP32 C6 WROOM 1

Device Description

Unable to detect I2C sensor connected.

Hardware Configuration

No only BME 680 was connected. SDA Pin 6, SCL Pin 7

Version

other

IDE Name

Arduino IDE

Operating System

Windows 11

Flash frequency

40MHz

PSRAM enabled

yes

Upload speed

115200

Description

Unable to detect I2C sensor even I2C scanned doesn't shows anything.

Sketch

Ada Fruit bme680test.ino

Debug Message

Sensor working fine on Arduino Nano

Other Steps to Reproduce

No response

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[P-R-O-C-H-Y]

Hello @ankushiot,
Can you please provide more informations:

• Sketch to reproduce the issue
• Debug log from the sketch -> Set Debug level to "Verbose"
• Arduino core version

Thank you.

[Thieuzor]

Hi! I've got the same issue with the following sketch:

#include <Wire.h>
 
void setup() {
  Wire.begin(21,22,100000);
  Serial.begin(115200);
  Serial.println("\nI2C Scanner");
}
 
void loop() {
  byte error, address;
  int nDevices;
  Serial.println("Scanning...");
  nDevices = 0;
  for(address = 1; address < 127; address++ ) {
    Wire.beginTransmission(address);
    error = Wire.endTransmission();
    if (error == 0) {
      Serial.print("I2C device found at address 0x");
      if (address<16) {
        Serial.print("0");
      }
      Serial.println(address,HEX);
      nDevices++;
    }
    else if (error==4) {
      Serial.print("Unknow error at address 0x");
      if (address<16) {
        Serial.print("0");
      }
      Serial.println(address,HEX);
    }    
  }
  if (nDevices == 0) {
    Serial.println("No I2C devices found\n");
  }
  else {
    Serial.println("done\n");
  }
  delay(5000);          
}

Only on 3.1.x it's not working anymore. I've tested it successfully on previous versions.

[me-no-dev]

Can you try instead of Wire.begin(21,22,100000); to have

Wire.setPins(21, 22);
Wire.begin();

[me-no-dev]

The following code works for me on 3.1.1

#include "Wire.h"

void setup() {
  Serial.begin(115200);
  Wire.setPins(6, 7);
  Wire.begin();
}

void loop() {
  byte error, address;
  int nDevices = 0;

  delay(5000);

  Serial.println("Scanning for I2C devices ...");
  for (address = 0x01; address < 0x7f; address++) {
    Wire.beginTransmission(address);
    error = Wire.endTransmission();
    if (error == 0) {
      Serial.printf("I2C device found at address 0x%02X\n", address);
      nDevices++;
    } else if (error != 2) {
      Serial.printf("Error %d at address 0x%02X\n", error, address);
    }
  }
  if (nDevices == 0) {
    Serial.println("No I2C devices found");
  }
}

[Parsaabasi]

Hi @ankushiot
Do you still need assistance with this?