Esp32/esp32 i2c scanner
From Federal Burro of Information
< Esp32
/*********
Rui Santos Complete project details at https://randomnerdtutorials.com
- /
- include <Adafruit_NeoPixel.h>
- include <Wire.h>
- define I2C_SDA 0
- define I2C_SCL 1
- define PIN 8 // On Trinket or Gemma, suggest changing this to 1
- define NUMPIXELS 1 // Popular NeoPixel ring size
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
void setup() {
Wire.begin(I2C_SDA, I2C_SCL); Serial.begin(115200); Serial.println("\nI2C Scanner"); pixels.begin();
}
void loop() {
pixels.clear(); pixels.show(); // pixels.setPixelColor(0, pixels.Color(0, i, 0)); 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);
}