Moved the i2c detection into git

README.md

@@ -1,2 +1,7 @@
 # esp32-detect-i2c
 
+## IDE
+Should be able to be put onto an esp32 with for example PlatformIO and ArduinoIDE
+
+### PlattformIO
+A PlatformIO ```platformio.ini``` is included with the uncommented part being for an ```ESP-32D``` and the commented part for ```ESP32-C3```

platformio.ini

@@ -0,0 +1,33 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+; [env:esp32-c3-devkitm-1]
+; platform = espressif32
+; board = esp32-c3-devkitm-1
+; framework = arduino
+
+; monitor_speed = 115200
+
+; build_flags =
+;     -DARDUINO_USB_CDC_ON_BOOT=1
+;     -DARDUINO_USB_MODE=1
+
+[env:esp32dev]
+platform = espressif32
+board = esp32dev
+framework = arduino
+upload_speed = 115200
+monitor_speed = 115200
+
+; Explicit flash settings for stability
+board_build.flash_mode = dio
+board_build.flash_size = 4MB
+board_build.flash_freq = 40m
+

src/detect_icc.cpp

@@ -0,0 +1,37 @@
+#include <Wire.h>
+#include <Arduino.h>
+
+#define SDA_PIN 7 // Blue
+#define SCL_PIN 8 // Green
+
+void setup() {
+  Serial.begin(115200);
+  while (!Serial) { delay(100); }
+
+  Serial.println("I2C Scanner starting...");
+  Wire.begin(SDA_PIN, SCL_PIN); // SDA=7, SCL=8
+}
+
+void loop() {
+  byte error, address;
+  int nDevices = 0;
+
+  Serial.println("Scanning I2C bus...");
+
+  for(address = 1; address < 127; address++ ) {
+    Wire.beginTransmission(address);
+    error = Wire.endTransmission();
+
+    if (error == 0) {
+      Serial.print("I2C device found at 0x");
+      if (address<16) Serial.print("0");
+      Serial.println(address, HEX);
+      nDevices++;
+    }
+  }
+
+  if (nDevices == 0) Serial.println("No I2C devices found\n");
+  else Serial.println("Scan complete\n");
+
+  delay(5000); // repeat every 5 seconds
+}