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Final code for the arduino with i2c connection. LSB to 1 Byte

Arduino_i2c.ino

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+#include <Wire.h> // I2C-Headerdatei
+
+const int adcPin = A0; // ADC-Pin
+//const int toggleDelay = 0.1; // Verzögerung zwischen dem Umschalten der Bits, in Mikrosekunden
+const int bufferSize = 8 * sizeof(uint32_t);
+
+void setup() {
+  Wire.begin(8); // I2C-Verbindung initialisieren
+  analogReadResolution(12);
+  //Serial.begin(9600);
+  
+  //Wire.onReceive(receiveData);
+  //Wire.onRequest(sendData);
+
+}
+
+/*void sendData() {
+  Wire.write(0xFF);
+  Serial.write(0xFF);
+}
+
+void receiveData(int count) {
+  Serial.write('r');
+}*/
+
+void loop() {
+  uint32_t buffer[8] = {0};
+  uint8_t bitCount = 0;
+
+  for (int i = 0; i < 8; i++) {
+    uint32_t randomValue = 0;
+    
+    while (bitCount < 32) {
+      uint16_t adcValue = analogRead(adcPin);
+      uint32_t newBit = adcValue & 0x01;
+      randomValue = (randomValue << 1) | newBit;
+      bitCount++;
+      //delay(toggleDelay);
+    }
+  
+    buffer[i] = randomValue;
+    bitCount = 0;
+  }
+
+  Wire.beginTransmission(8); // I2C-Übertragung an Geräteadresse 8 starten
+  for (int i = 0; i < 8; i++) {
+    Wire.write((byte*)&buffer[i], sizeof(buffer[i])); // Daten über I2C-Bus senden
+  }
+  Wire.endTransmission(); // I2C-Übertragung beenden */
+}