Initial working Telegram bot, LDR and LED

Arduino/Arduino.ino

@@ -0,0 +1,23 @@
+#define LEDPIN 8
+
+String incomingString;
+
+void setup() {
+  pinMode(LEDPIN, OUTPUT);
+  Serial.begin(9600);
+}
+
+void loop() {
+  if (Serial.available() > 0) {
+    char cmd = Serial.read();
+    if (cmd == 'O') {
+      digitalWrite(LEDPIN, HIGH);  // Open
+    } else if (cmd == 'C') {
+      digitalWrite(LEDPIN, LOW);   // Close
+    } else if (cmd == 'R') {
+      int ldrValue = analogRead(A0);
+      Serial.println(ldrValue);
+    }
+  }
+  delay(50);
+}

Arduino/LDRtest/LDRtest.ino

@@ -0,0 +1,16 @@
+/* LDR test measuring with A0 in middle of 10k Ohm resistor and LDR
+ * +5V ---[ LDR ]---+---[ Resistor ]--- GND
+                 |
+              Analog A0
+*/ 
+
+void setup() {
+  Serial.begin(9600);
+}
+
+void loop() {
+  int value = analogRead(A0);  // Reads value between 0 and 1023
+  Serial.println(value);
+  delay(500);
+}
+