#include SoftwareSerial DebugSerial(2, 3); // RX, TX #define BLYNK_PRINT DebugSerial #include // You should get Auth Token in the Blynk App. // Go to the Project Settings (nut icon). char auth[] = "NXly3MaKFIp3WP28beTj9avnSfNOUpGx"; void setup() { // Debug console DebugSerial.begin(9600); DebugSerial.println("Waiting for connections..."); // Blynk will work through Serial // 9600 is for HC-06. For HC-05 default speed is 38400 // Do not read or write this serial manually in your sketch Serial.begin(9600); Blynk.begin(Serial, auth); } void loop() { Blynk.run(); }