Could you help me please, could you write the begginig of the code. Thanks

Hello, I come back to you because I've try to make the code and I think I'm bad for that. It doesn't work. I've two infrared sensor, one for the left side, the other one for the right. The left sensor is pluged on A2, the right on A3. the code in ultrasonic.h: int Leftsensor=A2; int Rightsensor=A3; void loop() { int Leftdistance = 4800/(analogRead(Leftsensor)-20); //converting in centimeter int Rightdistance = 4800/(analogRead(Rightsensor)-20); if (0 < Leftdistance < 20){ strcpy(newCmd,"sit"); } else if (Leftdistance > 60 or Leftdistance < 0){ strcpy(newCmd,"sit"); } //same for the right side } this code code doesn't work, in addition I would like those instructions work only when Bittle walk forward I hope you will help me

@Rongzhong Li Thanks for all, it will be easier for me now

Thanks for your fast reply, I download the new version of the code, I see what you're talking about but I'm a novice in arduino code. I would programming the robot in way to when the sensor find an obstacle, the robot do an action (trun back or go to the left...) How can I write that in the code. Thanks for your help