I was making great scripts for my laptop ARC windows and figured out how to transfer them all to mobile phone app EZ builder. everything will work just like the laptop but then the robot will hit walls,seems like the ultrasonic sonar does not work in Mobile App? I was reading all night and can't find any example program script for mobile phone on sonar collision avoidance. I do know that the ultrasonic radar is not yet supported but I was almost positive I talked to you guys that some code could still make the sensor work in the phone App? was months ago but at that time I was just concentrating on the Windows radar that worked great. Now my frustration of watching the bot hit walls when I just only want to use phone to control the scripts,has me baffled and I feel really dumb coming here for help when it is likely a very simple code. I did try to add the "Get ping" commands and they do nothing on the phone? tired