A 1. Low voltage, please recharge all your batteries or replace withnew batteries.
2. Batteries installed in wrong polarity (+/-)
3. Incorrect wring on battery holder or motor.

A The wiring of the motor is connected reversed. Please reconnect.

A Please download WeeeCode software on our website, connectrobot to PC via USB cable, select serial port “COM x" and main-board type in software to start coding your robot.
“Restore Firmware" menu offers different options: “Online Firm-ware" support you make live testing of your program, robot willresponseimmediately; “Factory Firmware" will resume the factoryprogram and settings for your robot; “Mobile Firmware" supportsrobot control and program on WeeeMake APP

A Your computer hasn't installed the driver of the mainboard.Please install driver in WeeeCode software "Help" menu, restartthe robot, and connect to computer again.

A USB power supply can only support chip and sensors in main-board.To drive motors or servos, please connect batteries andswitch on the power button.

A Please:
1. Make sure the distance between Line-following sensor andline-following map is between 1-2cm, this is the best workingrange.
2. Do not use Line-following mode under strong light. Strong lightwill interfere the function of Line-following Sensor.
3. Make sure to use unrefiecting material to make your ownline-following map.

A Please check your wiring, make sure sensors are connected tothe same port with your program in the WeeeCode software.

A Due to the port occupation of ESP32 chip, it will report error ifports 5/12/15 is connected to any electronic modules while main-board turned on (or be powered by USB).Please avoid connectingthose ports while connects mainboard to PC, and finish wiringafter.

A The ELF AlOTK210 mainboard can read microSD card at location/sd/a.wav'.Support only*.wav file, cannot play *.mp3 file.

A We offer customization services to our customer. Please contactus for more detail ingquiry, or email hello@weeemake.com.