Keyestudio Ks0428, Manual

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Car_right(); //robot turns right
delay(500);
Car_front(); ///go forward
} } }
else //If the front distance is greater than or equal to 20cm,
robot car will go front
{
Car_front(); //go forward
}
// receive the Bluetooth value to end the obstacle avoidance
function
if (Serial.available())
{
bluetooth_val = Serial.read();
if (bluetooth_val == 'S') //receive S
{
flag = 1; //when assign 1 to flag, end loop
}}}}
/*******************Follow****************/
void follow() {
flag = 0;
while (flag == 0) {