Keyestudio ESP32 - 5. Test Result

ESP32 Starter Kit
(continued from previous page)
//Read the signal from the sensor: a high level pulse
//Duration is detected from the point sending "ping" command to the time receiving␣
˓→echo signal (unit: um).
float distance = pulseIn(EchoPin, HIGH) / 58.00; //Convert into distance
delay(10);
return distance; //Return the diatance value
}
void setup() {
Serial.begin(9600);//Set the baud rate to 9600
pinMode(TrigPin, OUTPUT);//Set Trig pin to output
pinMode(EchoPin, INPUT); //Set Echo pin to input
}
void loop() {
distance = checkdistance(); //Assign the read value to "distance"
if (distance < 4 || distance >= 400) { //Display "-1" if exceeding the detection␣
˓→range
distance = -1;
}
Serial.print("ditance: ");
Serial.print(distance);
Serial.println(" CM");
delay(200);
}
5. Test Result
After connecting the wiring and uploading code, open serial monitor to set baud rate to 9600, the serial port prints the
distance value.
8.5. Arduino Project 137