Example Code for Arduino-Serial Passive (Temperature Read)

Hardware Preparation

• Arduino board: Quantity1
• URM37 V5.0 ultrasonic sensor (SKU:SEN0001): Quantity1
• Jumper wires: Quantity several

Software Preparation

• Arduino IDE: Download from Arduino official website

Wiring Diagram

Follow the wiring method described in the test on software section (connect TX/RX,5V,GND).

Other Preparation Work

1. Ensure the sensor's serial level is set to TTL mode (default) using the button method described in Getting Started section.
2. Connect the hardware as per the wiring instructions.

Sample Code

// # Editor     : roker
// # Date       : 05.03.2018
// # Product name: URM V5.0 ultrasonic sensor
// # Product SKU : SEN0001
// # Version     : 1.0
// # Description:
// # The sketch for using the URM37 Serial  mode from DFRobot
// #   and writes the values to the serialport
// # Connection:
// #       Vcc (Arduino)      -> Pin 1 VCC (URM V5.0)
// #       GND (Arduino)      -> Pin 2 GND (URM V5.0)
// #       Pin TX1 (Arduino)  -> Pin 8 RXD (URM V5.0)
// #       Pin RX0 (Arduino)  -> Pin 9 TXD (URM V5.0)
// # Working Mode: Serial  Mode.
uint8_t EnTempCmd[4] = {0x11, 0x00, 0x00, 0x11}; // temperature measure command
uint8_t TempData[4];
unsigned int TempValue = 0;
void setup()
{
  Serial.begin(9600);
  delay(100);
  Serial.println("Init the sensor");
}
void loop()
{
  SerialCmd();
  delay(200);
}
void SerialCmd()
{
  int i;
  for (i = 0; i < 4; i++) {
    Serial.write(EnTempCmd[i]);
  }
  while (Serial.available() > 0)  // if received data
  {
    for (i = 0; i < 4; i++) {
      TempData[i] = Serial.read();
    }  
    TempValue = TempData[1] << 8;
    TempValue = TempValue + TempData[2];
    Serial.print("temperature : ");
    Serial.print(TempValue, DEC);
    Serial.println(" oC");
  }
}

Result

This temperature was magnified10 times, in the test, actual tempreture is28.1 degrees Celsius.