Example Code for Arduino-Read Temperature (Single)

Hardware Preparation

• DFRduino UNO (or similar) x 1
• URM07-UART Ultrasonic Sensor xn
• M-M/F-M/F-F Jumper wires

Software Preparation

• Arduino IDE Click to Download Arduino IDE from Arduino®

Wiring Diagram

Other Preparation Work

1. With a single URM07 module, a generic device address 0xAB can be used instead if the device address is unknown.
2. Before the power on the URM07 module is not started, set the TX port to high and lower the RX port, and maintaining more than 1s can enable the module parameters to revert to factory settings.
3. After the factory reset, the module can not start normally to enter a normal communication state, the on-board LED light flash with 10Hz. The module starts normally when powered back on.
4. After the module is started, the module on-board LED only lights up the indication during the process of receiving the data and processing, and the LED goes out when in the standby state.

Sample Code

// # Author: [email protected]
// # Date: 20.08.2016
// # Product Name: URM07-UART Ultrasonic Sensor
// # SKU: SEN0153
// # version number: 1.0
// # Code Description: Temperature measurement, the received data is not verified

// # Connection: Arduino LEonardo GPIO Power Supply
// # Pin VCC (URM07 V1.0) -> D3     (Arduino Leonardo)
// # Pin GND (URM07 V1.0) -> D2     (Arduino Leonardo)
// # Pin  RX (URM07 V1.0) -> TX1/D1 (Arduino Leonardo)
// # Pin  TX (URM07 V1.0) -> RX1/D0 (Arduino Leonardo)


#define header_H     0x55 //Header
#define header_L     0xAA //Header
#define device_Addr  0x11 //Address
#define data_Length  0x00 //Data length
#define get_Temp_CMD 0x03 //Command: Read Temperature
#define checksum     (header_H+header_L+device_Addr+data_Length+get_Temp_CMD) //check sum

unsigned char i=0;
int  temperature=0;
unsigned char Rx_DATA[8];
unsigned char CMD[6]={header_H,header_L,device_Addr,data_Length,get_Temp_CMD,checksum}; //Temperature Command package

void setup() {
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  digitalWrite(3, HIGH);   // Ultrasonic Sensor VCC
  digitalWrite(2, LOW);   // Ultrasonic Sensor GND
  Serial1.begin(19200);  // Serial1: Ultrasonic Sensor Communication Serial Port, Baud rate: 19200
  Serial.begin(19200);   // Serial: USB Serial Monitor
}

void loop() {
 for(i=0;i<6;i++){
    Serial1.write(CMD[i]);
    }
 delay(50);  //Wait Data Return
 i=0;
 while (Serial1.available()){  //Read returned Data (Note: Demo is just for Reference , no data verification)
    Rx_DATA[i++]=(Serial1.read());
    }
 temperature=((Rx_DATA[5]<<8)|Rx_DATA[6]);  //Read temperature Value (10 times)
 Serial.print(temperature/10);             //Print Temperature
 Serial.print('.');
 Serial.print(temperature%10);
 Serial.println("C");
}

Result