Created
February 14, 2021 07:35
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/* Dev by IOXhop.com */ | |
#include <SoftwareSerial.h> | |
SoftwareSerial mySerial(9, 8); // RX, TX | |
float temp = 0, humi = 0; | |
void readXY_MD02() { | |
uint8_t buff[] = { | |
0x01, // Devices Address | |
0x04, // Function code | |
0x00, // Start Address HIGH | |
0x01, // Start Address LOW | |
0x00, // Quantity HIGH | |
0x02, // Quantity LOW | |
0x20, // CRC LOW | |
0x0B // CRC HIGH | |
}; | |
mySerial.write(buff, sizeof(buff)); | |
mySerial.flush(); // wait MODE_SEND completed | |
delay(200); | |
if (mySerial.find("\x01\x04")) { | |
uint8_t n = mySerial.read(); | |
if (n != 4) { | |
Serial.println("Error data size"); | |
return; | |
} | |
temp = ((uint16_t)(mySerial.read() << 8) | mySerial.read()) / 10.0; | |
humi = ((uint16_t)(mySerial.read() << 8) | mySerial.read()) / 10.0; | |
} else { | |
Serial.println("ERROR Timeout"); | |
return; | |
} | |
} | |
void setup() { | |
Serial.begin(115200); | |
mySerial.begin(9600); // Rx, Tx | |
mySerial.setTimeout(200); | |
} | |
void loop() { | |
readXY_MD02(); | |
Serial.print("Temperature: "); | |
Serial.print(temp); | |
Serial.println(" *C"); | |
Serial.print("Humidity: "); | |
Serial.print(humi); | |
Serial.println(" *C"); | |
delay(300); | |
} |
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