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@maxpromer
Created December 29, 2020 16:07
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/* Dev by IOXhop.com */
#define DE_RE_PIN 4
#define MODE_SEND HIGH
#define MODE_RECV LOW
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
};
digitalWrite(DE_RE_PIN, MODE_SEND);
Serial2.write(buff, sizeof(buff));
Serial2.flush(); // wait send completed
digitalWrite(DE_RE_PIN, MODE_RECV);
if (Serial2.find("\x01\x04")) {
uint8_t n = Serial2.read();
if (n != 4) {
Serial.println("Error data size");
return;
}
temp = ((uint16_t)(Serial2.read() << 8) | Serial2.read()) / 10.0;
humi = ((uint16_t)(Serial2.read() << 8) | Serial2.read()) / 10.0;
} else {
Serial.println("ERROR Timeout");
return;
}
}
void setup() {
pinMode(DE_RE_PIN, OUTPUT);
digitalWrite(DE_RE_PIN, MODE_RECV);
Serial.begin(115200);
Serial2.begin(9600, SERIAL_8N1, 16, 17); // Rx, Tx
Serial2.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(500);
}
@Arif-F
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Arif-F commented Mar 1, 2022

i save you have code

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