TinkerC6_XY-MD02.ino

#include <TinkerC6.h>
#include <ModbusMaster.h>

ModbusMaster sensor;

void setup() {
  Serial.begin(115200);

  // Enable I2C Power Output (Sensor ON)
  TinkerC6.Power.enable12V();

  // XY-MD02 init with Modbus slave ID 1
  TinkerC6.RS485.begin(9600, SERIAL_8N1);
  sensor.begin(1, TinkerC6.RS485);
  sensor.preTransmission(TinkerC6_RS485_preTransmission);
  sensor.postTransmission(TinkerC6_RS485_postTransmission);

  // Enable RS485
  TinkerC6.RS485.enable();
}

void loop() {
  uint8_t res = sensor.readInputRegisters(1, 2);
  if (res == sensor.ku8MBSuccess) {
    float t = sensor.getResponseBuffer(0) / 10.0;
    float h = sensor.getResponseBuffer(1) / 10.0;
    Serial.printf("Temp: %.1f *C\tHumi: %.1f %%RH\n", t, h);
  } else {
    Serial.printf("Error Code: %d\n", res);
  }
  delay(1000);
}