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Get the temperature and the humidity from a XY-MD02 sensor
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| #!/usr/bin/env python | |
| """Get the temperature and the humidity from a XY-MD02 sensor.""" | |
| from pymodbus.client import ModbusSerialClient as ModbusClient | |
| from pymodbus.constants import Endian | |
| from pymodbus.payload import BinaryPayloadDecoder | |
| SERIAL_PORT = "/dev/ttyUSB0" | |
| BAUDRATE = 9600 | |
| SLAVE_ID = 1 | |
| client = ModbusClient(method="rtu", port=SERIAL_PORT, baudrate=BAUDRATE) | |
| client.connect() | |
| def read_data(address): | |
| response = client.read_input_registers(address=address, slave=SLAVE_ID, unit=1) | |
| if response.isError(): | |
| print(f"Error reading data: {response}") | |
| return None | |
| else: | |
| decoder = BinaryPayloadDecoder.fromRegisters( | |
| response.registers, byteorder=Endian.BIG | |
| ) | |
| data = decoder.decode_16bit_int() / 10.0 | |
| return data | |
| if __name__ == "__main__": | |
| try: | |
| # Input register 0x0001 | |
| temperature = read_data(1) | |
| # Input register 0x0002 | |
| humidity = read_data(2) | |
| if temperature is not None: | |
| print(f"Temperature: {temperature} °C") | |
| if humidity is not None: | |
| print(f"Humidity: {humidity} %") | |
| finally: | |
| client.close() |
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