43 lines
1.7 KiB
Python
Executable File
43 lines
1.7 KiB
Python
Executable File
#!/usr/bin/env python3
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from time import sleep
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from sys import exit
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import minimalmodbus
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import serial
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slave_address = 254
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instrument = minimalmodbus.Instrument('/dev/rs485', slave_address, close_port_after_each_call=True) # port name, slave address (in decimal)
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instrument.serial.baudrate = 19200
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instrument.serial.bytesize = 8
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instrument.serial.parity = serial.PARITY_EVEN
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instrument.serial.stopbits = 1
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instrument.serial.timeout = 0.05 # seconds
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instrument.mode = minimalmodbus.MODE_RTU # rtu or ascii mode
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instrument.clear_buffers_before_each_transaction = True
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print('---- Reading from input registers ----')
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# read
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CO2_addr = 9
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CO2 = instrument.read_register(CO2_addr, 1, functioncode=4) * 10
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T_SHT4x_addr = 10
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T_SHT4x = instrument.read_register(T_SHT4x_addr, 1, functioncode=4)
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RH_SHT4x_addr = 11
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RH_SHT4x = instrument.read_register(RH_SHT4x_addr, 1, functioncode=4) * 10
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T_SCD4x_addr = 12
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T_SCD4x = instrument.read_register(T_SCD4x_addr, 1, functioncode=4)
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RH_SCD4x_addr = 13
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RH_SCD4x = instrument.read_register(RH_SCD4x_addr, 1, functioncode=4) * 10
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T_SHT4x_signed_addr = 14
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T_SHT4x_signed = instrument.read_register(T_SHT4x_signed_addr, 1, functioncode=4, signed=True)
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T_SCD4x_signed_addr = 15
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T_SCD4x_signed = instrument.read_register(T_SCD4x_signed_addr, 1, functioncode=4, signed=True)
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print(f'[{CO2_addr+30001}] CO2:\t\t{CO2} ppm')
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print(f'[{T_SHT4x_addr+30001}] T_SHT4x:\t{T_SHT4x} deg C')
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print(f'[{RH_SHT4x_addr+30001}] RH_SHT4x:\t{RH_SHT4x} %')
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print(f'[{T_SCD4x_addr+30001}] T_SCD4x:\t{T_SCD4x} deg C')
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print(f'[{RH_SCD4x_addr+30001}] RH_SCD4x:\t{RH_SCD4x} %')
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print(f'[{T_SHT4x_signed_addr+30001}] T_SHT4x_signed:\t{T_SHT4x_signed} deg C')
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print(f'[{T_SCD4x_signed_addr+30001}] T_SCD4x_signed:\t{T_SCD4x_signed} deg C')
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print('---- DONE ----')
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exit(0)
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