Added measurement script

tests/measure.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+from time import sleep
+from sys import exit
+import minimalmodbus
+import serial
+
+slave_address = 254
+instrument = minimalmodbus.Instrument('/dev/rs485', slave_address, close_port_after_each_call=True)  # port name, slave address (in decimal)
+
+instrument.serial.baudrate = 19200
+instrument.serial.bytesize = 8
+instrument.serial.parity   = serial.PARITY_EVEN
+instrument.serial.stopbits = 1
+instrument.serial.timeout  = 0.05          # seconds
+instrument.mode = minimalmodbus.MODE_RTU   # rtu or ascii mode
+instrument.clear_buffers_before_each_transaction = True
+
+# log file
+log_file = 'measurement.csv'
+
+# read
+while True:
+    CO2_addr = 9
+    CO2 = instrument.read_register(CO2_addr, 1, functioncode=4) * 10
+    T_SHT4x_addr = 10
+    T_SHT4x = instrument.read_register(T_SHT4x_addr, 1, functioncode=4)
+    RH_SHT4x_addr = 11
+    RH_SHT4x = instrument.read_register(RH_SHT4x_addr, 1, functioncode=4) * 10
+    T_SCD4x_addr = 12
+    T_SCD4x = instrument.read_register(T_SCD4x_addr, 1, functioncode=4)
+    RH_SCD4x_addr = 13
+    RH_SCD4x = instrument.read_register(RH_SCD4x_addr, 1, functioncode=4) * 10
+    T_SHT4x_signed_addr = 14
+    T_SHT4x_signed = instrument.read_register(T_SHT4x_signed_addr,  1, functioncode=4, signed=True)
+    T_SCD4x_signed_addr = 15
+    T_SCD4x_signed = instrument.read_register(T_SCD4x_signed_addr, 1, functioncode=4, signed=True)
+    with open(log_file, 'a+') as f:
+        f.write(f'{CO2} {T_SHT4x} {RH_SHT4x} {T_SCD4x} {RH_SCD4x} {T_SHT4x_signed} {T_SCD4x_signed}\n')
+    sleep(10)