diff --git a/tests/minimalmodbus_test.py b/tests/minimalmodbus_test.py
index f2ee5ff..de43177 100755
--- a/tests/minimalmodbus_test.py
+++ b/tests/minimalmodbus_test.py
@@ -15,20 +15,24 @@ instrument.mode = minimalmodbus.MODE_RTU   # rtu or ascii mode
 instrument.clear_buffers_before_each_transaction = True
 
 # read
-CO2 = instrument.read_register(9, 1, functioncode=4) * 10
-sleep(0.1)
-T_SHT4x = instrument.read_register(10, 1, functioncode=4)
-sleep(0.1)
-RH_SHT4x = instrument.read_register(11, 1, functioncode=4) * 10
-sleep(0.1)
-T_SCD4x = instrument.read_register(12, 1, functioncode=4)
-sleep(0.1)
-RH_SCD4x = instrument.read_register(13, 1, functioncode=4) * 10
-sleep(0.1)
-T_SHT4x_signed = instrument.read_register(14, 1, functioncode=4, signed=True)
-sleep(0.1)
-T_SCD4x_signed = instrument.read_register(15, 1, functioncode=4, signed=True)
-print(f'CO2:\t\t{CO2} ppm\nT_SHT4x:\t{T_SHT4x} deg C\nRH_SHT4x:\t{RH_SHT4x} %')
-print(f'T_SCD4x:\t{T_SCD4x} deg C\nRH_SCD4x:\t{RH_SCD4x} %')
-print(f'T_SHT4x_signed:\t{T_SHT4x_signed} deg C')
-print(f'T_SCD4x_signed:\t{T_SCD4x_signed} deg C')
+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)
+print(f'[{CO2_addr+30001}] CO2:\t\t{CO2} ppm')
+print(f'[{T_SHT4x_addr+30001}] T_SHT4x:\t{T_SHT4x} deg C')
+print(f'[{RH_SHT4x_addr+30001}] RH_SHT4x:\t{RH_SHT4x} %')
+print(f'[{T_SCD4x_addr+30001}] T_SCD4x:\t{T_SCD4x} deg C')
+print(f'[{RH_SCD4x_addr+30001}] RH_SCD4x:\t{RH_SCD4x} %')
+print(f'[{T_SHT4x_signed_addr+30001}] T_SHT4x_signed:\t{T_SHT4x_signed} deg C')
+print(f'[{T_SCD4x_signed_addr+30001}] T_SCD4x_signed:\t{T_SCD4x_signed} deg C')