diff --git a/tests/measure_multiple_devices.py b/tests/measure_multiple_devices.py
index 3fb67a8..b65791c 100755
--- a/tests/measure_multiple_devices.py
+++ b/tests/measure_multiple_devices.py
@@ -36,8 +36,8 @@ while True:
             T_SCD4x_signed = instrument.read_register(T_SCD4x_signed_addr, 1, functioncode=4, signed=True)
             with open(f'measurement_device_{slave_address}.csv', 'a+') as f:
                 f.write(f'{time():.1f} {CO2} {T_SHT4x} {RH_SHT4x} {T_SCD4x} {RH_SCD4x} {T_SHT4x_signed} {T_SCD4x_signed}\n')
-        except minimalmodbus.NoResponseError:
+        except minimalmodbus.NoResponseError as e:
             with open('measure.log', 'a+') as logfile:
-                logfile.write(f'Read error for device {slave_address} at {time()}\n')
+                logfile.write(f'Read error for device {slave_address} at {time()} ({str(e)})\n')
             continue
     sleep(10)