MinimalModbus debug mode. Create serial port /dev/ttyS0
MinimalModbus debug mode. Will write to instrument (expecting 7 bytes back): '\x01\x03\x04\x11\x00\x01\xd5?' (01 03 04 11 00 01 D5 3F)
MinimalModbus debug mode. Clearing serial buffers for port /dev/ttyS0
MinimalModbus debug mode. No sleep required before write. Time since previous read: 1599131357477.79 ms, minimum silent period: 2.01 ms.
MinimalModbus debug mode. Response from instrument: '\x01\x03\x02\x00\x00\xb8D' (01 03 02 00 00 B8 44) (7 bytes), roundtrip time: 12.1 ms. Timeout for reading: 50.0 ms.

Pump is in mode: 0
MinimalModbus debug mode. Will write to instrument (expecting 8 bytes back): '\x01\x10\x04\x11\x00\x01\x02\x00\x01!\x11' (01 10 04 11 00 01 02 00 01 21 11)
MinimalModbus debug mode. Clearing serial buffers for port /dev/ttyS0
MinimalModbus debug mode. No sleep required before write. Time since previous read: 1504.00 ms, minimum silent period: 2.01 ms.
MinimalModbus debug mode. Response from instrument: '\x01\x10\x04\x11\x00\x01P\xfc' (01 10 04 11 00 01 50 FC) (8 bytes), roundtrip time: 14.2 ms. Timeout for reading: 50.0 ms.

Pump mode changed
MinimalModbus debug mode. Will write to instrument (expecting 7 bytes back): '\x01\x03\x04\x11\x00\x01\xd5?' (01 03 04 11 00 01 D5 3F)
MinimalModbus debug mode. Clearing serial buffers for port /dev/ttyS0
MinimalModbus debug mode. No sleep required before write. Time since previous read: 1503.38 ms, minimum silent period: 2.01 ms.
MinimalModbus debug mode. Response from instrument: '\x01\x03\x02\x00\x01y\x84' (01 03 02 00 01 79 84) (7 bytes), roundtrip time: 12.1 ms. Timeout for reading: 50.0 ms.

New pump mode is: 1