I got a recurrent problem with lost signal from some TC-08 loggers during logging, there is 4 TC-08 in use and I have 2 USB-hub with extra power supply, 2 TC-08 connected to each HUB and 2pc 10m USB 2.0 extensions cables with amplifier, 1 connected to 1 HUB and to computer and 1 between HUB 2 and TC...