USB TTL cable no longer working

[tllim]

[quote pid='3287' dateline='1457557488']
Combine both Euler and Pi2 bus, the maximum available UART is 4.

There is also EXP bus and Wifi/BT Connector (J50). I suppose those would work as well (I won't use wifi/BT modul).
[/quote]

You plan to max out all UART ports :-)