SHT-42 CAN bus termination jumpers

Fly SHT-42 CAN bus termination

CAN bus must have two 120 ohm resistors. One at each end of the bus.
Failure to correctly terminate the CAN bus cause to communication issues and instability.
No matter how many USB devices you connect on a singe bus only enable one 120 ohm resistor at each end of the bus. There is no need to add a resistor to every CAN device
The resistance between CAN H and CAN L measured with the system powerd off should be 60 ohms with all CAN devices connected.
If you are using a UTOC to connect to the Fly SHT-42, you will only need to connect the Fly SHT-42s two jumper caps. The UTOC 120 ohm resistor is not jumpered and always enabled.

The Fly SHT-42 has an on-board 120 ohm resistor that is enabled by installing two jumpers.