User's Manual

RK-Wi.232FHSS-25-FCC Rapid Development Kit User’s Manual

5.2 Loopback Mode

The RK-Wi.232FHSS-25-FCC™ kit can be operated in a loopback mode by configuring the COM jumpers

in such a way as to link together the TXD and RXD lines to and from the module in the remote evaluation

board.

Using this mode, the user can send data from their local evaluation board and have it re-transmitted back

to them by the remote evaluation board. The maximum baud rate allowed in loopback mode is 38400

baud for point to point (single-endpoint addressing) communications only.

It should also be noted that this method of looping back the communications bypasses the module’s flow

control, which can cause loss of data. When using loopback mode, ensure that your data does not

exceed 144 bytes. Data cannot be streamed to a board in loopback mode.

Loopback mode using the RS232 jumpers: