SENA HD1200 - Manual (Page 52)

Starter Kit and User Manual for the HelloDevice 1200
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Appendix C. IP address configuration by using cross-over Ethernet cable
You may configure the wrong IP address for the HelloDevice that cannot be run in your current network
environment. You might not initialize the IP address of the HelloDevice before you install it to different network
environment. In these cases, you cannot access the HelloDevice via network, since only network-based IP
configuration function is provided in the HelloDevice.
In these cases, you will have to use cross-over Ethernet cable for communication with the HelloDevice. The
ordinary Ethernet cable is straight type, in which Rx line is connected into Rx line of other side and Tx line with
Tx line of other side. Meanwhile, crossover Ethernet cable is a cable with Rx connected to Tx of the other side,
and Tx to Rx of the other side.
You can emulate the 1:1 networking if you hook up cross-over cable between your PC and the HelloDevice,
without being affected by network routing. Take following steps for IP address reconfiguration.
1) Remove Ethernet cable from your PC
2) Directly hook up cross-over cable between your PC and the HelloDevice
5Vpower suply
RJ45
User PC
Cross over
Ethernet
Cable
HelloDevice
Rx+
Rx-
Tx+
Tx- Rx+
Rx-
Tx+
Tx-
Straight Ethernet cable Cross-over Ethernet cable
Rx+
Rx-
Tx+
Tx- Tx-
Tx+
Rx-
Rx+