PAIRING MULTIPLEXERS
In order for 2 multiplexers to work together, they need to be paired. Pairing consists on providing the Mac Address of the multiplexer you want to communicate with. Each multiplexer has a unique Mac Address which is shown in the area below the logo image of the present webpage. Once you know the Mac Address of the other multiplexer you have to enter it in the shown text box. You need to enter the Mac Address in the exact format as shown. If you make a mistake when you type the Mac Address, an error message will be displayed in red and you will not be able to proceed until you enter a valid Mac Address. Pairing another multiplexer with the NMEA2WIFI can be thought as if an EXTRA input/output port is added to the NMEA2WIFI multiplexer. You can route data from any of the inputs of the NMEA2WIFI to that EXT output port which will be received (and routed) by the other multiplexer. In the same way, you can route the data received from the other multiplexer at the EXT input port and route it to any of the NME4WIFI outputs. The best way to test if 2 paired multiplexers are working as expected, is to enter Simulation Mode in one of them and enter Debug Mode in the other one. The simulated data generated by one of the multiplexers should appear on the Debug Window of the other multiplexer. It is important to note that the multiplexers can not use the same SSID. If you are working with 2 NMEA2WIFI multiplexers, you should change the SSID of one of them. There are 3 possibilities for the 2 multiplexers to talk to each other:

• Both multiplexers only create their APs and are set not to connect to any external network (router, home WiFi or smartphone hotspot).
• One multiplexer only creates its AP network and the other multiplexer also connects as a station to the AP created by the first multiplexer.
• Both multiplexers also connect to a SAME external network (router, home WiFi or smartphone hotspot).

There is no guaranty that the multiplexers can talk to each other if they also connect to DIFFERENT external networks (router, home WiFi or smartphone hotspot). Also note that the NMEA2WIFI multiplexer can talk to more than one multiplexer if you enter FF:FF:FF:FF:FF:FF as the pairing Mac Address. This address is understood as a broadcasting address and every multiplexer in range will receive the messages sent by the NMEA2WIFI. Finally note that if you are using the NMEA2WIFI alone, it is advisable to uncheck all the 4 'TO EXT' as well as the 3 'EXT TO' checkboxes.