NMEA2WIFI AP NETWORK
You can operate NMEA2WIFI in two modes: AP or Client Sation. In AP (Access Point) mode, NMEA2WIFI creates a wifi network and smartphones, tablets or computers connect to this wifi network to receive/send data from/to NMEA2WIFI. In Client Station mode, NMEA2WIFI joins an existing external wifi network and transmits/receives wifi data on that network. NMEA2WIFI always creates its own AP network, even when you set NMEA2WIFI to join an existing network. In this panel, you specify the name and the password of the wifi network that smartphones, tablets and computers should use to join this network. When working as an Access Point, NMEA2WIFI uses IP address 192.168.4.1 and supports DHCP. A maximum of 5 clients can join the network and are assigned consecutive IP addresses (eg 192.168.4.2 ...). Security is WPA2-PSK. Ssid and Password can have a maximum of 15 characters and a minimum of 4 and 8 characters, respectively. When you need to change any setting of NMEA2WIFI you should connect to this newtork and then write 192.168.4.1 in the navigation bar of a browser to get the page that you are reading now.

EXTERNAL NETWORK
If you have already a working wifi network and want NMEA2WIFI to join that network as a Client Station, you should enter here the authentication parameters that NEMA2WIFI should use to join this existing network. Ssid and Password can have a maximum and a minimum size of characters as before. The IP address of NMEA2WIFI on this network is assigned by the network and appears on the corresponding text box when NMEA2WIFI gets a connection.

SERIAL PORTS SETTINGS
NMEA2WIFI has two input serial ports named as P#1 and P#2 and one serial output port, named as P#3. The baud rate of serial input P#1 can be 4800 or 9600 baud. The baud rates of P#2 and P#3 are adjustable between 4800, 9600, 19200 or 38400. It is important to note that if the baud rate of the output port is inferior to those of the input ports, data may be lost.
Data transmitted over the output serial port P#3 can be any combination of 3 data streams: data from the input serial port P#1; data from the input serial port P#2; and data received by WIFI.

WIFI SETTINGS
NMEA2WIFI can use UDP, TCP or both protocols to send and receive data through wifi. You can turn one protocol inactive by setting its port number equal to zero. Non zero port numbers, either UDP or TCP, should be in range from 1024 up to 65535. By default, NMEA2WIFI uses UDP broadcasting on port number 2000 (compatible with Navionics Sonar Chart Live). UDP broadcasting assures that all the clients connected to the wifi network listening to the specified UDP port number will receive the packets by the multiplexer.
You should set the protocol (UDP or TCP) and the corresponding port number on the connection device(s) that receive/send data from/to the NMEA2WIFI multiplexer. You also need to specify the IP address of the mutiplexer. In the case of AP ONLY mode, you specify the IP address 192.168.4.1. If the multiplexer is connected to an external network you specify the IP address that is assigned by the external network. It is important to note that only one connection with the multiplexer can be active through the TCP protocol but, at the same time, you can have multiple UDP connections.
Finally you can set which data will be transmitted by Wifi. It can be any combination of the NMEA0183 data appearing at the two input serial ports P#1 and P#2.

SETTING OPERATING MODES
In addition to the above parameters, you have 2 radio buttons to choose between: (i) working in AP mode only or (ii) also connect as a Client Station. You press the SET button for NMEA2WIFI to accept the parameters in this page. If there are no errors in the parameters, NMEA2WIFI changes its operation to the mode and settings selected.

FACTORY SETTINGS
Pressing the Set Factory Defaults button is the same as an hardware reset of the system. The factory setting uses the following parameters: Mode: Access Point; Ssid: NMEA2WIFI; Password: 12345678; IP Address: 192.168.4.1; Wifi Protocol: UDP; UDP Port Number: 2000; Serial Port P#1 Baud Rate: 4800; Serial Ports P#2 and P#3 Baud Rates: 38400; Serial Output on P#3: none; Wifi Output: both P#1 and P#2.