The WiFi Wireless Ham Radio Coax Antenna Switch allows a single transceiver to switch between 4 antennas or 4 transceivers to switch to a single antenna. Only one switch can be ON at a given time. 
Comes in 2 separate modules: 
1) the WiFi switch control, 
2) relays and connectors. 
Having separate modules makes it more convenient to enclose the connectors in a metal box and the control in a small plastic box, the 2 modules are easily connected with 5 wires (wires not provided) via the screw terminal. 
Fully configurable via a web browser. 
The switch responds to simple TCP commands: 1,2,3,4 or a simple html command from your browser. 
An iPhone app available to control the switch. 
The module reports the status of the switches to ensure they are in sync
Screw connectors on both boards. 
Requires wires to connect the control unit to the relay/connector board (wires not provided).  Specifications: 
5VDC power input 
200 ma maximum transmitting/receiving 
5ma stand by 
250 W maximum transmitting power 
DC to 150 MHz 
4 inputs - 1 output (can be reversed) 
Configuration and control SSID of WIFI router
Router Password
Simple TCP messaging to control switch
iPhone app
Can be controlled via Python script, php, TCP 
The WiFi Wireless Ham Radio Coax Antenna Switch STT4AS1 allows a single transceiver to switch between 4 antennas or 4 transceivers to switch to a single antenna. 
Full configurable via a web browser. The switch responds to TCP commands. 
It supports 250 Watts power. 
Can also be controlled via web browser by issuing a simple command:
192.168.xxx.xxx:9999/switch/"relay number"
relay number: a value of 1,2,3 or 4
Starts of the switch can be obtained with web browser command:
192.168.xxx.xxx:9999/status
iPhone app available on Apple store: Antenna Switch The WiFi wireless antenna switch allows switching from 4 different antennas into one output to the transceiver. 
It can also be reverted so 1 antenna can be switched to 4 different transceivers. The switch module can be mounted on a box for convenience and safety.  
The module is controlled via the simple TCP commands 1, 2, 3 and 4 to switch between the 4 different inputs. 
Once the module is configured and acquires an IP address, commands can be sent to its IP address and port 9999 to switch between the inputs. The module features a reset button, a flash switch for re-flashing the firmware if needed and a serial TX and RX terminals for optional configuration, communication and monitoring. It requires a 5VDC power supply and 200 ma. 
Once you connect to the antenna switch module and establish a TCP connection using the acquired IP address and port 9999, the switch responds to the following simple TCP commands: 
1 – (default state) connect input antenna 1 to output 
2 - connect input antenna 2 to output 
3 - connect input antenna 3 to output 
4 - connect input antenna 4 to output 
TCP commands can be sent using any TCP communication APP or programs, you can write your own program, use the free iPhone app "AntennaSwitch" or directly from your browser by sending a simple http command: 
http://board.ip.address/switch/1

To setup and use this item, a basic knowledge of WiFi configuration.