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Using Your WiFi Switch
The WiFi Switch acts like a WiFi access point and a server, you simply connect your WiFi-
enabled device to it and browse to its home page, and voila! you get a web page that lets you
turn your switch on and off.
Like any secured WiFi network, you need two things to connect... the SSID and the passkey.
The SSID of your WiFi Switch will be "WIFI_SW_nnnnnn" where nnnn is the last 6
hexadecimal digits of your device's MAC address (a unique address given to every Ethernet
device).
The passkey is an eight-digit number generated by a random number algorithm the first time
that your WiFi Switch is powered on, and is saved in EEPROM memory at that time. It's
going to be unique for every WiFi Switch. There should be a label on the little baggie that the
WiFi module came in with the passkey, but it's easy to get it if you lose it...
To get the passkey, connect a USB-Serial cable (the same cable that's used with all Eggtimer
Rocketry products) to the 3-pin header as follows:
BLACK wire – GND
WHITE wire – TX
GREEN wire – not used
Using an ASCII terminal program such as TeraTerm or HyperTerminal, connect to the serial
port at 115,200 baud, 8 bits, no parity, 1 stop bit. Now connect the battery on your WiFi
Switch. You should see the following information:
(a few lines of garbage... part of the boot process)
Note that there is a space between the first four digits of the passkey and the second four digits,
that's just to make it easier to read; when you actually enter the passkey don't type the space.
Disconnect the battery, and remove the serial cable. You won't need the cable again unless
you forget the passkey, or you need to flash the software.
Now, fire up your device's WiFi manager. Connect the battery to your WiFi Switch... you'll
see the PWR LED blink 3 times then stay on, and in about 10-15 seconds you should see your
WiFi Switch's SSID on your WiFi manager. Connect to the SSID using the passkey that you
obtained earlier (but don't put the space between the digits!), and you should see that the status
of your WiFi connection changes to Connected. You're now connected to your WiFi Switch,
and ready to start using it.
WiFi Switch v1.02
SSID: WIFI_SW_F87A6E
PASSKEY:
3718 6501
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