Wise Clock 4 with remote "Alarm stop" button

The Ramos project brought the novel idea of a wireless alarm-stop button: instead of just reaching out to  press on the top of your nightstand alarm clock, you now have to actually get out of the bed and walk to a remote corner of your dwelling to click on a keypad. No chance you will return to sleep afterward :)

This remote alarm-stop feature for Wise Clock 4 can be implemented in several different ways, all of them using of the on-board XBee socket:

• through a Bluetooth module;
• through WiFi, using the Roving Networks WiFly module;
• through XBee radios.

The cheapest and easiest would be the Bluetooth solution, providing that you already have a BT device (e.g. Android phone/tablet) to communicate with. In pseudo-code, it should look like this:

if (alarm is ON)
{
    while (Serial1.available())

    {

       read characters received;

       if (it is the expected string)

       {

            set alarm OFF;

        }

    }

}

The WiFi solution would require a second WiFi device (phone/tablet) to access a web site, or maybe they could talk directly (sockets), using their IP addresses.

The solution based on XBee relies on direct communication between two XBee radios. One would have to build the remote device, probably around an Arduino, with a keypad and an XBee.

Updated Feb 26, 2018: A good XBee remote control would be the SparkFun Wireless joystick.

Another, much cheaper solution, that does not requires software changes, would use the M4 backpack, as detailed here.