Update 1 It looks like Louis and I agree on this one since we both suggested the same idea at the exact same time :P. We're looking for feedback from other folks now on our proposals for how to interact with Fido via text messages.
I was just thinking about keypads attached to Fido when it occurred to me that there is already a keypad in the relationship here. Fido isn't just Fido, it's Fido and the cellphone that it's sending texts messages to. That cellphone also has a keypad and can send Fido text messages so the cellphone can act as Fido's keypad :).To send Fido an upper limit
Send a text to your Fido: "upper 95"To send Fido a lower limit
Send a text to your Fido: "lower 65".To check your the current temperature that your Fido is reading
Send a text to your Fido: "current".To get a list of possible commands
Just text something incorrectly ;).Security
To prevent any evil doers from reprogramming your Fido we could have a button that turns "reprogrammable mode" on and off. Another possibility is an authentication method like sending a password with each text.
to set for the first time: "set pass busybee" then with every text prepend with your pass: "busybee upper 92" and to reset: "busybee set new pass orangejuice"