Luckily, the thermometer's circuit board has an unpopulated header that's ready for hacking. I wanted to keep my setup flexible so I used an old cable with the right number of wires and soldered a set of header pins onto the board. By making a hole in the thermometer case the cable can be removed anytime.

• pin D: IR data
• pin C: IR clock
• pin V: IR power (3.3V), and laser pointer power can be connected here too
• pin G: IR ground

(photos to come)