This what I used on my first Heatermeter, granted that had both a heatermeter and a Linksys router in it. I am thinking about trying the 3d printed cases, but the ziplock bag works just fine.
Raspberry PI Heatermeter homemade temp controller, 2 UDS.
New Version 4.2 Heatermeter with K thermocouple support Available
PM me, if you would like a heatermeter pre-made, everything included, heatermeter, case, blower, SD card programmed, servo and case, no soldering needed ready for your network and BBQ.