Nice, though the DHT11 isn't very accurate.
My e-peen is getting stoked because I wasted/used a few weeks with no beer on a wifi temperature sensor using thermisters. Two channels so one channel could be used to measure humidity via the wet-bulb technique. They are ESP8266 based and most of the difficult code was writing the temperature compensation and zeroing.
I use them for incubator control, and they are demonstrably accurate.
Yes, the DHT11 is accurate from 22-100F, this thing is built for monitoring my shop temperature. I have a Baytech IIII RPC11A-NC telnet relay with all my lights and a kerosene Monitor 2200 heater wired up. The whole idea for this unit is have my linux box take measurements every 5 or 10 minutes and if temp=40 trigger a telnet script to logon to the control relay and turn on the heater that has a "power failure auto on" setting. I have 20 inch concrete walls 8' high with 3 inch insulation inside so if I can keep the thermal mass above freezing all I have to do is throw 4 logs in the stove and it is 60F in an hour. When the concrete gets cold it takes 2 days of constant heat to get up to an OKish temperature. The ones I am going to build for outside will have the DHT22 and no LCD as well as wireless serial or wifi for communication.
Thermisters are always hard to lock down the relative analog value to reality, I would always throw them in the freezer to get a reading and then measure ambient and do calculations from there.
Use PT100/1000 then zero them with an ice bath, but they are way more expensive to interface with than DHTxx and for no gain in your case.
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