Problem statement: create a portable, affordable (sub $25), compact, battery powered, wifi-capable device that reports temperature and humidity to Cayenne.
Use cases: place one everywhere you want to monitor temp, humidity.
Baseline: I have this set up using a Arduino Yun and a DHT11. Not compact, not affordable, not battery powered.
Ideas?
ESP8266 and DHT11
I second that!
I third that!
Thanks all. Any suggestions as far as vendor goes? A URL to a product page would help (I know how to use Google 
but looking for something that you have tried before and is reliable)
I’m biased (as far as “vendors”)-
2022 Hackaday Prize is being sponsored by Digi-Key.
I’m definitely a Digi-Key fanboy-
Adafruit- not so much…
They’re selling a $5 RasPi Zero
for $19 a pop… 
in SINGLE quantities ONLY…
Got plenty of DHT11 lying around looking for the ESP8266
well- what “flavor” Esp8266?
I bought (10) Esp12-e units
from eBay seller “survy2014”
for $23.30 + $1.85 shipping.
-It took 10 days to receive them in the mail.
Not too bad…
I took a gamble, never used that seller before,
but it worked out well.
I love Digi-Key! If you ever find yourself in Thief River Falls, Minnesota, you can tour their facility, almost a million square feet and 3,000 employees in a town of 8,000 people.
Very close to my hometown. Visit in January for the most authentic experience 
…that thought shrivels my tenders…
but yes- I’d rather pay a teeny bit extra to ensure that the product I buy isn’t a knockoff, -and that the people shipping me the item have a decent job. It’s a “social responsibility” thing.
Digi-Key has always treated me very nicely.
Thief River Falls is about 6 hours from me, always wanted to stop by and see if they would entertain a nerd’s dream…
Just saw this as a similar thread when I made my project page. I did exactly this here Battery Powered ESP8266 Temperature/Humidity Monitor with DHT11
