Let's decide on the best possible hardware to run a small, slick, battery powered temp and humidity sensing device


#1

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?


#2

ESP8266 and DHT11


#3

I second that!


#4

I third that!


#5

Thanks all. Any suggestions as far as vendor goes? A URL to a product page would help (I know how to use Google :slight_smile: but looking for something that you have tried before and is reliable)


#6

I’m biased (as far as “vendors”)-
https://hackaday.io/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… :frowning: in SINGLE quantities ONLY…

http://www.digikey.com/product-search/en/sensors-transducers/humidity-moisture-sensors/1966708?k=DHT11


#7

Got plenty of DHT11 lying around :slight_smile: looking for the ESP8266


#9

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.
http://www.ebay.com/itm/381374534484
http://www.ebay.com/itm/1PCS-ESP8266-ESP-01-WIFI-Wireless-Transceiver-Send-Receive-LWIP-AP-STA/171907296150


#10

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 :snowflake:


#12

…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.


#13

#14

Thief River Falls is about 6 hours from me, always wanted to stop by and see if they would entertain a nerd’s dream…


#15

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