Simple ESP8266 WiFi Temperature and Humidity sensor logger

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Re: Simple ESP8266 WiFi Temperature and Humidity sensor logg

By mikewen
- Mon Apr 20, 2015 12:24 am #15088 I'v been using si7021 (TEMPERATURE AND HUMIDITY SENSOR) for a few months now.

SI7021 works much better than DHT11/DHT22.
power consumption is very low, and much more accurate.
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Re: Simple ESP8266 WiFi Temperature and Humidity sensor logg

By whats_up_skip
- Mon Apr 20, 2015 1:58 am #15092 [quote="mikewen"]I'v been using si7021 (TEMPERATURE AND HUMIDITY SENSOR) for a few months now.

SI7021 works much better than DHT11/DHT22.
power consumption is very low, and much more accurate.

Your work looks interesting. I think you need to add some more information about the system on your web site.
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Re: Simple ESP8266 WiFi Temperature and Humidity sensor logg

By uber4
- Mon Apr 20, 2015 6:57 am #15112
Jan Marius Evang wrote:
whats_up_skip wrote:I am surprised that there are no simple temperature and humidity sensors based on the ESP8266 listed.

I have found similar designs, but they also involve an Arduino type device in the circuit.
Example: http://www.instructables.com/id/ESP8266 ... ty-logger/

I thought the ESP8266 along with only a DHT22 temperature and humidity sensor and a few passive components would have been all that is required, or am I missing something here?


I made a temperature logger with a DHT11 + ESP8266(-01) + USB 3.3v power. Very simple with the nodemcu firmware and some pieces of code I found on the net. https://thingspeak.com/channels/29692
DHT22 is more accurate than DHT11.

Marius


Hi

I saw your channel and I think you can improve your accuracy powering the DHT with 5V.
Take a look at my test:

http://www.esp8266.com/viewtopic.php?f=19&t=1470&p=13300&hilit=dht22#p13300
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