esp8266, mqtt acquisition of temperature and humidity

Use esp8266-01s, and transmission sensors mqtt DHT11 acquired temperature and humidity value
very much, this application is also very useful

DHT11

DHT11 is a temperature and humidity sensors, can be used to test environmental temperature and humidity, the sensor temperature measuring range is 0 ~ 50 ° C, an error of 2 ° C; humidity measuring range at 30% @ 0 ° C -90 % RH, ambient temperature of 25 ° C, humidity measuring range of 20% -90% RH, at 50 ° C, measuring range of 20% -80%.

Pin	The corresponding interface
VCC	5V
de	Single serial data bus (any one IO)
GND	Negative ground

arduino IDE configuration
in project management load library library search download dht DHT sensor by Adafruit (1.30)

search adafruit unifi download A large fruit Unified Sensor (1.02) After installing

and then you can go to test temperature and humidity module

Use esp module

Esp8266-01s module can
use to transmit data GPIO2

Connecting circuit

3.3v power source vcc and ground en
GPIO2 dht11 output signal to the
GND Ground

Students may be less likely to refer to the study
esp8266 mqtt use arduino development

http://niehen.cn/esp8266/esp8266-mqtt-%e4%bd%bf%e7%94%a8arduino%e5%bc%80%e5%8f%91%e6%95%99%e7%a8%8b/

esp8266-01s use Description

http://niehen.cn/esp8266/esp8266-01s%e4%bb%8b%e7%bb%8d/

Refer https://www.bilibili.com/video/av23531283/

Item reference code links

GitHub address

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