Introduction: ESP8266-12 Blynk Wireless Temperature, Humidity DHT 11 Sensor
in this project using a esp8266, to show the temperature and humidity DHT11 sensor on your smartphone or tablet.
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the esp8266-12 runs at 3.3V but many sensors operate at 5v, we will use a level logical bidirectional converter to be able to connect.
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This project is linked to the previous ones, are more projects that can work together to create an automated home.
ESP8266-12 standalone blynk control outlets wireless 433 mhz
Step 1: Materials
ESP8266-12 (esp8266-7, ...... , esp8266-12e)
level logic converter bidirectional 3,3v -- 5v
DHT11 temperature and humidity sensor
power regulator 3,3v-5v
Step 2: Connections
ESP8266
VCC +3,3v
CH-PD +3.3v
gpio12 ---- RX0 (low level logic converter)
GND ground
GPIO5 ground
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logic converter bidirectional
HV +5v
GND ground
RXI --- pin 2 (DHT11)
LV +3,3v
GND ground
RX0 -----gpio12 (ESP8266-12)
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DHT11 sensor
pin 1 +5v
pin 2 output .---- RXI (high level logic converter)
pin4 ground
Step 3: Blynk App
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store app
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configure blynk
create new project ( use hardware model esp8266 )
generate AUTH TOKEN
send E-mail TOKEN ( copy TOKEN in the esp8266 sketch)
in the app Blynk use Value Display widget or Gauge widget
Step 4: Sketch
sketch
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to programming the ESP8266-12, I use ide arduino 1.6.5 and CP2102 3.3V USB To UART Serial Interface Module Adaptor ( do not connect the power of the CP2102 to esp8266-12).
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ESP8266 sketch
change the sketch in the following lines with your data
char auth[] = "xxxxxxxxxx"; //insert here your token generated by Blynk
Blynk.begin(auth, "ssid", "password!"); //insert here your SSID and password
Step 5: Thaks
Thanks by catoplepa
