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Showing posts from October, 2018

(DHT11)TEMPERATURE AND HUMIDITY GRAPH PLOTTINGWITH THE HELP OF MICROCONTROLLER NODEMCU(HAVING INBUILT WIFI)

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In this post, i will try to make you understand the way by which DHT 11 is interfaced with Node MCU(inbuilt ESP8266 ).   The  DHT11  basically is a digital temperature and humidity sensor. It uses a humidity sensor and a thermo resistor to calculate the surrounding air temperature and sends a  digital signal on the digital pin. NODEMCU DHT11 sensor Particulars required. ........... DHT 11 SENSOR  Three male to female jumber cables NODEMCU  NOW COMING TO THE CONNECTIONS  WE CONNECT THE GROUND OF THE SENSOR TO THE GND PIN OF THE NODEMCU AND VCC OF THE SENSOR TO THE 3.3V OF THE NODEMCU.AND THE OUTPUT PIN TO ANY OF THE INPUT DIGITAL PINS OF THE  NODEMCU. HERE I HAVE CONNECTED WITH D4.  And connect the nodemcu to your pc or laptop for uploading the program.  Now you need to create an account at thingspeak. And create a new channel at your account and note the write api key to be put in the coding section....