How to get Time Series Chart of the room Temperature, Relative Humidity and Humidity Deficit with 3$ sensor "DHT22" and Raspberry Pi without any electronic works nor any programming.
DHT22 (AM2302) CO2 SensorThough DHT22 (another name AM2302) sensor is small and low-cost, but have decent quality of precision of measuring temp/humidity.
You can buy the ready to use breakout of DHT22 for 3 - 4$ from eBay.
Why measure the room humidity as well as temperature
Cabling sensor and Raspberry Pi
Connect there with RaspberryPi's GPIO as:
- 3.3V on RPi and "+" on DHT22
- GND(0v) on RPi and "-" on DHT22
- wPi 29 on RPi and "out" on DHT22
Connect with a M2.5 Hex Spacer.
Activate a value element on the MONITOR™
Go to MONITOR™, then open Elemens menu
At first, only one View Element is active
Change one of your Value Element to Active and Save this setting.
Then, blank Value Element will soon open.
Keep these 3 of "value_id" to post the Sensor Data to this.
Install & setting dht22 software UedaTakeyuki/dht22 on your Raspberry Pi
After Raspberry Pi power on, dht22 software running on the Raspberrry Pi, send Temperature, Relative Humidity and Humidity Deficit data to the MONITOR™ service at 5 minute interval.
On your Web Browser, MONITOR™ keep refresh these time-series chart.