| .. | ||
| DHT_Simulator.ino | ||
| LICENSE | ||
| README.md | ||
DHT_Simulator
Arduino sketch to simulate a DHT22 temperature and humidity sensor.
Description
The DHT22 is an often used sensor and many libraries are written for it including my own https://github.com/RobTillaart/DHTNew library. To better understand the protocol and to be able to debug my library I wrote a simulator for the DHT sensors in 2014.
The simulator can be used to test applications to that use a DHT sensor, e.g. to get high alarm temp or whatever.
Currently the code uses two analog ports to get a value for temperature and humidity. Just connect two potmeters to play and simulate increase and decrease of the temperature and humidity.
0.2.1
- added pin to trigger CRC errors
- added temp and hum pin for input for CI
- added pins for CRC error, pulselength error and timeout error (to be tested in detail)
0.2.0 version
- added flag for random generation of data
- added flag for debug
- explicit support ESP32 & ESP8266
- added counter # samples generated per second ==> so one sees it still runs
- added error and debug messages // some commented
The simulator is not tested extensively so please report bugs.
Future
-
use the simulator-core as a bridge to other sensors. Idea is to use the code of the simulator in combination with a Senserion or two separate sensors (DS18B20 + ? ) to provide an accurate temperature and humidity. These could then be readable with any DHT library with the performance of a DHT (~ 5ms). (when time permits)
-
implement a recorder mode, to be able to replay a certain behavior time after time.
Operation
- adjust the pins in the head of the program to meet your setup
- compile, connect, run
And have fun.