2021-01-29 06:31:58 -05:00
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[](https://github.com/marketplace/actions/arduino_ci)
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2021-12-16 11:29:43 -05:00
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[](https://github.com/RobTillaart/DHT_Simulator/actions/workflows/arduino-lint.yml)
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[](https://github.com/RobTillaart/DHT_Simulator/actions/workflows/jsoncheck.yml)
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2021-01-29 06:31:58 -05:00
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[](https://github.com/RobTillaart/DHT_Simulator/blob/master/LICENSE)
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[](https://github.com/RobTillaart/DHT_Simulator/releases)
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2021-12-16 11:29:43 -05:00
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2021-01-29 06:31:58 -05:00
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# DHT_Simulator
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Arduino sketch to simulate a DHT22 temperature and humidity sensor.
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## Description
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The DHT22 is an often used sensor and many libraries are written for it
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including my own https://github.com/RobTillaart/DHTNew library.
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To better understand the protocol and to be able to debug my library
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I wrote a simulator for the DHT sensors in 2014.
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The simulator can be used to test applications to that use a DHT sensor,
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e.g. to get high alarm temp or whatever.
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Currently the code uses two analogue ports to get a value for temperature
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and humidity. Just connect two potentiometers to play and simulate increase and
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decrease of the temperature and humidity.
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## 0.2.1
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- added pin to trigger CRC errors
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- added temp and hum pin for input for CI
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- added pins for CRC error, pulse length error and timeout error
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(to be tested in detail)
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## 0.2.0 version
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- added flag for random generation of data
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- added flag for debug
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- explicit support ESP32 & ESP8266
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- added counter # samples generated per second ==> so one sees it still runs
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- added error and debug messages // some commented
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The simulator is not tested extensively so please report bugs.
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## Future
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1) use the simulator-core as a bridge to other sensors.
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Idea is to use the code of the simulator in combination with a
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Sensirion or two separate sensors (DS18B20 + ? ) to provide an
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accurate temperature and humidity. These could then be readable
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with any DHT library with the performance of a DHT (~ 5ms).
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(when time permits)
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2) implement a recorder mode, to be able to replay a certain
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behaviour time after time.
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## Operation
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- adjust the pins in the head of the program to meet your setup
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- compile, connect, run
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And have fun.
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