42 lines
2.1 KiB
Markdown
42 lines
2.1 KiB
Markdown
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# DHT Temperature/Humidity sensor usermod
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This usermod will read from an attached DHT22 or DHT11 humidity and temperature sensor.
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The sensor readings are displayed in the Info section of the web UI.
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If sensor is not detected after a while (10 update intervals), this usermod will be disabled.
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## Installation
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Copy the example `platformio_override.ini` to the root directory. This file should be placed in the same directory as `platformio.ini`.
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### Define Your Options
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* `USERMOD_DHT` - define this to have this user mod included wled00\usermods_list.cpp
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* `USERMOD_DHT_DHTTYPE` - DHT model: 11, 21, 22 for DHT11, DHT21, or DHT22, defaults to 22/DHT22
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* `USERMOD_DHT_PIN` - pin to which DTH is connected, defaults to Q2 pin on QuinLed Dig-Uno's board
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* `USERMOD_DHT_CELSIUS` - define this to report temperatures in degrees celsious, otherwise fahrenheit will be reported
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* `USERMOD_DHT_MEASUREMENT_INTERVAL` - the number of milliseconds between measurements, defaults to 60 seconds
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* `USERMOD_DHT_FIRST_MEASUREMENT_AT` - the number of milliseconds after boot to take first measurement, defaults to 90 seconds
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* `USERMOD_DHT_STATS` - For debug, report delay stats
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## Project link
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* [QuinLED-Dig-Uno](https://quinled.info/2018/09/15/quinled-dig-uno/) - Project link
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### PlatformIO requirements
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If you are using `platformio_override.ini`, you should be able to refresh the task list and see your custom task, for example `env:d1_mini_usermod_dht_C`. If not, you can add the libraries and dependencies into `platformio.ini` as you see fit.
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## Change Log
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2020-02-04
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* Change default QuinLed pin to Q2
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* Instead of trying to keep updates at constant cadence, space readings out by measurement interval; hope this helps to avoid occasional bursts of readings with errors
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* Add some more (optional) stats
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2020-02-03
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* Due to poor readouts on ESP32 with previous DHT library, rewrote to use https://github.com/alwynallan/DHT_nonblocking
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* The new library serializes/delays up to 5ms for the sensor readout
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2020-02-02
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* Created
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