Adding DHT11 or DHT22 sensor support

[piotrfalba]

It would be great to have DHT11 or DHT22 humidity, temperature sensor support.

[jgautier]

I think a feature like this would belong in Johnny-Five.

[rwaldron]

@jgautier I agree, unfortunately, reading from these is completely insane.

https://github.com/adafruit/DHT-sensor-library/blob/master/DHT.cpp#L78-L139

Unfortunately, this isn't in scope for either Johnny-Five or Firmata

[kenchris]

It is actually not that bad :-)

https://github.com/01org/webbluetooth-edison-demo/blob/master/zephyr/sensor_core/src/main.c#L119-L227

And most of the treatment of the data is not timing sensitive and can easily be done in JavaScript

[soundanalogous]

The way to do this going forward will likely be to use the new DeviceFirmata feature once that gets merged into ConfigurableFirmata: firmata/ConfigurableFirmata#52

[arthurlutz]

I would have like use DHT11 or DHT22 from johnny-five but it seems that this is not a use case for it, or for firmata, am I missing something ? Trying to figure out if a more "low level" approach such as https://www.espruino.com/DHT11 can be used in conjunction with firmata and js...

[reimertz]

Hi there, I just want to flag that this feature is added in the Configurable Firmware: https://github.com/firmata/protocol/blob/master/dhtsensor.md.

But it seems the appropriate DHTSENSOR_DATA = 0x74 hasn't been added to this project.

Would the addition of this constant + appropriate response handling enable for us to interact with the DHT sensors?