Johnny-five: Adding SHT31 sensor support

[burgo4]

Hi all, thanks for the great framework !!!

It would be great to have SHT31 -D humidity and temperature sensor support. If I know the SHT31 uses 16bit read and write. I was trying to implement controller for that sensor, but unsuccessfully. Any plans for the future ?

[rwaldron]

Sure, we can work on this!

Do you have a branch with your controller progress?

[rwaldron]

http://www.amazon.com/Adafruit-Sensiron-Temperature-Humidity-Breakout/dp/B019MGIC3Y ?

[rwaldron]

A cursory look at this: https://github.com/adafruit/Adafruit_SHT31/blob/master/Adafruit_SHT31.cpp and the datasheet (https://learn.adafruit.com/downloads/pdf/adafruit-sht31-d-temperature-and-humidity-sensor-breakout.pdf) and I think we shouldn't have too much trouble with this.

[burgo4]

Yep, it is SHT31 (Amazon link). For now I don't have any branch. I was just trying to implement controller locally. Should I create branch ? Btw. I found very simple but nice example wrote in JAVA - https://raw.githubusercontent.com/ControlEverythingCommunity/SHT31/master/Java/SHT31.java. Maybe it can be our inspiration.

[burgo4]

Hey!
I've found my source code when I was experimenting with the controller for SHT31 -D. Can you check that? I've tried to read values, but unsuccessfully. Do you see there some bugs ? I was inspirated by JAVA source code from https://github.com/ControlEverythingCommunity/SHT31/blob/master/Java/SHT31.java.

My source code you can find here: http://is.gd/oIv5GO

[rwaldron]

@burgo4 I'm not sure if their are any bugs, but as far as implementing the baseline driver, you nailed it :)

• Drop that into lib/imu.js's Drivers (you probably already did this)
• Add necessary controllers in:
  
  
  
  • thermometer.js (example: https://github.com/rwaldron/johnny-five/blob/master/lib/thermometer.js#L473-L490)
  
  
  • hygrometer.js (example: https://github.com/rwaldron/johnny-five/blob/master/lib/hygrometer.js#L8-L25)
  
  
  • imu.js (example: https://github.com/rwaldron/johnny-five/blob/master/lib/imu.js#L1731-L1772)
  
  

Then you'll need to whip up some examples (take a look at the existing stuff). We also need to find a fritzing component, but if none exists I will just make us a basic one to work with. Ping me if you need anything, or when you're ready for some review! Great work!!

[burgo4]

@rwaldron Hey man! Thanks for your reaction ;-) I created a new branch thermo-humidity-meter-SHT31-D and pushed it. I've added the necessary controllers, created some examples. I tried to find a fritzing component but I've found just this image http://bit.ly/1Sehi7t, but maybe it will be helpful when you will create a diagram. Can you check that and give me some review ? Thanks

[rwaldron]

Ok, I can whip up a component for you :)

[rwaldron]

https://dl.dropboxusercontent.com/u/3531958/sht31-d.fzz

[rwaldron]

WOWOWOWOW

I just looked at your branch and the implementation is _perfect_. Grab that fritzing, make some examples with it and open a PR!

[burgo4]

Great !!!
So I'm going to make some examples and then I will open PR!
Thanks

[rwaldron]

We also need to have some tests in test/imu.js, but I don't want that to block you, so please let me know if you need help there

[burgo4]

I created some tests and add diagram to the solution. PR is open so please check all my staff once again. Thanks a lot for your help :-)

[burgo4]

Thanks for the great collaboration Rick. Soon I will need a support for the TSL2591 sensor (https://www.adafruit.com/products/1980). What do you think about it ?

[rwaldron]

@burgo4 you're absolutely welcome to implement a controller for TSL2591 in the Light class. Let's open a new issue for that