Temperature sensor not showing any data

[dror3go]

I purchased ANAVI Infrared pHAT together with a temperature & humidity sensor (HTU21D), and attached it to a Pi 3 with a newly installed gateway version 0.10.0.
I was able to add the device in the gateway, however I can't seem to get a reading of it: when I try to turn it on (browsing to /things/generic-sensors-2) I see in the browser's network log that when I press the "on" button there's a request to PUT /things/generic-sensors-2/properties/on which doesn't get an answer. Another click on the button, to turn it off, results in an immediate response in the network tab ({"on":false}).

When I SSH to the Pi I get this:

$ /usr/sbin/i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: 40 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --

How can I make the sensor up and running?
Thanks a lot

[rzr]

HTU21D is not yet supported by
https://github.com/rzr/generic-sensors-lite

But it looks there are other drivers available:
https://www.npmjs.com/search?q=HTU21D

Tell me you manage to use any of those ?

Then it should be easy to add it as a new "controller" in
https://github.com/rzr/generic-sensors-lite/tree/master/lib/temperature

Just add an else statement in:
https://github.com/rzr/generic-sensors-lite/blob/master/lib/temperature/index.js#L98

Then adapter can be updated

Does this help ?

[dror3go]

I'm trying to use sensor-htu21d but I'm not sure what are the steps. So I did:

cd /home/pi/.mozilla-iot/addons/generic-sensors-adapter/
npm i sensor-htu21d

Then I edited node_modules/generic-sensors-lite/lib/temperature/index.js:

var Htu21d = null;

...

try {
  Htu21d = require('htu21d.js');
} catch (err){
  // console.log(err);
}

...

} else if (this.options.controller === 'htu21d' || this.options.controller === 'htu21d-sensor') {
  this.sensor = new Htu21d(this.options.sensor);
}

But I'm pretty sure I'm not doing it right :-)
Any help would be appreciated.

[rzr]

well it's a good start

This module could be preferable to use:
https://github.com/bbx10/node-htu21d/blob/master/index.js#L95

Then it will be easier to also support iotjs:
https://github.com/rzr/webthing-iotjs/wiki/IotJs

To make it easier may I suggest that we use focus only on humidity value first
then once merged some refactoring should be done...

Let me suggest this plan

1/ duplicate:
https://github.com/rzr/generic-sensors-lite/blob/master/lib/battery
to
"lib/humidity"

2/
Then replace occurrences of "battery" to "humidity" :)

3/ replace "read" by "readHumidity" (update simulator too)

https://github.com/bbx10/node-htu21d/blob/master/index.js#L95

4/ then you can try by running once it work you can open a PR

node ./lib/humidity

5/ Add Humidity to:
https://github.com/rzr/generic-sensors-lite/blob/master/lib/index.js

6/ import driver and add controller like you did in init part, test it update PR
Set default Humidity driver in:
https://github.com/rzr/generic-sensors-lite/blob/master/lib/controllers.js

7/ I will suggest a plan for refactoring this into temperature sensor too

8/ Multiple type sensors should be also specified, eventually as non w3c API, relate to:
bbx10/node-htu21d#1

[rzr]

I have prepared you the last for step 6 and later

On trouble feel free to reach me here or on irc

May I ask @dror3go what distro are you using ?

If debian please can you try Iot.js:

https://github.com/rzr/webthing-iotjs/wiki/IotJs

with

bbx10/node-htu21d#2

[dror3go]

I made the changes manually, but the humidity is not available in the UI. Is there a command I need to run 1st in order to be able to use it?
I noticed that when viewing ~/.mozilla-iot/addons/generic-sensors-adapter/package.json then it contains moziot object with generic-sensors config array, which includes ambientLightSensor, colorSensor, temperatureSensor, but lacks the new humiditySensor.
Also, note that I still have version 0.0.9, just with these humidity manual additions. Should I update to 0.0.14 and if so - how?

As for the distro - well I'm using Mozilla gateway 0.10.0 and when I SSH to the Pi I see that it's indeed Debian. What's the motivation to use IotJs and what is its current replacement in the default setup?

[rzr]

yes I am about to update the mozilla adapter without the humidity sensor...
I wanted you to test the driver in this module, if it is working please show me your code in a PR, if it's good I will integrate it in next version.

Originally i made this module for iotjs and since it's backward compatible with node, then i reused this module in mozilla addon.

[dror3go]

Oh sorry, I totally forgot about the readings.

So after I've added lib/humidity/index.js, lib/humidity/simulator.js and running:

$ node ./lib/humidity
log: level=0.559389175818104

That's fine.
But I wasn't able to use the driver, it's still using the simulator.
Where should I initiate the driver?

[rzr]

yes the simulator is used by default
So you need to add the controller in

https://github.com/rzr/generic-sensors-lite/blob/master/lib/humidity/index.js

like I made for

https://github.com/rzr/generic-sensors-lite/blob/master/lib/temperature/index.js#L94

Then you can test it using:

node lib/humidity "{ \"controller\": \"node-htu21\"}"

I can prepare this in a branch if you can try find me in chat room.