New I2C chips support

[phervier]

Hello

I just finished to add support for some I2C devices to fhem  for my own needs.
There are :
- TMP006  infrared temperature sensor
- HTU21D temp/humidity sensor
- MCP9808 high precision temperature sensor

To make them work i had to modify the 00_RPII2C.pm module to add read and write word capability for both SMBus and IOCTL.

What is the procedure to contribute ?

[rudolfkoenig]

Post a patch in the correct area of this forum, in this case it is Einplatinencomputer, as it is documented in the MAINTAINER.txt file.

[phervier]

As I hardly understand german the use of this forum is quite difficult for me.

So there is a MAINAINER.txt file, where could i get it ?

[rudolfkoenig]

This file is on the top level, if you check out the FHEM source code.
It is also available here, which is linked at the bottom of the fhem.de page.

[Fritz!Maxi]

...
I just finished to add support for some I2C devices to fhem  for my own needs.
There are :
- TMP006  infrared temperature sensor
- HTU21D temp/humidity sensor
- MCP9808 high precision temperature sensor

To make them work i had to modify the 00_RPII2C.pm module to add read and write word capability for both SMBus and IOCTL.
...

Until now I struggled to get the MCP9808 working in FHEM. Would it be possible for you to share your modules with me / us so that I can test them?

[phervier]

No problem, here is the file I used for a while without any problem on a raspberry pi.

The only trick is that I made this development with a previous version of the 00_RPII2C.pm. to use my sensors I modified this module and added support of word read/write .

In the last version of 00_RPII2C.pm you can use blockread and blockwrite, and it is more portable than word who suffer of little indian/big indian issue.

I should port my file to the new version of 00_RPII2C.pm but as it work perfectly now i am quite lazy to do it.

[Fritz!Maxi]

Thanks for sharing this with us! When I installed it I realized that I had to rename the module to 52_I2C_MCP9808.pm. It's defined now, but not initialized. Don't now why yet...