Domoticz

Hello, I recently installed Domoticz on my RPI2, working great.

The next feature I wanted to add was to monitor 2 K-type thermocouples in my wood fired pizza oven.

I aquired some MAX31850, these are 1 wire thermocouple amplifiers. Wired them up togehter with a DSB12b20 for ambient temperature.

all sensor are working fine and I can see the values in the console, for instance here is temperature readout of a MAX31850:

pi@raspberrypi /sys/bus/w1/devices/3b-000000191a18 $ cat w1_slave
fd 7f 81 1b f0 ff ff ff 0c : crc=0c YES
fd 7f 81 1b f0 ff ff ff 0c t=2047812

Unfortunately Domoticz does not recognize the MAX31850 as device. It only finds the DS12B20. even if I add another 1-Wire under hardware it only displays the DS12B20..

Below are devices: 1 DS12B20 and 2 MAX31850

pi@raspberrypi /sys/bus/w1/devices $ ls
28-000006dc7fe7 3b-000000191a18 3b-000000191dab w1_bus_master1

Is there a way I can make the MAX31850 also work?

I think it will become a popular piece of equipment as these exist in almost any thermocouple type. also they are in my opinion much better than the MAX31855 which is SPI cannot be stacked.

One workaround could be using FooGadget's wireless multi sensor http://foogadgets.tictail.com/. It should support MAX31850 and many other 1Wires too. If you don't mind to go wireless, that is.

That would be my last resort, but if nothing else works..

I think in the Domoticz code something has to be changed so that it also looks for other than 28-xxxxxxx devices. unfortunately I am not a programmer

http://owfs.org/index.php?page=ds1825

it seems OWFS has support for this, now I need to find out what it is and how I can use to work with domoticz

edit:
I found out after half a day of reading what OWFS is and how to install it. I made a fresh install with the Domoticz image as described in the wiki. then I installed OWFS. Now it seems that Domoticz is still using the Kernel instead of OWFS. does anyone know how I can tell Domoticz to use OWFS and not Kernel?

After some more investigation, OWFS only works with USB --> I2C stick. which I dont have :/

Does someone know if I modify the file 1WireByKernel.cpp as found on https://github.com/domoticz/domoticz/tr ... ware/1Wire , how I could replace it in the pi? I tried to find it with sudo find / -name "*1Wire*" but it seems not to be there somewhere, I dont think it can be too hard to modify, as the output of the MAX31850 is very similarr as the output of a DS12B20..

No one?

Still any luck with max31850?

Nope, I dont have the skills nor time to find out myself how to get into the files inside the linux thing where the 1-wire thing is coded. if I could just replace the files with modified like on a windows pc it would be quite easy to copy paste 99% of the ds12b20 code and change only some minor things to make it work.

No one? I can pay someone a few bucks if neccesary to add the MAX31850. I think for someone with minor coding skills it will be really easy as it really the same output as DS12B20..

More then 4 years .. could please someone code that it would also allow family 3B-xxx also and not only 28-xxx

thanks!!

In 4 years time, you should be able to build up a very good c++ coding skill. *g*
I have send you a email, let's see if we can get this supported

I have built a lot of skills but not c++ coding

I think it could be as easy to search in the code the "Error: 1Wire: Device not yet supported in Kernel mode (Please report!)" and add the 3B to allowed device families. but yes I dont know in which file to do that, and if it is even possible without the need to recompile it..

Working now in build 12922 .. THANKS!!!