Add support for Arexx Multilogger

[zuckschwerdt]

Adds support for Arexx Multilogger IP-HA90, IP-TH78EXT, TSN-70E.

See also #2388 and #2482.

[zuckschwerdt]

I still need to add the MCP9808 decoding for the IP-HA90.

We need to know if the Arexx TSN-70E is compatible to that.
And @MacH-21 did you test your "Arexx IP-TH78EXT"(?) yet?

[inonoob]

Dear all,

I've compiled the version with the support and tracked the following messages:

I have 6 sensor TSN-TH70E just next to me:

2023-04-20 21:17:44  ID: 40b9  Humidity   : 0655 (57.44 %)
2023-04-20 21:17:50  ID: 4e2a  Temperature: 1701 (18.89 C)
2023-04-20 21:17:50  ID: 4f86  Temperature: 1748 (19.6 C)
2023-04-20 21:18:05  ID: 4e2b  Humidity   : 0665 (58.03 %)
2023-04-20 21:18:27  ID: 4e2a  Temperature: 1700 (18.88 C)
2023-04-20 21:18:38  ID: 4f87  Humidity   : 066e (58.36 %)
2023-04-20 21:18:40  ID: 40b8  Temperature: 175c (19.8 C)
2023-04-20 21:18:55  ID: 4dea  Temperature: 169c (17.88 C)
2023-04-20 21:19:06  ID: 4e2b  Humidity   : 0678 (58.72 %)
2023-04-20 21:19:12  ID: 40b9  Humidity   : 0658 (57.55 %)
2023-04-20 21:19:16  ID: 4f86  Temperature: 1751 (19.69 C)
2023-04-20 21:19:31  ID: 4e2a  Temperature: 171b (19.15 C)
2023-04-20 21:19:34  ID: 4da6  Temperature: 16cf (18.39 C)
2023-04-20 21:19:35  ID: 4f87  Humidity   : 0669 (58.17 %)
2023-04-20 21:19:48  ID: 4e84  Temperature: 16b3 (18.11 C)
2023-04-20 21:19:52  ID: 4deb  Humidity   : 0684 (59.16 %)
2023-04-20 21:19:58  ID: 40b8  Temperature: 176a (19.94 C)
2023-04-20 21:20:08  ID: 4da7  Humidity   : 0721 (64.93 %)
2023-04-20 21:20:11  ID: 4f86  Temperature: 1759 (19.77 C)
2023-04-20 21:20:21  ID: 40b9  Humidity   : 0654 (57.40 %)
2023-04-20 21:20:22  ID: 4e85  Humidity   : 0714 (64.45 %)
2023-04-20 21:20:32  ID: 4e2b  Humidity   : 066d (58.32 %)
2023-04-20 21:20:38  ID: 4dea  Temperature: 16c4 (18.28 C)
2023-04-20 21:20:50  ID: 4f87  Humidity   : 0666 (58.06 %)
2023-04-20 21:20:55  ID: 40b8  Temperature: 1770 (20 C)
2023-04-20 21:21:00  ID: 4da6  Temperature: 170e (19.02 C)
2023-04-20 21:21:15  ID: 4e84  Temperature: 16ee (18.7 C)
2023-04-20 21:21:28  ID: 4f86  Temperature: 175e (19.82 C)
2023-04-20 21:21:32  ID: 4e2a  Temperature: 175e (19.82 C)
2023-04-20 21:21:33  ID: 4da7  Humidity   : 0712 (64.38 %)
2023-04-20 21:21:39  ID: 4deb  Humidity   : 067a (58.80 %)

[inonoob]

Hey,

I've done the next cross check:

2023-04-20 22:00:33  ID: 4deb  Humidity   : 52.2 %   Sensor Raw: 0633
2023-04-20 22:00:43  ID: 4e2b  Humidity   : 53.3 %   Sensor Raw: 0657
2023-04-20 22:00:47  ID: 40b9  Humidity   : 53.1 %   Sensor Raw: 0651
2023-04-20 22:00:49  ID: 4da6  Temperature: 20.23 C  Sensor Raw: 1787
2023-04-20 22:01:05  ID: 4e2a  Temperature: 19.92 C  Sensor Raw: 1768
2023-04-20 22:01:11  ID: 4f87  Humidity   : 54.1 %   Sensor Raw: 0671
2023-04-20 22:01:15  ID: 40b8  Temperature: 20.09 C  Sensor Raw: 1779
2023-04-20 22:01:27  ID: 4da7  Humidity   : 56.2 %   Sensor Raw: 06b4
2023-04-20 22:01:36  ID: 4f86  Temperature: 19.72 C  Sensor Raw: 1754
2023-04-20 22:01:36  ID: 40b9  Humidity   : 53.1 %   Sensor Raw: 0650
2023-04-20 22:01:42  ID: 4e84  Temperature: 19.52 C  Sensor Raw: 1740
2023-04-20 22:01:44  ID: 4dea  Temperature: 19.41 C  Sensor Raw: 1735

[zuckschwerdt]

Are those values plausible, are they what you expect?

[inonoob]

I have two comments for the moment.

the temperature conversion:
temp_c = sens_val * 0.01f - 40.0f ==> it should be temp_c = sens_val * 0.01f - 39,6f as it is 3V

In addition the datasheet mention that if temperatur is different from 25°C the relative humidity must be compensate.

I found from Arexx the following formula for the humidity:

3 nodes:
value=p0 + rawValue*(p1 + rawValue*p2)

p0=-4
p1=0.0405
p2=-2.8e-6

float humidity = -4 + 0.0367 * sens_val * (0.0405 * -sens_val* 2.8e-6)

What do you think ?

Source: https://github.com/redflo/pylarexx/blob/master/sensors.txt
https://github.com/redflo/pylarexx/blob/master/deviceinfo.xml

Last point is the ID from Hex to Dec

[inonoob]

But at the end I must release that the Accuracy for SHT10 is for Humidity +- 4,5% and for temperature +- 0,5°C. So I would say the are within specs.

[zuckschwerdt]

Thanks. Yes the 3V conversion seems better suited. The humidity conversion depends on wether the hardware is V3 or V4. Do you know it is V3 (the -4 p0, V4 has -2 there)?

[inonoob]

Could you tell me your source for the V3 and V4 topic ? I would like to double check.

[zuckschwerdt]

Could you tell me your source for the V3 and V4 topic ? I would like to double check.

The older datasheets have that note in "Table 6". The current datasheet only has the newer calculation.

[inonoob]

Oh nice catch. Yeah I would suggest to stick with you version then.

I've checked wayback machine and the website with the sensor labeled Arexx only exist since 2016. So we could assume that v4 was out for a long time.

http://web.archive.org/web/20150122105634/https://www.arexx.com/templogger/html/en/products.php

[inonoob]

I would also propose to change the ID to int dec:

"id", "ID", DATA_FORMAT, "%04x", DATA_INT, id,

to

"id", "ID", DATA_FORMAT, "%d", DATA_INT, id,

[inonoob]

Hey,

question don't you have a conflict with [245]* ThermoPro TX-2C Thermometer and this branch as this sensor is 245 aswell ?

best regards

[zuckschwerdt]

I'll rebase later on.

[MacH-21]

Hi All,
Sorry for long delay in replying,

@zuckschwerdt

I still need to add the MCP9808 decoding for the IP-HA90.

We need to know if the Arexx TSN-70E is compatible to that. And @MacH-21 did you test your "Arexx IP-TH78EXT"(?) yet?

TSN-TH70E internal SHT10 is same as IP-TH78EXT external SHT10 IP rated enclosure, therefore compatible.
It is the sensor type that requires sorting first, which can be done on the 16bit ID
(Device ID & 0xf000) = 0x2000-TC-77, 0x4000-SHT10,
32bit ID = MCP9808.
I have attached txt file!! snip of code to decode the sensors, hopefully it makes sense, also a screen capture of decode.

rtl_issue_2487-1.txt

[MacH-21]

Are those values plausible, are they what you expect?

I use V3 parameters, so it has continuity with the Arexx software.

[inonoob]

Hey,

quick question merge still open or did I miss it ?

[inonoob]

Hey,

quick question. The Arexx company seems to have started to sell those sensor again. The amount of units might increase over the time. I still see that this is branch on it own. The sensor did had the number 250 but in the meantime other sensors have been added.

The sensor number could be changed and then merged into the master ?

BR

[inonoob]

My setup is working since 7 month without any issue with MQTT and Home Assitant. So again many thanks to everyone making from electronic waste into useful set sensors.

[zuckschwerdt]

Thanks @inonoob for the feedback and keeping up with the long journey to get this merged!

[inonoob]

Thanks to you @zuckschwerdt for your support in the long journey and making it possible. Ah by the way, Arexx is back and has started to launch new sensors again. On Reichelt they have there new model. Let hope they keep the 433 encoding :)