Getting interference when sensor is 1 room away

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Gert Gottschalk

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Jun 22, 2021, 12:22:39 AM6/22/21
to PrivateEyePi
Hi All,

I setting up a Raspberry weather station with JemRF parts.
  • RPI gateway
  • Temp / Hum sensor (#14)
  • Temp / Hum / Pressure sensor (#40)
To experiment I have gateway and #14 in the same room, Sensor #40 is in the next room. Data from #14 are clear, but from #40 (next room) are garbled. Is that to be expected? I understand the manufacturer website says the signal works through wall to about 30m. Mine is far less than that.

Any settings in the hardware that I need to adjust?

Below the log from the software.

Mon Jun 21 20:41:46 2021 14 AWAKE----
Mon Jun 21 20:41:46 2021 14 HUM43.84-
Mon Jun 21 20:41:46 2021 14 TMPA26.89
Mon Jun 21 20:41:46 2021 14 BATT3.20-
Mon Jun 21 20:41:46 2021 14 SLEEPING-
Mon Jun 21 20:44:01 2021 40 AWAKE----
Mon Jun 21 20:44:45 2021 17 AWAKE----
Mon Jun 21 20:46:59 2021 14 AWAKE----
Mon Jun 21 20:46:59 2021 14 HUM43.84-
Mon Jun 21 20:46:59 2021 14 TMPA26.87
Mon Jun 21 20:46:59 2021 14 SLEEPING-
Mon Jun 21 20:52:12 2021 14 AWAKE----
Mon Jun 21 20:52:12 2021 14 HUM43.97-
Mon Jun 21 20:52:12 2021 14 TMPA26.83
Mon Jun 21 20:52:12 2021 14 SLEEPING-
Mon Jun 21 20:54:27 2021 40 AWAKE----
Mon Jun 21 20:57:25 2021 14 AWAKE----
Mon Jun 21 20:57:25 2021 14 HUM44.10-
Mon Jun 21 20:57:25 2021 14 TMPA26.80
Mon Jun 21 20:57:25 2021 14 SLEEPING-
Mon Jun 21 20:59:42 2021 40 AWAKE----
Mon Jun 21 21:02:38 2021 14 AWAKE----
Mon Jun 21 21:02:38 2021 14 HUM44.10-
Mon Jun 21 21:02:38 2021 14 TMPA26.78
Mon Jun 21 21:02:38 2021 14 SLEEPING-
Mon Jun 21 21:04:55 2021 40 AWAKE----
Mon Jun 21 21:04:55 2021 40 2�����
                                  W
Mon Jun 21 21:04:55 2021 40 �����&

Mon Jun 21 21:04:55 2021 40 �Kz+
Mon Jun 21 21:04:55 2021 40 M� ���e�
Mon Jun 21 21:04:55 2021 40 BATT3.20-
Mon Jun 21 21:04:55 2021 40 SLEEPING-
Mon Jun 21 21:07:50 2021 14 AWAKE----
Mon Jun 21 21:07:50 2021 14 HUM44.10-
Mon Jun 21 21:07:50 2021 14 SLEEPING-
Mon Jun 21 21:10:07 2021 40 AWAKE----

Cheers,
Gert

Gadjet Nut

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Jun 22, 2021, 7:54:54 AM6/22/21
to Gert Gottschalk, PrivateEyePi
Try position the sensor so the antennae is pointing straight up (vertical). If that doesn’t work increase the NOMESSAGE setting to 3 or 4. Noisy radio environment could contribute to poor signal. You can try different frequencies and channels to find one that works best in your environment. 

If you bring sensor 40 closer to the receiver with no obstacles, does that resolve the problem? What type of walls separate the sensor from the receiver (brick, drywall?). 

On Jun 22, 2021, at 12:22 AM, Gert Gottschalk <dr.g...@gmail.com> wrote:


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Gert Gottschalk

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Jun 22, 2021, 8:48:31 PM6/22/21
to PrivateEyePi
Hi,

Hm, copy / pasting a screen shot results in 'Message Deleted!' ???

My setup is in a pretty dense apartment environment. Lot's of wifi/bt/rf ...
Walls are cheap drywall. Antennae are line up vertically.

I've moved #14 to #40 instead. #14 does better

Tue Jun 22 17:31:39 2021 40 AWAKE----
Tue Jun 22 17:31:39 2021 40 2�����
                                  W
Tue Jun 22 17:32:59 2021 14 AWAKE----
Tue Jun 22 17:32:59 2021 14 TMPA27.31
Tue Jun 22 17:32:59 2021 14 BATT3.09-
Tue Jun 22 17:32:59 2021 14 SLEEPING-


I would like to try changing channel / frequency. But what if I goof setting the sensor. I will never be able to connect to it again. Is there a factory reset procedure?

Cheers,
Gert

Gert Gottschalk

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Jun 23, 2021, 6:49:07 PM6/23/21
to PrivateEyePi
Hello,

Putting sensor #40 in the same room (4m from gateway) resolves the problem. Disappointing result for the transmission distance, though.

Wed Jun 23 15:42:23 2021 14 AWAKE----
Wed Jun 23 15:42:23 2021 14 HUM46.88-
Wed Jun 23 15:42:23 2021 14 TMPA26.44
Wed Jun 23 15:42:23 2021 14 SLEEPING-
Wed Jun 23 15:42:49 2021 40 AWAKE----
Wed Jun 23 15:42:50 2021 40 TMPA26.22
Wed Jun 23 15:42:50 2021 40 HUM43.59
Wed Jun 23 15:42:50 2021 40 PA1012.9
Wed Jun 23 15:42:50 2021 40 BATT3.20-
Wed Jun 23 15:42:50 2021 40 SLEEPING-


Cheers,
Gert
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