Using MQTT with 1Wire (NodeLink)

BACKGROUND: I upgraded from an ISY994 to the EISY last summer. I had posted on 7/17/2025 and 7/22/2025 regarding using the MQTT plug-in to parse 1Wire sensor data from my NodeLink server running on a Raspberry Pi over to the EISY. I dropped the project when I figured out how to get the NodeLink working directly in the EISY and PG3. However, the NodeLink communications seems to cause a heavy burden on the EISY -- I get a lot of 'System Busy' pop-ups. This eventually causes the EISY to not be able to read device REC files, which caused me to have to delete several devices from EISY, factory reset them, and load them back into EISY.

REFERENCES:
NodeLink: https://forum.universal-devices.com/forum/113-nodelink/
7/17/2025 Post: https://forum.universal-devices.com/topic/45372-questions-using-mqtt-on-eisy/
7/22/2025 Post: https://forum.universal-devices.com/topic/45389-using-mqtt-plugin-for-non-sonoff/
1wire2mqtt: https://github.com/unlo/1wire2mqtt
MQTT Explorer: https://mqtt-explorer.com/

REVISITING MQTT: I have decided NodeLink is causing more problems than it is worth. I have stopped NodeLink from talking with my EISY which has stopped the 'System Busy' pop-ups. Hence I am revisiting using the MQTT plug-in. I still have NodeLink running so that it's underlying OWFS (OneWire File System) is available. I am using a modified OWFS-to-MQTT python program (1wire2mqtt) to control how the 1-wire data is presented to the EISY MQTT broker. My strategy is to use the 1wire2mqtt program to present the data to the MQTT plugin in a format the plug-in can already handle. Below is a snapshot of the last entry in my 7/22/2025 post. I had asked TriLife for a sample of what a Sonoff/Tasmota Temperature sensor publishes to mqtt. Then I asked him what the Devfile would look like to access that data.

From the information above, I was able to modify the 1wire2mqtt python program to publish my 1wire data in a compatible format. Below is the results shown with MQTT Explorer.

Next, I setup my MQTT plug-in's devfile to access the MQTT data. Below is the contents of my devfile.yaml file.

I have had some success. Two of the eight devices are working in the MQTT plug-in. Below are snapshots from the PG3 MQTT nodes screen.

PROBLEMS:
1. As you can see, two of the DS18B20 sensors are working (highlighted in yellow). One of these is a DS18B20 device and the other is the older DS18S20 device. (The DS18B20 has selectable 9 to 12-bit resolution where the DS18S20 is 9-bits only.) I modified my 1wire2mqtt python program to present both as DS18B20 devices. However, I cannot figure out why the other five DS18B20 type sensors are not working. I have examined the MQTT Explore output closely and cannot figure out what is wrong. Can you help?

2. The second problem is I am trying to access both temperature and humidity data from a DS2438 1wire device. I have manipulated the 1wire2mqtt python program to present these as AM2301 devices and am using the TempHumid type in my devfile.yaml. I have no idea if the MQTT data is in the expected format for the plug-in. If you could supply me with an example of what the MQTT data looks like for the TempHumid type like TriLife did for the Temp type, this would be a tremendous help?

I am running v0.40.2 of the plug-in.

Thanks,
Emile Victory

Edited yesterday at 03:27 AM1 day by EVictory