Offset humidity/temp

[thkrmr]

Is it possible to control the offset for humidity and temperature with the Zigbee firmware? With the BLE firmware I can do it directly in Telink Flasher, but obviously you can't use the Flasher anymore once the Zigbee variant is flashed.

I wanted to control the offset on device level, not HA, so that the display on the device itself would be correct as well. I use ZHA. I have 'calibrated' values for a bunch of LYWSD03MMC, because they drift when it comes to humidity.

[pvvx]

Introduce (represent) standard cluster numbers and attributes to Zigbee to change parameters.

[pvvx]

Added to README.md: Home Assistant with ZHA does not have functions for additional configuration of Zigbee devices. Until this changes, there can be no additions to the firmware.

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The ZHA toolkit cannot read or change the values of arbitrary clusters. Write to ZHA and Home Assistant about adding standard Zigbee 3 features.

[thkrmr]

@pvvx Does the zha toolkit help writing to arbitrary/any cluster?

It has the attr_write service command https://github.com/mdeweerd/zha-toolkit#attr_write-writeread-an-attribute-value

I'm wondering what the clusters would be to introduce the offset.

[pvvx]

To get started, try:

9. Switch temperature between Celsius and Fahrenheit (ClusterID: 0x0204, Attr: 0x0000, ENUM8 = 1 in C, = 2 in F)

https://github.com/pvvx/ZigbeeTLc#current-additions

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Duplicate topic: https://github.com/devbis/z03mmc/issues/78

On my test Zigbee 3 coordinator, everything is ok with my program. Errors in the ZHA.

ZigBee Cluster Library Specification Revision 6 Draft Version 1.0

[pvvx]

It will be possible to bypass the ZHA prejudices in the BLE-Zigbee version if a stable version can be created. At the same time, several tests are required on different systems.

[pvvx]

Added for ZHA (fw ver 0.1.1.5)

[pvvx]

ZHA: Setting offsets for temperature and humidity Available starting from firmware version 0.1.1.6.