Wrong Unit for Iluminance and missing current iluminance in mqtt

[seti1337]

What happened?

Since last Update no longer lx instead mv unit for Iluminance with this sensor and current iluminace is not longer published to mqtt https://www.zigbee2mqtt.io/devices/RB-SRAIN01.html#tuya-rb-srain01

What did you expect to happen?

No response

How to reproduce it (minimal and precise)

No response

Zigbee2MQTT version

2.7.1 (unknown)

Adapter firmware version

{"maintrel":120,"majorrel":2,"minorrel":6,"product":0,"revision":"0x26780700","transportrev":0}

Adapter

ConBee2/RaspBee2

Setup

os: #1 SMP PREEMPT Tue Nov 4 14:31:07 UTC 2025 - 6.12.51-haos - arm64
node: v22.16.0
ha: true

Device database.db entry

No response

Debug log

No response

Notes

No response

[DIG200]

Same problem here

[lnlyssg]

Also being discussed in #29901

[keidischoi]

Same problem here

reference

[Mark-64]

I have the same issue

[igori81]

I have the same issue

[wesleyRaposo]

Comparison between different devices, one with a problem, the other without.
I hope this helps.

[snclab]

I have the same issue

[Koenkk]

We have 2 options here:

• Remove the illuminance device_class
• Compute the illuminance lx value based on the voltage (@dgibbs64 not sure if this makes sense?)

[tobiasg021]

Rain.js
I’ve put together a converter with the help of Copilot to restore the old functions.

[keidischoi]

Rain.js I’ve put together a converter with the help of Copilot to restore the old functions.

I added the original battery refresh button, not sure it works, and I confirmed two pingerprints.

_TZ3210_tgvtvdoc.js

_TZ3210_p68kms0l.js

[khaisilk1910]

Rain.js I’ve put together a converter with the help of Copilot to restore the old functions.

Where should I put this rain.js file?
Thanks

[dgibbs64]

@Koenkk

I think it's probably worth reverting the original lx sensor to not break existing automations. However add a new mV entity that shows the real output in mV. Finally an entity that does a calculated Lx value based on the mV value. This way there is backwards compatibility plus the real sensor reading and a calculated Lx. This should achieve all goals I think giving users multiple ways to use the sensor. Hope that makes sense.

[seti1337]

Problem is, current iluminance is not longer published to mqtt, so also a recalculate helper in hoa will not help