Can I integrate PIR DALI Part 303 (Occupancy) to make lights turn on when I enter a room

[murfett-au]

I have read through https://tasmota.github.io/docs/DALI/ which says tasmota is a DALI application controller, and understand Tasmota implements parts 207 and 209 of the DALI protocol.

Is it possible for the Tasmota to respond to events on the DALI bus? I am considering purchasing Mean Well DLS-203-P which is a DALI-2 Occupancy and Ambient Light sensor. It sends DALI-2 part 303 events which are: occupied; vacant; movement; and no movement.

I would like the control the LED dimmer level to maintain an ambient light level drops, so brightnes as the sun sets and the room darnkens; and increase the brightness futher, to a higher light level, when motion is detected.

My reading of the documentation is that this is not possible without a controller than implements the full suite of the DALI protocol.

Does anyone have any experience in getting DALI to respond to DALI bus events like this?

Has anyone used Tasmota PIRs and Tasmota light luminosity sensors to achieve the control on the Tasmota side and just sent commands out to the DALI bus?

[arendst]

As fas I can see DALI part 303 won't work with Tasmota.

Regarding your last suggestion it must be possible using rules/script/berry to send any sensor response to a Tasmota Dali controlled device as it's just a power/dimmer command that will be send to DALI by tasmota.

[murfett-au]

Thanks, I will use Tasmota only to send commands to my DALI dimmers and will keep sensors on the MQTT/Tasmota side - eg pulg my motion detectiors into a GPIO on the ESP32-S3-Pico I have plugged into a Waveshre Pico-DALI2.

I just burned out my ESP32-S3-Pico with a non compliant USB Power Supply so will have to wait for others to arrive.

I hope to find a pre-built tasmota32.bin image that has #define USE_DALI enabled to avoid building my own - I cannot see any builds with DALI in their title in the list at https://ota.tasmota.com/tasmota32/release/ - if anyone knows which release has the DALI pre-enabled I would (along with future readers of this discussion) appreciate them sharing where to find it.

[arendst]

Not sure where you looked for pre-compiled binaries but according to https://github.com/arendst/Tasmota/blob/development/BUILDS.md it's enabled by default for every esp32(C3/S3 etc) binary.

And according to the release notes binaries can be found https://ota.tasmota.com/tasmota32/release/

[murfett-au]

That's very helpful - I had not come across that BUILDS.md file, I will give it a go with ESP32-S3 firmware.

Some feedback - when I was reading the DALI documentation https://tasmota.github.io/docs/DALI/ the top of the page says:

This feature is included in tasmota32 binaries
When [compiling your build](https://tasmota.github.io/docs/Compile-your-build/) add the following to user_config_override.h:

#ifndef USE_DALI
#define USE_DALI        // Add support for DALI gateway (+5k code)
#endif

Perhaps there should be a mention of the BUILDS.md file in that section - I also think the need to expand that header which, at 1st glance says only "This feature is included in tasmota32 binaries", but only when you expand it you see the detail of needing the #define USE_DALI in the user_config_override.h

[arendst]

Well it clearly states that the feature is included in tasmota32 builds. For users wanting to use DALI in ESP8266 they have to add the defines as documented.

The presence of the BUILDS.md file is considered common knowledge like the release notes and many other additional docs in the root folder of the repository.