Support for Air quality sensor “Sensirion SEN 6x”

Scarpetta3 · November 15, 2024, 9:41pm

Hi everyone,
I am writing to understand if ESPhome is working on or plan to integrating the Air Quality sensor “Sensirion SEN 6x”. The SEK variant, the one for testing, is out and the Arduino git is out from two weeks (link).

I saw that in the ESPhome site, browsing the list of the supported Air Quality Sensors, there are some Sensirion sensors already supported.

Thank You very much

Regards
Matteo

Yoriel · December 19, 2024, 8:45am

I am also interested.

tuct · December 22, 2024, 6:25pm

+1, in the meantime I got it running for the sen66 with this:

Hope officiall component comes soon.
I created a feature request here:

github.com/esphome/feature-requests

Support for Sensirion SEN6X sensors

opened 03:31PM - 22 Dec 24 UTC

tuct

**Describe the problem you have/What new integration you would like** No official support for the new SEN6X sensors from Sensirion **Please describe your use case for this integration and alternatives you've tried:** Ability to use the new Sensors **Additional context** The Sensors are currently available via evaluation kits but will be released soon (Q2/2025) I managed to "port" the existing SEN5X component here: https://github.com/tuct/esphome_external_components/tree/main But it only supports the SEN66 sensor and just works, not fully tested for now

bleh · March 27, 2025, 12:59pm

It seems that Senserion still hasn’t released this sensor yet, but I’m also quite interested. It looks like the form factor is also overhauled, and a bit more manageable for case designs.

Chris_in_Texas · April 26, 2025, 3:39pm

Just an FYI that the SEN66 eval units are now shipping and can be purchased. So for design and prototyping you should be good to go.

Scarpetta3 · July 10, 2025, 7:46pm

Hello there,
I was waiting for the official component realeas but months has passed and there are no news or update so I decided to buy the SEN66 product.
You say that you have got it running with that external component but can you give me some help to do the same?
I have a ESP32 and I ahve two questions about the phisical connection:

is there a specific connector that I have to buy for the sensor side? Is the JST GHR-06V-S 6 pin type connector?
What is the wire diagram connection for the esp32 side?

Thank you very much in advance

Regards
Matteo

Scarpetta3 · July 11, 2025, 8:54am

Hello!
I just found the wire diagram and buy the right connector.

I have a doubt about this sentence: “Both SCL and SDA lines are open drain I/Os. They must be connected to external pull-up resistors (e.g. Rp = 10 kΩ)”.
Do you use the resistors or not?

Thank You
Regars
Matteo

r00tnix · September 17, 2025, 4:21pm

Not sure anyone is still using this, but I did get mine up all and working. with at least one issue around the temp offsets. In the SEN55, there was one temp slot stored on the sensor, with the diff offsets/slopes etc. On the SEN66, they ahve 5 slots, and average across all of them it seems, so even if you do adjust the one in the YAML file above, it gets averaged across all 5 so you barely see a change.

@Scarpetta3 Did you get yours working? I just wired mine directly to the ESP32, no resistors between.

Cupra85 · November 11, 2025, 3:54pm

What does your YAML look like? Could you share it? I can’t get mine to work.

Nibore · January 8, 2026, 9:25pm

For those interested, I made a ESP32 integration for the Sen66 in January 2025 with a Z2M integration. Has been working like a charm since then, super happy with it !