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IKEA Vindriktning IAQ

IKEA Vindriktning + BME688 + SGP30 + WS2812 connected to an ESP8266 running Tasmota

stefan-lochbrunner

Stefan Lochbrunner

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Description

I had the feeling that the air in my living room wasn't very good but had no way to actually measure it. So I bought an IKEA Vindriktning since I didn't really know where to start and it is a quite cheap device.
Since IKEA devices are known to be quite hackable I did a bit of searching and sure enough there were quite a few mods already. So I decided to put together my own version with a few more sensors and some lights and share my experience of the process.

Details

Obviously this is not the first modification of a Vindrktning (see #IKEA Vindriktning PCB and #IKEA Vindriktning Daughterboard) but I think I did some unique things that are worth sharing.

Development setup — Development setup with additinal CCS811 and MCP9808

See the project log Inspirations/references for more resources and the files section for my Eagle PCB design.

When starting the project I contemplated whether to just go quick and dirty and point-to-point wire everything and stuff it into the Vindriktning case or to go @lond's route and make it more polished. For just attaching the Vindriktnings PCB to an ESP8266 I would probably have point-to-point wired it but since I wanted to add sensors and LEDs the wiring would get too elaborate and a PCB would be the way to go, so might as well make everything a bit more polished. Meaning custom PCB, neat wiring, connectors, 3D printed LED mounts and LEDs for the additional sensors to mirror the Vindriktnings LEDs for displaying PM2.5 levels.

I started with a CCS811 and MCP9808 and then added a BME688 and SGP30 to be used in the final implementation.

Read more »

View all details

Files

ESP_IAQ_baseBoard_gerber.zip PCB Gerber files x-zip-compressed - 97.13 kB - 12/28/2022 at 15:32		Download
IKEA_Vindriktning_IAQ.zip PCB schematics and EAGLE brd file x-zip-compressed - 178.92 kB - 07/01/2022 at 08:24		Download

Components

1 × Ikea Vindriktning
1 × PCB https://aisler.net/p/UHRHAPWS
1 × ESP-12F
1 × BME688 gas, temperature, pressure, humidity sensor e.g. https://shop.pimoroni.com/products/bme688-breakout?variant=39336951709779
1 × SGP30 air quality sensor e.g. https://shop.pimoroni.com/products/sgp30-air-quality-sensor-breakout?variant=30924091719763

View all 18 components

Project Logs

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Alternate electronics for the Vindriktning: LaskaKit ESP-VINDRIKTNING
Stefan Lochbrunner • 08/10/2022 at 14:12 • 0 comments

I just came across this alternate PCB from LaskaKit, via some 3D models on Printables.
It has an ESP32, connectors for the Vindriktning's PM2.5 sensor and fan, as well as an onboard light sensor and more connectors, eg. for I2C. It also replaces the normal LEDs with WS2812's for a customized display (as seen in some of the 3D models mentioned above).
There seem to be a few issues with the USB connector and light sensor, but I haven't yet read through all of the discussions.
It's currently (Aug. '22) only a little over 20€, which seems like a pretty good price to me, considering the parts cost, time it would take to assemble a custom PCB and even the possible issues. Especially since this would be a solution to the overly optimistic color thresholds of the Vindriktning I mentioned in Inspirations/references
For adding more IAQ sensors to my network, I'm now strongly considering building a sensor without Ikea parts, like this one.
Issues and improvements
Stefan Lochbrunner • 06/18/2022 at 17:43 • 0 comments
Issues
- The PCB was a little too thick. Mine were 1.6mm nominally so better get 1.2mm.
- BME688 reads a temperature a few degrees above ambient. I was hoping the fan of the Vindriktning would cause enough air circulation to avoid this. I don't know if the sensor in the Vindriktning requires some heating like the SGP30 does and causes this or if it's just from all the electronics in such a small space.
- Sourcing SOT23-5 voltage regulators...
- Sourcing PicoBlade connectors. In the end the compatibles ones I ordered arrived also in time.
- CCS811 vs. SGP30: I was curious about the performance of both devices so I found this comparison. I think I also read somewhere else that the CCS811 should be more stable. However, my experience was the opposite, with the CCS811 constantly drifting.
- The SGP30 seems to be very susceptible to humidity. After running the AC and opening a door or window the humidity increases and the TVOC/eCO2 values go through the roof. After a few minutes they seem to stabilize again.
Future improvements... maybe?
- Move BME688 to the outside or up against the perforated back wall of the sensor. Or just set a tempoffset in Tasmota.
- I wanted to modify the 3D printed mounts for the LED breakouts to be a mask showing the type of measurement, such that the LED light would project "CO2" or "VOC" in different colors through the Vindriktning front plate. Unfortunately, the writing would be too small for my printer, so maybe I'll have to order them somewhere or get a smaller nozzle.
3D printed holders for the WS2812 breakout with masks for text
Edit 2022-08-10:
This nicely shows the effect I was going for with the modified LED mounts.
Inspirations/references
Stefan Lochbrunner • 06/18/2022 at 15:54 • 0 comments
When researching ways to go about modifying an IKEA Vindriktning I found these links quite helpful:
- Sören Beye's original mod on GitHub
- @lond's #IKEA Vindriktning PCB
- Michi Lehr's build including a CCS811 sensor
- Blakadder's build with all the sensors, especially the tip to use the tasmota-allsensors build in order to not have to build a custom Tasmota version
- Usage of WS2812s with Tasmota
- List of Tasmota compatible sensors
Just now I came across @Catalin Sanda's #IKEA Vindriktning Daughterboard... if only I had found this sooner...

On the software side I used
- Tasmotizer to flash tasmota-allsensors (see above)
- and followed Jon Oxer's instructions on setting up MQTT, NodeRed, InfluxDB and Grafana
~~I read somewhere that~~ Apparently the Vindriktnings color thresholds are a bit optimistic so I tried to find more reliable ones for PM2.5, VOC and CO2 but I'm not very happy with the results:
If you have a good source, please leave a comment.

---

Edit 2022-06-22: Added link about Vindriktning color thresholds.
Edit 2022-08-29: Just came across this thread on home-assistant.io with a list of even more builds.

View all 3 project logs

Build Instructions

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1

Assemble base PCB with ESP-12, connectors, etc.
2
Flash the ESP-12 firmware
1. Bridge the solder jumper on the back of the base PCB according to your serial adaptors voltage.
2. Connect serial adaptor. The staggered holes in the PCB should allow you to just plug in a cable without the need to solder headers
3. Flash firmware (Tasmota, ") using desired tool (Tasmotizer)
4. Remove solder bridge if it is too big to insert the base PCB into the Vindriktning case
3

Solder 5-pin connector to Vindriktning PCB

View all 12 instructions

Discussions

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