updated readme
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README.md
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README.md
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@ -3,24 +3,31 @@
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## idea
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higher concentrations of CO2 inside will make you sleepy and have an impact on your wellbeing. during the current pandemic higher CO2 concentrations inside are also a pretty good indication for higher levels of aerosol and as such a higher risk for infection. the 'CO2 Ampel' (CO2 traffic light) will give you a visual representation of the current situation and remind you to open windows to keep you happy and healthy
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higher concentrations of CO2 inside will make you sleepy and have an impact on your wellbeing. during the current pandemic higher CO2 concentrations inside are also a pretty good indic
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ation for higher levels of aerosol and as such a higher risk for infection. the 'CO2 Ampel' (CO2 traffic light) will give you a visual representation of the current situation and remin
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d you to open windows to keep you happy and healthy
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## parts list
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| description | part | link |
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| -------------------- | ----------- | ------------------------------------------- |
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| ESP32 | ESP-32 30Pin | [Aliexpress Link ](https://de.aliexpress.com/item/32864722159.html?spm=a2g0o.productlist.0.0.6e7e745aBnlwmM&algo_pvid=b9be1fdc-113a-4e2e-aafa-4e08151af66c&algo_expid=b9be1fdc-113a-4e2e-aafa-4e08151af66c-1&btsid=0ab50f6215990625361401073eaad4&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_)|
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| Infrared CO2 Sensor | mhz-19 | [Aliexpress Link ](https://de.aliexpress.com/i/32952229446.html) |
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| Active piezzo buzzer | KY-012 | [Aliexpress Link ](https://de.aliexpress.com/item/32740686896.html?spm=a2g0o.productlist.0.0.554c8f02ZzXw5y&algo_pvid=a49664ca-1685-4d9a-b7ba-45c1fbf5a7ba&algo_expid=a49664ca-1685-4d9a-b7ba-45c1fbf5a7ba-0&btsid=0ab6f83115990618356642096e52ad&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_) |
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| Active piezzo buzzer (optional) | KY-012 | [Aliexpress Link](https://de.aliexpress.com/item/32740686896.html?spm=a2g0o.productlist.0.0.554c8f02ZzXw5y&algo_pvid=a49664ca-1685-4d9a-b7ba-45c1fbf5a7ba&algo_expid=a49664ca-1685-4d9a-b7ba-45c1fbf5a7ba-0&btsid=0ab6f83115990618356642096e52ad&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_) |
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| OLED Display | SSD1306 | |
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| LED-Ring (9 Pixel) | WS2812 | [Aliexpress Link ](https://de.aliexpress.com/item/32835427711.html?spm=a2g0o.productlist.0.0.847c3d32JLroFX&algo_pvid=32c7c01b-df4b-430e-b550-00097f15afde&algo_expid=32c7c01b-df4b-430e-b550-00097f15afde-0&btsid=0ab6f83115990618906573133e52ad&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_) |
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## build
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* solder everything according to the connection schema
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* get yourself a copy of esphome (https://esphome.io/)
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* compile the firmware with ```co2ampel=USER_ROOM esphome co2sensor.yaml run``` (replace user with a nick that identifies you or your organisation and room with the place the sensor is located at - these will be used for online graphing!)
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* get yourself a copy of esphome (https://esphome.io/) ```pip3 install esphome```
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* compile the firmware with ```co2ampel=USER_ROOM esphome co2sensor.yaml run```
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* replace user with a nick that identifies you or your organisation
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* replace room with the place the sensor is located at
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* e.g. unhb_hackspace or unhb_001 for obfuscation
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* these will be used for online graphing! if sensor has wifi access
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* hold boot on your esp32 until fw upload starts.
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## setup
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@ -31,7 +38,7 @@ higher concentrations of CO2 inside will make you sleepy and have an impact on y
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## grafana
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there is a quick setup on http://co2.cyber23.de:3000/d/1axlpIdGk/co2?orgId=1&refresh=10s your sensor should apper in the list on the left as soon it is connected via wifi
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there is a quick setup on [here](http://co2.cyber23.de:3000/d/1axlpIdGk/co2?orgId=1&refresh=10s&var-co2name=smash_wohnzimmer&from=now-2d&to=now) your sensor should apper in the list on the left as soon it is connected via wifi.
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### schema
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@ -65,18 +72,16 @@ either way it might be a good idea to have a capacitor between VCC and GND. my p
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## readings for inside rooms
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| CO2 measure | light | buzzer | meaning |
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| ----------- | ------ | ------ | --------------------------------------------------------------------------------- |
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| 400 ppm | none | no | more or less the baseline of the sensor hardware and means 'fresh air quality' |
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| 400-800ppm | none | no | safe zone and can be considered good air quality |
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| 800-1500ppm | yellow | no | warning zone (consider to open windows) and is between medium and bad air quality |
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| > 1500ppm | red + blink | no | bad air quality, ppl in the room will be affected in a negative way |
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| CO2 measure | light | buzzer | meaning |
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| ----------- | ----------- | ------ | --------------------------------------------------------------------------------- |
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| 400 ppm | none | no | more or less the baseline of the sensor hardware and means 'outside air quality' |
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| 400-800ppm | none | no | safe zone and can be considered good air quality |
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| 800-1000ppm | yellow | no | warning zone (consider to open windows) and is between medium and bad air quality |
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| > 1000ppm | red + blink | no | hygienic bad air quality, chance for infections rise |
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## todo
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- [ ] cooldown time for buzzer (alarm only once every n minutes) -> lambda/interval/on_time?
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- [x] add openings for mh-z19 to the case
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- [x] adjust light tunnel to use frosted acrylic glass
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- [ ] add a silent switch for meeting rooms and such (no buzzer, but flash at a regular interval to attract attention)
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