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HomeKidd / ESP8266-HomeKit-Air-Quality-Sensor-Elgato-Eve-Room

ESP8266 based  Homekit Indoor Air Quality sensor that acts like Eve Room🌱
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support #7

Closed GWan1234 closed 4 years ago

GWan1234 commented 4 years ago

Thanks for this project. Does it support cheap air sensors now?

auto-comment[bot] commented 4 years ago

Thank you for raising an issue and helping me out with finding bugs or requesting new features. We will try and get back to you as soon as possible. Until that You might find the solution in the Wiki page or maybe find others facing the same issue as You in the Closed Issues!

GWan1234 commented 4 years ago

I have finished the PCB production, now I am very annoyed because the cost of the air sensor is too high, is there any air sensor that can be replaced without changing the PCB? That would be great If you can help me solve it.

HomeKidd commented 4 years ago

Hi! Thanks 🙌 Sorry but i’m not planning to add support for cheaper sensor since there no option for a good CO2 sensor:

BME680 also 10$+ and it cannot measure CO2, only Air quality index.

CCS811 also 10$+, it can measure CO2, but if you restart it in bad air, it will save it as a baseline and thinks that the bad air is good.

MH-Z19 sensors are the best CO2 sensors, but they are also 18-20$+ and these are as big as the whole PCB...

MQ series gas sensors are cheap, but these are really bad and inaccurate, analog sensors. Also burn-in period nedeed for 48 hours in special conditions.

SGS30 sensors are also 10-12$+ sensors, maybe these can work but i’ve never used them and i’ve read these are also not too accurate.

IAQ Core C costs 18-21$ on AliExpress and this is the only sensor that fits the PCB!

Also the the sensor required for this project is linked at least 3 times in the Wiki. Like here where i’ve explained why i’ve used this sensor. Before i buy anything for a project i always check the part list and the prices and if its too expensive for me i dont order any PCB or part.

If you can find a better sensor, that uses I2C bus protocol and can fit the PCB size and your budget feel free to open a new issue🙌

GWan1234 commented 4 years ago

Okay thank you