How has the sensor been working for you so far? Have you done any testing against other sensors to confirm the accuracy of yours? Also are the values from your sensor logged in HA for any period of time? I'm hoping to find some way to view trends based on different activates in my home over longer periods of time i.e. weeks or months
Honestly, not great... The values seem tp be all over the place but yes, HA logs them for long periods. There were some other ones recommended to try out like the MICS-6814 but I haven't had the time to do so.
I've bought one a few months ago. I find the sensor to be very flaky. I did a similar test with some scented sticks in a glass jar and it took quite long for the sensor to spike. It was more of a gradual increase and same for the decrease when I took the sensor out of the glass. Not a nice spike as in your video. I've read somewhere that the ZE07-CO does a better yob, but I couldn't get any data out of it so far. This inspires me to try both sensors again tomorrow 🙂.
I'm not familiar with the ZE07 sensor but I might order one to give it a go. There is also another one that I want to try, the MICS-5524. In my case the readings are taken once every 2,5 min, because of the heating/cooling cycles so maybe that is why you see a spike. Also, I guess that the scent sticks would produce a lot more airborne particles like PM2.5 and PM10 instead of CO gas as they are not burning that much.
@@TasteTheCodemics-5524 seems to be general voc sensor so it has low selection to CO while ze07 looks like to be more specialised on CO only. Also you should know that the whole MQ series (includes about 10 different sensors) is actually all the same sensor with only difference is they have different resistors. I mean MQ series just reacts to any gas with carbon, therefore your sensor will also react to any such gas and its readings would not be selective to solely CO. And of course you can not measure CO with it with any degree of precision. It can just tell whether there is more carbon in the air or less. MQ sensors also have about 1 year (do not remember exact number) of lifetime while on the fresh air due to carbonisation of sensor material, and it does not matter whether it worked for that time or just layed down powered off. As for ZE07 they claim this sensor to have good selectivity but do not provide any additional data on selectivity in datasheet There is also CO sensor from Gravity but it's quite expensive. They claim this sensor to have good selectivity and even provide selectivity table in datasheet (thought there is still influence of other gases remain)
@@binariti Hey, thanks for the great info. I still haven't looked into other sensors but I will definitely do. I'm aware of the different MQ series sensors but I was unaware of their shelf life so I'll research this a bit more. Thanks again!
@@TasteTheCode sure, please help for mq2 / mq5. The goals is utilize it for LPG / flammable gas detector. For now as I know so far, the community only output the sensor as gas percentage (%)
@TasteTheCode Oh thank you. Do you think changing the transistor causes a significant change in the circuit? I'm planning to use a BSN254 transistor. Will that work?
How has the sensor been working for you so far? Have you done any testing against other sensors to confirm the accuracy of yours? Also are the values from your sensor logged in HA for any period of time? I'm hoping to find some way to view trends based on different activates in my home over longer periods of time i.e. weeks or months
Honestly, not great... The values seem tp be all over the place but yes, HA logs them for long periods. There were some other ones recommended to try out like the MICS-6814 but I haven't had the time to do so.
Nice job
Thanks!
nice job, Dude
Thanks!
I've bought one a few months ago.
I find the sensor to be very flaky.
I did a similar test with some scented sticks in a glass jar and it took quite long for the sensor to spike. It was more of a gradual increase and same for the decrease when I took the sensor out of the glass.
Not a nice spike as in your video.
I've read somewhere that the ZE07-CO does a better yob, but I couldn't get any data out of it so far.
This inspires me to try both sensors again tomorrow 🙂.
I'm not familiar with the ZE07 sensor but I might order one to give it a go. There is also another one that I want to try, the MICS-5524. In my case the readings are taken once every 2,5 min, because of the heating/cooling cycles so maybe that is why you see a spike. Also, I guess that the scent sticks would produce a lot more airborne particles like PM2.5 and PM10 instead of CO gas as they are not burning that much.
@@TasteTheCodemics-5524 seems to be general voc sensor so it has low selection to CO while ze07 looks like to be more specialised on CO only.
Also you should know that the whole MQ series (includes about 10 different sensors) is actually all the same sensor with only difference is they have different resistors. I mean MQ series just reacts to any gas with carbon, therefore your sensor will also react to any such gas and its readings would not be selective to solely CO. And of course you can not measure CO with it with any degree of precision. It can just tell whether there is more carbon in the air or less.
MQ sensors also have about 1 year (do not remember exact number) of lifetime while on the fresh air due to carbonisation of sensor material, and it does not matter whether it worked for that time or just layed down powered off.
As for ZE07 they claim this sensor to have good selectivity but do not provide any additional data on selectivity in datasheet
There is also CO sensor from Gravity but it's quite expensive. They claim this sensor to have good selectivity and even provide selectivity table in datasheet (thought there is still influence of other gases remain)
@@binariti Hey, thanks for the great info. I still haven't looked into other sensors but I will definitely do. I'm aware of the different MQ series sensors but I was unaware of their shelf life so I'll research this a bit more. Thanks again!
Could you use the camera with this NCO board as well?
I haven't used a camera so far but as I know they are interfaced through SPI so I do not see why the two can't work together.
Would you doing another mq like mq2 / mq5 project?
I don't know. Maybe. Any special requests?
@@TasteTheCode sure, please help for mq2 / mq5. The goals is utilize it for LPG / flammable gas detector.
For now as I know so far, the community only output the sensor as gas percentage (%)
please write what mosfet you used
I used a 2n2222 transistor as I did not had mosfet on hand but the original article calls in for a SL2310
Could you please tell me which transistor you used?
I used a 2m2222 because that is what I had on hand. The original article asks for a SL2310 mosfet.
@TasteTheCode Oh thank you. Do you think changing the transistor causes a significant change in the circuit? I'm planning to use a BSN254 transistor. Will that work?
Hmmm I can't say for sure but I think it will not, as long as the transistor can handle it. Yours seems beefy enough.
code please
The code is available in the link from ESPDevices.