CO₂ sensor Forum Discussions
Hi, Could you please tell me whether the schematic diagram of the LED driver circuit on the sensor is public? If possible, could you provide it for our reference?
Please let me know the cause of the noise on the I2C line of the PAS CO2 sensor.
The circuit is same of the datasheet V2.0 Fig 6. We use it as the I2C mode.
There is no noise when no I2C control.
When I2C control is started as shown below, it occurs at intervals of about 10 seconds.
According to AN_2011_PL38_2011_134235 V2.0 Fig 17, it occurs similar noise when it's PWM mode.
It's not the same mode, but is this phenomenon related?
For used the I2C communication, the 2 pin (RX) and 9 pin (PWM) set to OPEN is should be no problem?
What is the purpose of INT on Datasheet p 11?
Could you tell us more about Response Time?
Instead, our "school kit" includes a USB Type-A and a micro-USB port. The micro USB port should be used to communicate with the PC (or Raspberry Pi?). Why then do we need the Type-A port, which is even missing from the Sensor2Go Evaluation Kit? Can I simply connect the "school kit" to the Raspi via USB and then communicate directly with it, e.g. with Python? If so, with what protocol? Is there a library for this?
Unfortunately, I could not download the GUI on my Macbook because it is apparently not available for macOS. Under the search term "XENSIV PAS CO2 Sensor2Go GUI" I could not find a corresponding entry in the Toolbox Launcher, so I could not test the sensor yet on my Macbook.
Instead I downloaded the "XENSIV PAS CO2 Sensor2Go GUI" on a Windows notebook and paired the device via bluetooth. But I could not find it within the software in the window with the title "Environmental Fusion GUI", I tried everything, that came into my mind.
I was able to successfully download, install and open the Android app. My smartphone could also connect to the sensor via Bluetooth, but no connection could be established inside the app. After touching the one and only button inside the app, the button changed to grey and after a few seconds it aborted without a comment.
I would be very pleased if you could give me some help in this regard. Do I need additional hardware? Can I establish a connection directly via USB or only via a wireless connection? Does the whole thing work with Raspberry Pi's at all? Thank you very much!
Hi, could you please provide relevant papers about Infineon's CO2 sensor, or which academic website should I go to find, for example, this IEEE paper is from Infineon(https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8727851 )Show Less
When the PAS CO2 is built onto the wearable products* then the PAS CO2 is always affected of vibration and shock and can it measure the CO2 concentration accurately?
is there the particular frequency to affect the measurement?
*:Products that fit in your pocket or attach to your helmet
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