Is it possible to connect the VCC and the GND pin of the CO2 sensor to an own external power supply so that I don't have to use the power supply that is connected to the Arduino. I...
JaneYu 2016-09-12 13:47:57 18 Views70 Replies Is it possible to connect the VCC and the GND pin of the CO2 sensor to an own external power supply so that I don't have to use the power supply that is connected to the Arduino. I have to much sensors on my Arduino so that the external power supply of the Arduino isn't suffient enough. If your answer is yes what kind of power supply do you advise to connect directly on the VCC and GND pins of the CO2 sensor?
Kind regards
Barry
Hello; I started using the sensor and I did the calibration without any problems. I have a problem. The value is 330ppm in the room environment and it works without any problems, but when the Arduino is turned off and on, the value becomes 0 or gives a meaningless expression. When we press the reset button on the Arduino, it returns to the normal value. What could be the reason for this?
JaneYu May I ask do you supply 7~12V via VIN or barrel jack of the Arduino? An abnormal value is most likely due to insufficient power supply to the sensor.
what is the input voltage tolerance value in SEN0159?the distance between 5v and above
JaneYu Sensor voltage input range of 3.7~5V
I have a SEN0159 powered by 5volt external power supply sending signal to esp32-c3. are there any issues with using a voltage divider to limit voltage to esp32.
JaneYu As of now, we have not encountered any issues using a voltage divider with the ESP32 C3. The process should be similar to that with any other 3.3V microcontroller.
If there is a scenario in which the sensor needs to be turned off and on periodically for about 15 minutes, is it not possible to obtain a stabilized value because it cannot be warmed up for 48 hours?
JaneYu The 24~48 warm up only have to be done when you first use the sensor.
If you need to shut down the sensor for 15 minutes, then everytime you turn on the sensor, you need to wait 5minutes to get the accurate value return.
Hi is there a tutorial of how i can connect this with my ESP 32 board? Please help thanks.
JaneYu Sorry, we donot recommend this sensor to use along with the ESP32 board.
Because the output range of the sensor is 0-5V, while the ESP32 could only accpet the Analog Voltage from 0 to 3.3V.
You could take a look at this CO2 sensor that could compatible with the ESP32:
https://www.dfrobot.com/pro...
Hi, I am using this sensor to build an air quality monitor using arduino mkr1010 as my microcontroller. I have an issue with the co2 curve, I tried using the function "map" to get the co2 ppm value but since the co2-voltage curve is decreasing when I blow air to the sensor, the co2 value that I am showing is decreasing instead of increasing.
JaneYu Hi,
My analog pin voltage measurement after preheating for 48 hours (without dividing it by 8.5) is 0.92V. Is it okay or not?
JaneYu You need to use an external power source to get the sensor to work properly, and you can test it by breathing into it.
Hi,
I copied the sample code and run it on my ESP32 but the result only show <400 ppm, even after heating it for 48 hours to get the zero point voltage. How do I fix this?
JaneYu Hi,
My co2 sensor has been sitting on the shelf a little while. I picked it up and was getting reliable fluctuations in the reading when breathing on it. All of a sudden this stopped and no matter what I did the reading stayed around 900ppm.
JaneYu Hi, Check whether the sensor uses a stable external power supply.
Hi Plerre,
Yes, the range for this sensor is 0 - 10000 ppm
JaneYu What do I need to change from the example program on the website https://wiki.dfrobot.com/CO... to be able to measure <400 ppm? because in the example program it only displays results <400ppm if the ppm value is <400. Thank you for the help
Hi Katie,
Yes, you are right, you need to leave it for 48 hours for the first time, check the reading with a voltmeter then divide the
reading by 8.5 and use it in your code definition.
JaneYu Hello,
Can you send some pictures and vedios to [email protected]? i'll check it
Thank you!!
JaneYu the problem is the output is 654mV and on the data sheet the output voltage range is between 30-50mV. So i have no idea what s really happening.
JaneYu Hello DFRobot Support.
How long is the useful life of this sensor ?
Is it normal to always feel very hot?
I use it with an arduino Uno to 5v, if I do not want it to be on all the time, how long do I need to wait for it to warm up since I turn it on, 48 hours each time?
Regards
JaneYu Hi,
It's normal that the sensor gets hot. Cause the sensor will heating while working.
Not everytime, 48-hours is just for calibration.
Hi DFRobot Support,
I just received my CO2 sensor yesterday. I don't know what value should I set for the threshold value using the potentiometer onboard ?
For the current time, I am trying to calibrate the sensor using Arduino, but later I will need to program it and use it with myRI. But, myRIO maximum input voltage is 3.3 V, while this sensor module would output a voltage range of 5.1-0.85 after amplifying. So, is there a method to decrease the output voltage and use it with myRIO ???
JaneYu Also, I have a question. How does the digital pin output relate to the threshold value ? and is it self-programmed digital output ?
Sorry,
I want to work with the analog pin to measure the CO2 concentration, do I always have to split the output voltage to 8.5, and if so why?
JaneYu No, you needn't.It just a calibration process.You only need to calibrate once at the beginning of use, and then it can be used normally.
Can u help with setting up this sensor on raspberry. As i know this sensor have digital output.
JaneYu Please check out the wiki page: https://www.dfrobot.com/wik.... The connecting diagram shows the location of digital pin.
