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Altitude Tech LTD is founded by professionals and students in the area of robotics, electronics and product design, which makes the team the heart of the company.

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  • Sensly Hat For The Raspberry Pi Air Quality & Gas Detector

    Here is the Plotly Graph setup instructions for Sensly The Raspberry Pi Hat.https://www.instructables.com/id/Setting-Up-the-Se...

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  • PiAnywhere 4G & LTE Hat for the Raspberry Pi

    Hi, I have replyied to your email.

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  • Sensly Hat For The Raspberry Pi Air Quality & Gas Detector

    The Kernel panic may have been caused by the apt-get update, upgrade and dist-upgrade commands, the reason we add this to the script is to make sure the raspberry pi is at the latest version. This is to ensure that the raspberry pi is a close to our in lab test conditions as we cannot guarantee that the install will work on earlier versions. We are sorry that you have had these issues. There is a potential to recover your information by plugging your SD card into a computer running a linux os.In response to your second comment, would it be possible to screen shot the path you save it to and the file explorer view of the file location by opening a separate terminal and using the command scrot -s then clicking on the window you want to screen shot. This will help us find the issue.In term...see more »The Kernel panic may have been caused by the apt-get update, upgrade and dist-upgrade commands, the reason we add this to the script is to make sure the raspberry pi is at the latest version. This is to ensure that the raspberry pi is a close to our in lab test conditions as we cannot guarantee that the install will work on earlier versions. We are sorry that you have had these issues. There is a potential to recover your information by plugging your SD card into a computer running a linux os.In response to your second comment, would it be possible to screen shot the path you save it to and the file explorer view of the file location by opening a separate terminal and using the command scrot -s then clicking on the window you want to screen shot. This will help us find the issue.In terms of the update.py not working it seems like the program or the board is hanging could you please try restarting the entire system and try again. If this doesn’t work could you tell me which raspberry pi you are using?Finally in terms of the output my first question would be where you did calibrate the sensors? Also I think I should point out that majority of the gases detected with the exception of CO2 shouldn’t be picked up normally if they are it would mean your home is has dangerous gases. If you would like to test the response of the sensors, you can you lighter gas to ensure that the sensor are responsiveHope this help and sorry for the delayed response

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    • PiAnywhere 4G & LTE Hat for the Raspberry Pi
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  • Sensly Hat For The Raspberry Pi Air Quality & Gas Detector

    Hi Frank, Sorry for the delayed reply. The reason for this is that the MQ7 requires a special heating cycle to detect Carbon Monoxide. This cycle is 60 seconds at 1.4V and 90 seconds at 5V. The Sensor is ready to be read during the 5V stage so to prevent it being read during the 1.4V stage we set the value it outputs during this stage to a number that would not give any ppm reading. This is why you get those very high rs/r0 values on the MQ7. Could you please let me know in what envrionment you calibrated the Sensors in?

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  • Sensly Hat For The Raspberry Pi Air Quality & Gas Detector

    What disk imager did you use to create the SD card? We recommend Win32 Disk Imager if this doesn't work could you please screen shot the problem

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  • Sensly Hat For The Raspberry Pi Air Quality & Gas Detector

    Hi VladmirS22As with most electrochemical cells they tend to drift overtime so will need recalibration approximately every 3- 6 months. That is thebest way to ensure long term accuracy. There is a pre-heating/burn-in phase required to remove theprotective coating the sensors have when we receive them from the manufacturesbut this is typically 48 hours and only has to be done once. After that wetypically recommend heating the sensor for 15 minutes to stabilize readingsbefore logging any data. Also temperature does affect the sensor readings hence whythe datasheet provides a curve to relate the change in temperature to the rs/r0value which is used to calculate PPM. The reason we have located the BME280 soclose to the sensors is to account for the increased temperature caused by theproximi...see more »Hi VladmirS22As with most electrochemical cells they tend to drift overtime so will need recalibration approximately every 3- 6 months. That is thebest way to ensure long term accuracy. There is a pre-heating/burn-in phase required to remove theprotective coating the sensors have when we receive them from the manufacturesbut this is typically 48 hours and only has to be done once. After that wetypically recommend heating the sensor for 15 minutes to stabilize readingsbefore logging any data. Also temperature does affect the sensor readings hence whythe datasheet provides a curve to relate the change in temperature to the rs/r0value which is used to calculate PPM. The reason we have located the BME280 soclose to the sensors is to account for the increased temperature caused by theproximity of the three sensors and use this to correct the rs/r0 value. Thisway we can have more than one sensor on our board

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  • Sensly Hat For The Raspberry Pi Air Quality & Gas Detector

    We are not ignoring your message just need a little time to confirm all the answer. We will get back very soon.

    We have just updated the link.

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  • AltitudeTech followed Swansong and AltitudeTech1 month ago
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      • Sensly Hat For The Raspberry Pi Air Quality & Gas Detector
    • Sensly Hat For The Raspberry Pi Air Quality & Gas Detector
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