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Toon origineel

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  • 16/02/2021

    Everything was ok with the shipping. The soldering of the pins was a little difficult. It works ok together with a TTGO ESP32. Measurements are between 400 and 1000 ppm in a room were I work. Only drawback when working on battery the measurements go to maximum, current consumption is around 150-180 mA so maybe battery is weak.

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  • 16/12/2020

    datasheet in some aspects misleading. Finally I got it working. It now shows reasonable results. Quality looks good.

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  • 03/03/2021

    Works as expected. The readings looks like are reasonable

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  • 14/02/2021

    Everything is OK.

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  • 27/02/2017

    Hi All, It can be hooked up to a simple usb/serial converter (only 4 wires required). Make sure the data lines (Tx and Rx) use 3V signalling. Running a simple powershell script the data is displayed. Script: [Byte[]] $request = 0xff, 1, 0x86, 0, 0, 0, 0, 0, 0x79 [Byte[]] $res = 0, 0, 0, 0, 0, 0, 0, 0, 0 $port = new-Object System.IO.Ports.SerialPort COM57,9600,None,8,one $port.Open() $port.Write($request, 0, 9) Start-Sleep -Milliseconds 50 For ( $i = 0; $i -lt 9; $i++ ) { $res[$i] = $port.ReadByte() } Write-Host "CO2: $($res[2] * 256 + $res[3]) ppm, Temp: $($res[4]-40) C" $port.Close() Display: CO2: 876 ppm, Temp: 24 C If you try it, please set the port parameter (COM57 in my case) according to your system. Bleph

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  • 08/07/2017

    Seems to do what it says on the box. Inside with a gas heater (with flue) on I got (with the script above, cheers) an uncomfortably high reading >1200ppm so I took it outside and got 385ppm after a few minutes, which seems right. So I have a window open now :-)

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  • 17/01/2017

    Works as specified, worm up phase is longer than 3 minutes, but under 5 min. Supplycurrent is quit high with peaks, but on average also as specified.

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  • 28/02/2018

    it arrived in 2 weeks, in a good packaging. It works well. good deal.

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  • 09/10/2019

    Veio jogado dentro do pacote, sem proteção. Mas chegou ok. Não testei ainda.

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  • 01/04/2019

    хороший товар

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