Implementation of new Sensirion SEN-5X sensors

We made a firmware with SEN5X and we are testing 10 sensors, some emulate SPS30 and SHT3X
You can download the bin files on the /bin directory and flash the sensor with FalshESP8266.exe

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I will give it a try! I already had a look at your project. Interesting…
I live very close to Schiphol (and the A9 highway.) I can even smell the jet fuel occasionally. There are only a very few stations in my area, so time to pay attention to pollution through a citizen project. (Although ‘fijnstof’ is not the biggest risk in my area…)

It works… (just a temp indoor setup to test the electronics / SW)
Thanks Fred (and the community of course ) !!!

Interesting to see the differences between the SDS011 and the SENS-55…

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Hi fredvduin,
sadly the FlashESP8266.exe from your Github does not work. Using Win11 23H2

Informationen über das Aufrufen von JIT-Debuggen
anstelle dieses Dialogfelds finden Sie am Ende dieser Meldung.

************** Ausnahmetext **************
System.ComponentModel.Win32Exception (0x80004005): Das System kann die angegebene Datei nicht finden
   bei System.Diagnostics.Process.StartWithShellExecuteEx(ProcessStartInfo startInfo)
   bei System.Diagnostics.Process.Start(ProcessStartInfo startInfo)
   bei FlashESP8266.Form1.bttn_flash_Click(Object sender, EventArgs e)
   bei System.Windows.Forms.Control.OnClick(EventArgs e)
   bei System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   bei System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   bei System.Windows.Forms.Control.WndProc(Message& m)
   bei System.Windows.Forms.ButtonBase.WndProc(Message& m)
   bei System.Windows.Forms.Button.WndProc(Message& m)
   bei System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

************** Geladene Assemblys **************
    Win32-Version: 4.8.9232.0 built by: NET481REL1LAST_C.
    CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/mscorlib.dll.
    CodeBase: file:///C:/Users/andre/Downloads/Neuer%20Ordner/FlashESP8266.exe.
    Win32-Version: 4.8.9181.0 built by: NET481REL1LAST_C.
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll.
    Win32-Version: 4.8.9236.0 built by: NET481REL1LAST_B.
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll.
    Win32-Version: 4.8.9032.0 built by: NET481REL1.
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll.
    Win32-Version: 4.8.9032.0 built by: NET481REL1.
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll.
    Win32-Version: 4.8.9236.0 built by: NET481REL1LAST_B.
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll.
    Win32-Version: 4.8.9032.0 built by: NET481REL1.
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll.
    Win32-Version: 4.8.9032.0 built by: NET481REL1.
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms.resources/v4.0_4.0.0.0_de_b77a5c561934e089/System.Windows.Forms.resources.dll.
    Win32-Version: 4.8.9032.0 built by: NET481REL1.
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/mscorlib.resources/v4.0_4.0.0.0_de_b77a5c561934e089/mscorlib.resources.dll.

************** JIT-Debuggen **************
Um das JIT-Debuggen (Just-In-Time) zu aktivieren, muss in der
Konfigurationsdatei der Anwendung oder des Computers
(machine.config) der jitDebugging-Wert im Abschnitt festgelegt werden.
Die Anwendung muss mit aktiviertem Debuggen kompiliert werden.

Zum Beispiel:

    < jitDebugging="true" />

Wenn das JIT-Debuggen aktiviert ist, werden alle nicht behandelten
Ausnahmen an den JIT-Debugger gesendet, der auf dem
Computer registriert ist, und nicht in diesem Dialogfeld behandelt.

you need file esptool.exe

FlashESP8266.exe need this file

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Thanks, that worked :slight_smile:

I will use your firmware for SEN55 too, since I have an urgent VOC monitoring problem in Zoutleeuw/Belgium, & I was expecting to have the latest release supporting the SEN55 by now, but clearly something intervened…
Thank you!
Can you supply me with one of your API # in test, I’m developing a display for, and need to have an example of the JSON messages with SEN55 data, for testing, while I don’t have a meter with SEN55 myself now.
BTW, nice work, proficiat. I whish i was there already … (started in october 2023, aiming at having DNMS & a self-designed display working by now…)
And in the process, found out about the SEN55…

We use MQTT and is implemented in our firmware

“SEN55_P0”: “4.98”,
“SEN55_P2”: “5.23”,
“SEN55_P4”: “5.23”,
“SEN55_P1”: “5.23”,
“SEN55_N05”: “33.82”,
“SEN55_N1”: “39.06”,
“SEN55_N25”: “39.14”,
“SEN55_N4”: “39.15”,
“SEN55_N10”: “39.16”,
“SEN55_TS”: “0.40”,
“SEN5X_temperature”: “23.13”,
“SEN5X_humidity”: “50.85”,
“SEN5X_NOx”: “1.00”,
“samples”: “2870”,
“min_micro”: “50069”,
“max_micro”: “99486”,
“interval”: “145000”,
“signal”: “-46”,
“SEN5X_VOC”: “96.80”

Monitoring VOC and NOx: MQTT => Mosquitto server => NodeRed => MariaDB => Grafana

@Rik_Drabs When using the SEN5x please remember that the VOC values are index values and only “valid” for a single location. With auto calibration this value may even not be comparable over a longer time even on the same location …

Where can I get a cable for SEN55 at a favourable price? I can only find offers on the Internet that are just as expensive with shipping as the SEN55 itself. The cheap solution of making a plug myself failed because it is too fine and small.

I have bought them from Ali

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I have connected the SEN55 to Tasmota. I find this sensor rather disappointing. Supposedly there are almost or exactly the same values for the different particle sizes.

SEN5X PM 1 µm 1,9 µg/m³
SEN5X PM 2,5 µm 2,0 µg/m³
SEN5X PM 4 µm 2,0 µg/m³
SEN5X PM 10 µm 2,0 µg/m³

I switched on a hoover in a small room and the values go up, but remain very similar to each other.

SEN5X PM 1 µm 9,6 µg/m³
SEN5X PM 2,5 µm 10,5 µg/m³
SEN5X PM 4 µm 10,9 µg/m³
SEN5X PM 10 µm 11,0 µg/m³