Tuesday, April 5, 2022
HomeElectronicsDistant Industrial VOC Sensor Utilizing Ethernet - Information

Distant Industrial VOC Sensor Utilizing Ethernet – Information

We’re testing out how a lot soldering actually modifications air high quality utilizing the MicroMod Ethernet Operate board and the MicroMod Environmental Operate board!




For some time now, I have been curious simply how poor the air high quality round me will get once I’m soldering. It by no means actually feels prefer it’s that good, and I at all times attempt to restrict the my time and publicity to the fumes, however it could be fascinating to really collect the numbers.

When the brand new MicroMod Ethernet Operate board got here throughout my desk, I knew it could be ultimate for testing out this curiosity (and never simply due to the dearth of soldering wanted to set the challenge up!). I wished to make use of the Ethernet perform board with the Environmental Operate board and the MicroMod Teensy Processor because it’s most likely the quickest technique to put collectively this challenge. The Ethernet provides worth to the challenge as a result of it makes it relevant in an end-use industrial setting. It might be nice to observe the air high quality of the soldering station right here at SparkFun all day, from my desk, as folks come and go to solder. I selected the Teensy Processor board as they have a very easy Ethernet library to make use of for this W5500 chip.

The Hookup

The Hookup is about so simple as it will get! All you want is a screwdriver. Nevertheless, I’ll say that when utilizing two perform boards like we’re doing, it is essential to verify they’re totally set within the M.2 connector, and in addition to tighten all the screws equally (not transfer from one to the opposite).

alt text

The Code
The code can be pretty easy, it is only a combination of making an online server and sending the VOC ranges from the SGP40 to that server.

  Industrial air high quality distant sensor

 A easy internet server that reveals the VOC ranges utilizing a Teensy Processor board,
 the MicroMod Ethernet Operate board and the MicroMod Environmental Operate board. 

 Taken by Paul Clark's SGP40 code and the inbuilt Arduino instance for an Ethernet
 internet server, because of David A. Mellis, Tom Igoe and Arturo Guadalupi


#embody <SPI.h>
#embody <Ethernet.h>
#embody "SparkFun_SGP40_Arduino_Library.h" // Click on right here to get the library: http://librarymanager/All#SparkFun_SGP40
#embody <Wire.h>

// Enter a MAC handle and IP handle to your controller beneath.
// The IP handle might be dependent in your native community:
byte mac[] = {
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
IPAddress ip(192, 168, 1, 177);

SGP40 mySensor; //create an object of the SGP40 class

// Initialize the Ethernet server library
// with the IP handle and port you need to use
// (port 80 is default for HTTP):
EthernetServer server(80);

void setup() {
  Ethernet.init(10);  // For the Teensy

  // Open serial communications and anticipate port to open:
  whereas (!Serial) {
    ; // anticipate serial port to attach. Wanted for native USB port solely
  Serial.println("Ethernet WebServer Instance");

  // begin the Ethernet connection and the server:
  Ethernet.start(mac, ip);

  // Test for Ethernet {hardware} current
  if (Ethernet.hardwareStatus() == EthernetNoHardware) {
    Serial.println("Ethernet defend was not discovered.  Sorry, cannot run with out {hardware}. :(");
    whereas (true) {
      delay(1); // do nothing, no level working with out Ethernet {hardware}
  if (Ethernet.linkStatus() == LinkOFF) {
    Serial.println("Ethernet cable just isn't linked.");

  // begin the server
  Serial.print("server is at ");


  if (mySensor.start() == false)
    Serial.println(F("SGP40 not detected. Test connections. Freezing..."));
    whereas (1)
      ; // Do nothing extra


void loop() {
  // pay attention for incoming shoppers
  EthernetClient consumer = server.out there();
  if (consumer) {
    Serial.println("new consumer");
    // an http request ends with a clean line
    boolean currentLineIsBlank = true;
    whereas (consumer.linked()) {
      if (consumer.out there()) {
        char c = consumer.learn();
        // should you've gotten to the top of the road (acquired a newline
        // character) and the road is clean, the http request has ended,
        // so you'll be able to ship a reply
        if (c == 'n' && currentLineIsBlank) {
          // ship a typical http response header
          consumer.println("HTTP/1.1 200 OK");
          consumer.println("Content material-Sort: textual content/html");
          consumer.println("Connection: shut");  // the connection might be closed after completion of the response
          consumer.println("Refresh: 5");  // refresh the web page robotically each 5 sec
          consumer.println("<!DOCTYPE HTML>");
          clinet.println("VOC Index is");
          consumer.println("<br />");
        if (c == 'n') {
          // you are beginning a brand new line
          currentLineIsBlank = true;
        } else if (c != 'r') {
          // you have gotten a personality on the present line
          currentLineIsBlank = false;
    // give the net browser time to obtain the information
    // shut the connection:
    Serial.println("consumer disconnected");


Okay, time to check it out and see how the air high quality modifications after we solder! I discovered that it took a little bit of time for the SGP40 to only calibrate to the room’s pure VOC stage. And there is most likely some particular distance that the sensor ought to sit from the soldering station, however I believed since I sit so near the fumes, the sensor needs to be equally shut. Seems, even with the lead free solder, the VOC ranges nonetheless skyrocketed above the traditional VOC numbers.

Project Test

I suppose I am not stunned; soldering continues to be introducing new compounds into the air that add to the VOC stage. But it surely was nonetheless a great way to construct an air high quality sensor that may be monitored from wherever within the constructing – not simply on the soldering station on the serial monitor. And on this case, ethernet was one of many quickest methods to carry this challenge into the web area. There are, after all, different methods to construct the same unit, relying on what you’ve…this might have additionally been performed with a single Ethernet perform board and a Qwiic environmental sensor. And naturally, there are at all times methods to make an HTML internet server web page extra spiffy, in order that’s one thing to discover too.

My query for you is what different functions may you selected Ethernet over different IoT protocols? When does it serve you finest? Remark beneath, thanks for following alongside, and completely happy hacking!



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