J1B3-Sensor-boxes/docs/brainstorm/SoftwareDocumentatie/Dev_page.md

parsing JSON

The data that is send by the nodes is send in json data. We chose this becouse we can easily use the data within javascript, this is called parsing. We use the parced data and send that in to the next function to make the data more acceseble to use in further instences.

      const jsonData = JSON.parse(event.data);
      // Use the parsed JSON data as needed
      handleIncomingData(jsonData);

Here is the function that receves the parced JSON data and set it into variables.

function handleIncomingData(data) {
  nodeNumber = data.node;
  temperature = data.Temp;
  humidity = data.Humi;
  CO2 = data.eCO2;
  TVOC = data.TVOC;

  processNodeData(nodeNumber, temperature, humidity, CO2, TVOC);
}

function processNodeData(nodeNumber, temperature, humidity, CO2, TVOC) { // Initialize the array for this node if it doesn't exist yet if (!sensorData[nodeNumber]) { sensorData[nodeNumber] = []; }

// Push the new data onto the array for this node sensorData[nodeNumber].push({ 'node': nodeNumber, 'temp': temperature, 'humi': humidity, 'CO2': CO2, 'TVOC': TVOC, });

// updateNodeData(node, temperature, humidity, lightIntensity) updateNodeData(nodeNumber, temperature, humidity, CO2, TVOC);

// Log the array for this node console.log(sensorData[nodeNumber]);

// If the array for this node has more than 10 elements, remove the oldest one if (sensorData[nodeNumber].length >= 10) { sensorData[nodeNumber].shift(); } }

function createNodeData(node) { // Create main div var nodeData = document.createElement("div"); nodeData.className = "nodeData";

// Create flex-NodeData div var flexNodeData = document.createElement("div"); flexNodeData.clsName = "flex-NodeData";

// Create p element var pNode = document.createElement("p"); pNode.textContent = "Node " + node;

// Append p to flex-NodeData flexNodeData.appendChild(pNode);

// Create flex-LiveData div var flexLiveData = document.createElement("div"); flexLiveData.className = "flex-LiveData";

// Create data divs (Temperature, Humidity, Light Intensity) var dataTypes = ["Temperatuur", "Luchtvochtigheid", "CO2", "TVOC"]; var ids = ["temperature", "humidity", "CO2", "TVOC"]; var statusIds = ["tempStatus", "humidStatus", "CO2Status", "TVOCStatus"];

for (var i = 0; i < dataTypes.length; i++) { var dataDiv = document.createElement("div");

  var dataTypeDiv = document.createElement("div");
  dataTypeDiv.textContent = dataTypes[i] + ": ";

  var pElement = document.createElement("p");
  pElement.id = ids[i] + node;
  pElement.textContent = "Not connected";

  dataTypeDiv.appendChild(pElement);
  dataDiv.appendChild(dataTypeDiv);

  var statusElement = document.createElement("div");
  statusElement.className = "statusElement";

  var statusText = document.createElement("p");
  statusText.className = "statusText";
  statusText.id = statusIds[i];
  statusText.textContent = "Not connected";

  statusElement.appendChild(statusText);
  dataDiv.appendChild(statusElement);

  flexLiveData.appendChild(dataDiv);

}

// Append flex-LiveData to flex-NodeData flexNodeData.appendChild(flexLiveData);

// Create flex-graph div var flexGraph = document.createElement("div"); flexGraph.className = "flex-graph";

var graphDiv = document.createElement("div");

var graphP = document.createElement("p"); graphP.textContent = "Live graph:";

var liveGraph = document.createElement("div"); liveGraph.id = "liveGraph";

graphDiv.appendChild(graphP); graphDiv.appendChild(liveGraph); flexGraph.appendChild(graphDiv);

// Append flex-graph to flex-NodeData flexNodeData.appendChild(flexGraph);

// Append flex-NodeData to main div nodeData.appendChild(flexNodeData);

// Check if nodeDataLocation element exists var nodeDataLocation = document.getElementById("nodeDataLocation"); if (nodeDataLocation) { // Append main div to nodeDataLocation nodeDataLocation.appendChild(nodeData); } else { console.error("Element with ID 'nodeDataLocation' does not exist."); } }

function updateNodeData(node, temperature, humidity, eCO2, TVOC) { // Update the temperature, humidity and light intensity values document.getElementById("temperature" + node).textContent = temperature; document.getElementById("humidity" + node).textContent = humidity; document.getElementById("CO2" + node).textContent = eCO2; document.getElementById("TVOC" + node).textContent = TVOC;

// Update the status text document.getElementById("tempStatus").textContent = "Connected"; document.getElementById("humidStatus").textContent = "Connected"; document.getElementById("CO2Status").textContent = "Connected"; document.getElementById("TVOCStatus").textContent = "Connected"; }