node-red-contrib-minelert-universal-io/analog-in.js

Node-RED nodes for Universal IO Gateway and I/O Modules

const { EventBus, logInfo } = require('@minelert-smartlink/common');

module.exports = function(RED) {
    function AnalogInNode(config) {
      RED.nodes.createNode(this, config);
      const node = this;
  
      const gatewayNode = RED.nodes.getNode(config.gateway);
      const moduleId = config.moduleId || 'MOD-XXXX';
      node.channelValues = [null, null, null, null]; // Channel 0–3
  
      if (!gatewayNode) {
        node.error("Gateway not configured");
        return;
      }

      function onAnalogReading(data) {
        if (data.moduleId === moduleId && data.ioType === 'ai') {
          node.send({ 
            // topic: `analog-in/${moduleId}/channel/${data.channel}`,
            payload: { 
              value: data.value,
              channel: data.channel,
              unit: 'mA'
            }
            // raw: data
          });

          node.channelValues[data.channel] = data.value;

          // Log or send to serial/gateway here
          node.status({ fill: "green", shape: "dot", text: `CH${data.channel}: ${data.value}` });
        }
      }
  
      // Subscribe to event bus
      EventBus.on("io-channel-event", onAnalogReading);
  
      node.on("close", () => {
        EventBus.off("io-channel-event", onAnalogReading);
        node.status({});
      });
    }
  
    RED.nodes.registerType("analog-in", AnalogInNode);
  };