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

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

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

module.exports = function(RED) {
    function AnalogOutNode(config) {
      RED.nodes.createNode(this, config);
      const node = this;
  
      const gatewayNode = RED.nodes.getNode(config.gateway);
      const moduleId = config.moduleId || 'MOD-XXXX';
      let channel = Number(config.channel) || 0;
      node.channelValues = [null, null, null, null]; // Channel 0–3
  
      if (!gatewayNode) {
        node.error("Gateway not configured");
        return;
      }
  
      node.on('input', (msg, send, done) => {
        const ch = msg.payload.channel
        const value = msg.payload.value || 20

        channel =  (typeof ch === 'undefined') ? channel : ch;

        if (typeof channel !== 'number' || channel < 0 || channel > 3) {
          node.error(`Invalid channel: ${channel}`, msg);
          if (done) done();
          return;
        }

        node.channelValues[channel] = value;

        // Log or send to serial/gateway here
        node.status({ fill: "green", shape: "dot", text: `CH${channel}: ${value}` });
  
        const command = {
          current: value,
          channel: channel,
          moduleId: moduleId,
        };

        const topic = `smartlink/commands/${moduleId}/analogOutput`

        logInfo(`Analog Output Command ${JSON.stringify(command)}`);

        EventBus.emit('send-command', {topic, command});

        if (done) done();
      });
  
      node.on('close', () => {
        node.status({});
      });
    }
  
    RED.nodes.registerType("analog-out", AnalogOutNode);
  };