@bitpoolos/edge-modbus/bp-modbus-io-config.js

Modules to support reading Modbus devices.

/**
 Copyright (c) 2016,2017,2018,2019,2020,2021 Klaus Landsdorf (https://bianco-royal.space/)
 All rights reserved.
 node-red-contrib-modbus
 node-red-contrib-modbusio

 @author <a href="mailto:klaus.landsdorf@bianco-royal.de">Klaus Landsdorf</a> (Bianco Royal)
 */
 module.exports = function (RED) {
    'use strict'
    // SOURCE-MAP-REQUIRED
    const coreIO = require('./core/modbus-io-core')
  
    function ModbusIOConfigNode (config) {
    //   const fs = require('fs-extra')
      const UNLIMITED_LISTENERS = 0

  
      RED.nodes.createNode(this, config)
  
      this.name = config.name
      this.path = config.path
      this.format = config.format
      this.addressOffset = config.addressOffset
  
      const node = this
      node.setMaxListeners(UNLIMITED_LISTENERS)
      node.lastUpdatedAt = null
      const lineReader = new coreIO.LineByLineReader(node.path)
      coreIO.internalDebug('Read IO File ' + node.path)
      node.configData = []

  
      lineReader.on('error', function (err) {
        coreIO.internalDebug(err.message)
      })
  
      lineReader.on('line', function (line) {
        if (line) {
          node.configData.push(JSON.parse(line))
        }
      })
  
      lineReader.on('end', function () {
        node.lastUpdatedAt = Date.now()
        coreIO.internalDebug('Read IO Done From File ' + node.path)
        node.warn({ payload: coreIO.allValueNamesFromIOFile(node), name: 'Modbus Value Names From IO File', path: node.path })
        node.emit('updatedConfig', node.configData)
      })
  
      coreIO.internalDebug('Loading IO File Started For ' + node.path)
  
    //   node.watcher = fs.watchFile(node.path, (curr, prev) => {
    //     coreIO.internalDebug(`the current mtime is: ${curr.mtime}`)
    //     coreIO.internalDebug(`the previous mtime was: ${prev.mtime}`)
  
    //     if (curr.mtime !== prev.mtime) {
    //       coreIO.internalDebug('Reload IO File ' + node.path)
    //       node.configData = []
    //       delete node.lastUpdatedAt
  
    //       const lineReader = new coreIO.LineByLineReader(node.path)
    //       lineReader.on('error', function (err) {
    //         coreIO.internalDebug(err.message)
    //       })
  
    //       lineReader.on('line', function (line) {
    //         if (line) {
    //           node.configData.push(JSON.parse(line))
    //         }
    //       })
  
    //       lineReader.on('end', function () {
    //         node.lastUpdatedAt = Date.now()
    //         coreIO.internalDebug('Reload IO Done From File ' + node.path)
    //         node.warn({ payload: coreIO.allValueNamesFromIOFile(node), name: 'Modbus Value Names From IO File', path: node.path })
    //         node.emit('updatedConfig', node.configData)
    //       })
  
    //       coreIO.internalDebug('Reloading IO File Started For ' + node.path)
    //     }
    //   })
  
    //   node.on('close', function (done) {
    //     fs.unwatchFile(node.path)
    //     node.watcher.close()
    //     done()
    //   })
    }
  
    RED.nodes.registerType('bp-modbus-io-config', ModbusIOConfigNode)
  }