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Uncaught TypeError: Cannot redefine property: isOpen

See original GitHub issue

Code:

if(self.client && !self.client.isOpen)
    self.client.open(onConnect.bind(self));
  else{
    var client = new ModbusRTU();

    if(self.info.tcp)
    client.connectTCP(self.info.address, { port: self.info.tcp_port }, onConnect.bind(self));
    else
    client.connectRTUBuffered(self.info.port, { baudRate: self.info.baud_rate }, onConnect.bind(self));

    self.client = client;
  }

Uncaught TypeError: Cannot redefine property: isOpen
    at Function.defineProperty (<anonymous>)
    at ModbusRTU.open (/media/daniel/DATA/MQTT_Gateway_Node/node_modules/modbus-serial/index.js:349:12)
    at setClient (/media/daniel/DATA/MQTT_Gateway_Node/modbus-reader.js:84:17)
    at Timeout._onTimeout (/media/daniel/DATA/MQTT_Gateway_Node/modbus-reader.js:101:25)
    at ontimeout (timers.js:386:14)
    at tryOnTimeout (timers.js:250:5)
    at Timer.listOnTimeout (timers.js:214:5)
ModbusRTU.open @ index.js:349
setClient @ modbus-reader.js:84
(anonymous) @ modbus-reader.js:101
ontimeout @ timers.js:386
tryOnTimeout @ timers.js:250
listOnTimeout @ timers.js:214

Issue Analytics

State:
Created 6 years ago
Comments:12 (12 by maintainers)

Top GitHub Comments

1reaction

yaacovcommented, Feb 9, 2018

v7.1.5 with #185 is published on npm

Thanks @robertsLando 👍

0reactions

robertsLandocommented, Feb 12, 2018

@yaacov I need to bind the callback function to the context of the main class to be able to access the class attributes once the callback function is triggered. I could did this without using .bind just by writing the function locally like .connect(function(err){}) but as I use it more times I have choose to create a private function inside the class.

In logger example you check the error than you close the port and you recreate one but why to close the port and create a new one when you can just call .open() method whit the already existing client? I do the reconnect in this way and it works.

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