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Hi,
in code I've that:
if (node.client && node.client.isOpen && node.client.isOpen())
to check for close or not
but sometimes:
TypeError: Cannot read property 'isOpen' of undefined
Idea w…
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How to implement Modbus TCP protocol using modbus-serial?
Its has modbus over tcp, etc.
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Hi,
you have some handling of PDU for TCP but not for Serial.
Result of testing ModbusRTU and ASCII: serial doesn't work in my case
The handling with endian isn't ready:
there is just ...BE for BIG-…
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I created an expressjs route that when called does:
Simplified version:
`app.get('/modbus', function(req, res){
let client = new ModbusRTU();
// open connection to a tcp line
client.connectTC…
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I'm getting `Data length error` messages when trying to make multiple reads via serial.
I have a really simple setup, a rPi with a USB FTDI RS485 adapter linked to a single modbus slave.
It either f…
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I wanted to use software serial instead of hardware serial because I wanted to send data to my computer via hardware serial, so I studied your library. I discovered that you used serial.flush() in you…
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Hello I just managed to build a simple Modbus communication between a master (Raspberry) and a Slave a Arduino used your Library. Now I want to read and write a boolean (or in Modbus terms a "coil") v…
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I want open tcp-connection, read some values and close connection.
Probably all ports in ./apis/connection.js must return "this._port" to implementation it, like below
```
cl.connectTCP = function (…
abc-z updated
8 years ago
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Hi
I am new to PLC, Can i use your server code as a replacement of kepserver, can your code directly communicate with plc, is there any specific driver support ??
kashp updated
7 years ago
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my installation it is very extensive. I'm about to try using PJON as protocol, but using rs485 like interface.
Analyzing the code I see very optimal to send commands as I need.
I'm trying to control r…