node-modbus-serial
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yaacov
A pure JavaScript implemetation of MODBUS-RTU (and TCP) for NodeJS
I am observing a 500ms delay between any read command (FC1, FC2, FC3 or FC4) and its respective CRC. Is this behaviour expected? It seems odd. 
Modbus TCP specification determines that only one modbus request needs to be inside a TCP Frame or packet. Looks like that node-modbus-serial don't use any kind of mechanism to ensure...
Hi All, I try to implement the TCP method this for a Homey device with multiple SUB-devices. Because of that I need the connection to be closed after data exchange....
Hello everyone, I am connecting to a Modbus simulation through Modbus TCP. If I don't read any address, after 100 seconds of connection, the event client.on("close", () => {}) will...
How can I use isDebugEnabled to check the raw data? I see that isDebugEnabled is not exposed by the ModbusRTU class.
Hello, I have created a great wrapper over modbus, yaacov/node-modbus-serial are the only one driver for now:) https://github.com/yarosdev/modbusdb If you dont mind, pls check it, and could you place a...
I have an error when im trying to close the port. this.modbusClient.close() --- ``` node:internal/errors:496 Uncaught (in promise) Error: Unhandled error. (SerialPortError { name: 'SerialPortError', message: 'Illegal invocation', errno: 'ECONNREFUSED',...
Hi everybody, so I am new to this topic and got stocked. I have the case that I have to control 8 devices with 8 different ip addresses. So if...
Hello everyone, We're trying to query holding registers from a device connected to a Windows PC through a serial port DB9 Halfduplex ( Dual wire RS-485 Dual wire RS485). The...
The ModbusRTU instance [can emit error events](https://github.com/yaacov/node-modbus-serial/blob/ac78f255b2458691b6e7243c76cee6686ae36c9b/index.js#L552) since #380. If that error event is not listened for, [by default the whole processes crashes](https://nodejs.org/api/events.html#error-events). The `on('error', ..)` handler is not available...
