A Modbus scanner with both simple functionality and advanced features. Works for any device connected via Modbus RTU. Comes with config files for Gidrolock devices. Modbus TCP is still WIP.

Configs and auto-identification

Configs are .json files describing basic device info and data that can be polled from it. The checkEntry object in the config allows to go through every config file in a folder to detect the appropriate config.

Regular polling

This app can regularly and selectively poll entries from the config file. (Works, but still WIP)

Config fields and possible values:

{
	// Template/device name
	"name" : "Gidrolock Standard Wi-Fi RS-485",

	// Device description
	"description" : "Smart valve controller unit with wired and wireless leak sensor support",

	// the list of entries that can be polled from the device
	// each entry is a separate field that supports polling multiple registers and parsing data into UTF-8, int, etc.
	"entries" : [
		{
			// entry name
			"name": "Modbus ID",

			// register type:
			// "coil", "discrete", "input", "holding"
			"registerType": "holding",

			// starting register address 
			// begins with 0
			"address": 128,

			// number of polled registers
			// default value: 1
			"length": 1,

			// data type for parsing
			// supported data types: bool, uint16, uint32, string
			// default value: uint16
			"dataType": "uint16",

			// whether the entry should be polled again
			// if `false`, the entry will be polled only once
			"readOnce": true
		}
	],

	// unique value for a device: model ID, firmware version
	"checkEntry": {
		"registerType": "input", 
		"address": 200,
		"length": 6,
		"dataType": "string",
		
		// value after parsing
		"expectedValue": "STW485"
	}
}

To-Do

Cycle through configs in a folder to select a fitting one
Configurable regular polling
Modbus TPC support