Hi Fellow DIY'ers
Im currently building a hvac control system for a piggery where ill control all the fans using dashboard, rpi5, usb-rs485, modbus etc. here is my sample code, enjoy if you can use some of it for your projects.
{
"id": "0ffd7e16e625f993",
"type": "modbus-flex-getter",
"z": "c588c80b92a968b7",
"name": "",
"showStatusActivities": false,
"showErrors": true,
"showWarnings": true,
"logIOActivities": false,
"server": "691f551bdceac91b",
"useIOFile": false,
"ioFile": "",
"useIOForPayload": false,
"emptyMsgOnFail": false,
"keepMsgProperties": false,
"delayOnStart": false,
"startDelayTime": "",
"x": 890,
"y": 200,
"wires": [
[
"212bfa1611758bfe"
],
[]
]
},
{
"id": "fdba5ea78651f043",
"type": "ui_slider",
"z": "c588c80b92a968b7",
"name": "speed",
"label": "Speed",
"tooltip": "",
"group": "977e52f003fb5a09",
"order": 0,
"width": 0,
"height": 0,
"passthru": true,
"outs": "end",
"topic": "speed",
"topicType": "str",
"min": 0,
"max": "100",
"step": "5",
"className": "",
"x": 250,
"y": 180,
"wires": [
[
"858f2e6f5988132b",
"6d21e4e8c27902d7"
]
]
},
{
"id": "858f2e6f5988132b",
"type": "ui_gauge",
"z": "c588c80b92a968b7",
"name": "sg1",
"group": "977e52f003fb5a09",
"order": 2,
"width": 0,
"height": 0,
"gtype": "gage",
"title": "Speed",
"label": "%",
"format": "{{value}}",
"min": 0,
"max": "100",
"colors": [
"#00b500",
"#e6e600",
"#ca3838"
],
"seg1": "",
"seg2": "",
"diff": false,
"className": "",
"x": 670,
"y": 180,
"wires": []
},
{
"id": "23f4d2f43777506d",
"type": "ui_button",
"z": "c588c80b92a968b7",
"name": "start",
"group": "977e52f003fb5a09",
"order": 3,
"width": 0,
"height": 0,
"passthru": false,
"label": "Start",
"tooltip": "",
"color": "",
"bgcolor": "",
"className": "",
"icon": "",
"payload": "1",
"payloadType": "num",
"topic": "run",
"topicType": "str",
"x": 250,
"y": 240,
"wires": [
[
"6d21e4e8c27902d7"
]
]
},
{
"id": "5e334651d0883c1d",
"type": "ui_button",
"z": "c588c80b92a968b7",
"name": "stop",
"group": "977e52f003fb5a09",
"order": 3,
"width": 0,
"height": 0,
"passthru": false,
"label": "Stop",
"tooltip": "",
"color": "",
"bgcolor": "",
"className": "",
"icon": "",
"payload": "6",
"payloadType": "num",
"topic": "run",
"topicType": "str",
"x": 250,
"y": 280,
"wires": [
[
"6d21e4e8c27902d7"
]
]
},
{
"id": "212bfa1611758bfe",
"type": "debug",
"z": "c588c80b92a968b7",
"name": "debug 24",
"active": true,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "false",
"statusVal": "",
"statusType": "auto",
"x": 1160,
"y": 220,
"wires": []
},
{
"id": "3096ddcb15b3fbea",
"type": "modbus-flex-write",
"z": "c588c80b92a968b7",
"name": "write",
"showStatusActivities": true,
"showErrors": true,
"showWarnings": true,
"server": "691f551bdceac91b",
"emptyMsgOnFail": false,
"keepMsgProperties": false,
"delayOnStart": false,
"startDelayTime": "",
"x": 930,
"y": 240,
"wires": [
[
"212bfa1611758bfe"
],
[]
]
},
{
"id": "6d21e4e8c27902d7",
"type": "function",
"z": "c588c80b92a968b7",
"name": "speed-1",
"func": "if (msg.topic === \"speed\") {\n var speed = msg.payload * 100;\n msg.payload = {\n \"fc\": 6, // Function code for writing a single holding register\n \"unitid\": 1, // Node address\n \"address\": 4096, // Frequency setting address (1000H in decimal)\n \"value\": speed,\n \"quantity\": 1 // Frequency value to set (100% corresponds to 10000)\n };\n} else if (msg.topic === \"run\") {\n var command = msg.payload;\n msg.payload = {\n \"fc\": 6, // Function code for writing a single holding register\n \"unitid\": 1, // Node address\n \"address\": 8192, // Start command address (2000H in decimal)\n \"value\": command,\n \"quantity\": 1 // Start/stop command value (0001 for start, 0006 for stop)\n };\n}\n\nreturn msg;\n",
"outputs": 1,
"timeout": 0,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 480,
"y": 240,
"wires": [
[
"3096ddcb15b3fbea"
]
]
},
{
"id": "cd93c2f776221428",
"type": "inject",
"z": "c588c80b92a968b7",
"name": "test",
"props": [
{
"p": "payload"
},
{
"p": "topic",
"vt": "str"
}
],
"repeat": "",
"crontab": "",
"once": false,
"onceDelay": 0.1,
"topic": "test",
"payload": "{\"fc\":3,\"unitid\":1,\"address\":4096,\"quantity\":10}",
"payloadType": "json",
"x": 930,
"y": 100,
"wires": [
[
"0ffd7e16e625f993"
]
]
},
{
"id": "691f551bdceac91b",
"type": "modbus-client",
"name": "test",
"clienttype": "serial",
"bufferCommands": true,
"stateLogEnabled": false,
"queueLogEnabled": false,
"failureLogEnabled": false,
"tcpHost": "127.0.0.1",
"tcpPort": "502",
"tcpType": "DEFAULT",
"serialPort": "/dev/ttyUSB0",
"serialType": "RTU-BUFFERD",
"serialBaudrate": "9600",
"serialDatabits": "8",
"serialStopbits": "1",
"serialParity": "none",
"serialConnectionDelay": "100",
"serialAsciiResponseStartDelimiter": "0x3A",
"unit_id": "1",
"commandDelay": "1",
"clientTimeout": "1000",
"reconnectOnTimeout": true,
"reconnectTimeout": "2000",
"parallelUnitIdsAllowed": true,
"showErrors": true,
"showWarnings": true,
"showLogs": true
},
{
"id": "977e52f003fb5a09",
"type": "ui_group",
"name": "Smågris 1 øst",
"tab": "c8057a05c64f69f5",
"order": 1,
"disp": true,
"width": "6",
"collapse": false,
"className": ""
},
{
"id": "c8057a05c64f69f5",
"type": "ui_tab",
"name": "Ventilasjon",
"icon": "dashboard",
"order": 1,
"disabled": false,
"hidden": false
}
]```
