added master gain control flow

flows/master_gain_control_flow.json

@@ -0,0 +1,173 @@
+[
+    {
+        "id": "tabXilicaDash",
+        "type": "tab",
+        "label": "Xilica FR1 Dashboard"
+    },
+    {
+        "id": "ui_slider_gain",
+        "type": "ui_slider",
+        "z": "tabXilicaDash",
+        "name": "MASTER_GAIN (dB)",
+        "label": "MASTER_GAIN (dB)",
+        "tooltip": "",
+        "group": "ui_group_1",
+        "order": 1,
+        "width": 6,
+        "height": 1,
+        "passthru": false,
+        "outs": "all",
+        "topic": "",
+        "topicType": "str",
+        "min": "-100",
+        "max": "-18",
+        "step": "0.5",
+        "className": "",
+        "x": 210,
+        "y": 160,
+        "wires": [
+            [
+                "fn_build_set_from_slider"
+            ]
+        ]
+    },
+    {
+        "id": "ui_text_curr",
+        "type": "ui_text",
+        "z": "tabXilicaDash",
+        "group": "ui_group_1",
+        "order": 2,
+        "width": 6,
+        "height": 1,
+        "name": "Current (dB)",
+        "label": "Current (dB)",
+        "format": "{{msg.payload}}",
+        "layout": "row-spread",
+        "x": 650,
+        "y": 100,
+        "wires": []
+    },
+    {
+        "id": "fn_build_set_from_slider",
+        "type": "function",
+        "z": "tabXilicaDash",
+        "name": "build SET MASTER_GAIN <v>",
+        "func": "const v = Number(msg.payload);\n// show value on the slider label while sending\nnode.status({text: v.toFixed(1)+\" dB\"});\nmsg.payload = `SET MASTER_GAIN ${v}`;\nreturn msg;",
+        "outputs": 1,
+        "noerr": 0,
+        "x": 450,
+        "y": 160,
+        "wires": [
+            [
+                "fn_append_cr"
+            ]
+        ]
+    },
+    {
+        "id": "inj_poll",
+        "type": "inject",
+        "z": "tabXilicaDash",
+        "name": "poll GET (every 2s)",
+        "props": [
+            {
+                "p": "payload",
+                "v": "GET MASTER_GAIN",
+                "vt": "str"
+            }
+        ],
+        "repeat": "2",
+        "once": true,
+        "onceDelay": "0.5",
+        "x": 170,
+        "y": 100,
+        "wires": [
+            [
+                "fn_append_cr"
+            ]
+        ]
+    },
+    {
+        "id": "fn_append_cr",
+        "type": "function",
+        "z": "tabXilicaDash",
+        "name": "append \\r",
+        "func": "if (typeof msg.payload !== 'string') msg.payload = String(msg.payload);\nmsg.payload += \"\\r\";\nreturn msg;",
+        "outputs": 1,
+        "x": 470,
+        "y": 100,
+        "wires": [
+            [
+                "tcp_req"
+            ]
+        ]
+    },
+    {
+        "id": "tcp_req",
+        "type": "tcp request",
+        "z": "tabXilicaDash",
+        "name": "FR1 192.168.1.244:10007",
+        "server": "192.168.1.244",
+        "port": "10007",
+        "out": "time",
+        "ret": "string",
+        "splitc": "\\r",
+        "x": 670,
+        "y": 160,
+        "wires": [
+            [
+                "fn_parse_get",
+                "dbg"
+            ]
+        ]
+    },
+    {
+        "id": "fn_parse_get",
+        "type": "function",
+        "z": "tabXilicaDash",
+        "name": "parse GET reply → number",
+        "func": "// Expected: MASTER_GAIN=-6.0\\r or OK\\r after SET\nconst s = (msg.payload||\"\").trim();\nif (/^MASTER_GAIN\\s*=/.test(s)) {\n  const m = s.match(/=\\s*([-+]?\\d+(?:\\.\\d+)?)/);\n  if (m) {\n    const val = Number(m[1]);\n    // update text and slider\n    node.send([{payload: val.toFixed(1)}, {payload: val}]);\n  }\n}\nreturn null; // outputs handled via node.send",
+        "outputs": 2,
+        "x": 910,
+        "y": 160,
+        "wires": [
+            [
+                "ui_text_curr"
+            ],
+            [
+                "ui_slider_gain"
+            ]
+        ]
+    },
+    {
+        "id": "dbg",
+        "type": "debug",
+        "z": "tabXilicaDash",
+        "name": "Raw replies",
+        "active": true,
+        "tosidebar": true,
+        "complete": "payload",
+        "statusVal": "",
+        "statusType": "auto",
+        "x": 870,
+        "y": 100,
+        "wires": []
+    },
+    {
+        "id": "ui_group_1",
+        "type": "ui_group",
+        "name": "Master Gain",
+        "tab": "ui_tab_1",
+        "order": 1,
+        "disp": true,
+        "width": "6",
+        "collapse": false
+    },
+    {
+        "id": "ui_tab_1",
+        "type": "ui_tab",
+        "name": "Solaro FR1",
+        "icon": "fa-volume-up",
+        "disabled": false,
+        "hidden": false
+    }
+]