diff --git a/flows/main.json b/flows/main.json
index 19c5e14..58a1ebb 100644
--- a/flows/main.json
+++ b/flows/main.json
@@ -6136,7 +6136,7 @@
         "z": "9daf9e2b.019fc",
         "name": "",
         "group": "1be83144.4fe4bf",
-        "order": 10,
+        "order": 15,
         "width": 2,
         "height": 1,
         "passthru": false,
@@ -6148,8 +6148,8 @@
         "payload": "reboot",
         "payloadType": "str",
         "topic": "reboot",
-        "x": 400,
-        "y": 420,
+        "x": 420,
+        "y": 680,
         "wires": [
             [
                 "4af9112d.87767"
@@ -6167,8 +6167,8 @@
         "timer": "2",
         "oldrc": false,
         "name": "cmd",
-        "x": 870,
-        "y": 460,
+        "x": 710,
+        "y": 720,
         "wires": [
             [],
             [],
@@ -6181,7 +6181,7 @@
         "z": "9daf9e2b.019fc",
         "name": "",
         "group": "1be83144.4fe4bf",
-        "order": 8,
+        "order": 17,
         "width": 2,
         "height": 1,
         "passthru": false,
@@ -6193,8 +6193,8 @@
         "payload": "shutdown",
         "payloadType": "str",
         "topic": "shutdown",
-        "x": 390,
-        "y": 500,
+        "x": 410,
+        "y": 760,
         "wires": [
             [
                 "4af9112d.87767"
@@ -6227,8 +6227,8 @@
         "timer": "",
         "oldrc": false,
         "name": "",
-        "x": 1100,
-        "y": 340,
+        "x": 1120,
+        "y": 600,
         "wires": [
             [],
             [
@@ -6252,8 +6252,8 @@
         "randomLast": "5",
         "randomUnits": "seconds",
         "drop": false,
-        "x": 700,
-        "y": 340,
+        "x": 720,
+        "y": 600,
         "wires": [
             [
                 "fa914867.0a0658"
@@ -6266,7 +6266,7 @@
         "z": "9daf9e2b.019fc",
         "name": "Restart Python",
         "group": "1be83144.4fe4bf",
-        "order": 6,
+        "order": 12,
         "width": 4,
         "height": 1,
         "passthru": true,
@@ -6278,8 +6278,9 @@
         "payload": "",
         "payloadType": "str",
         "topic": "",
-        "x": 380,
-        "y": 340,
+        "topicType": "str",
+        "x": 400,
+        "y": 600,
         "wires": [
             [
                 "1575db82.742854",
@@ -6299,8 +6300,8 @@
         "timer": "",
         "oldrc": false,
         "name": "Python soft kill",
-        "x": 720,
-        "y": 400,
+        "x": 740,
+        "y": 660,
         "wires": [
             [],
             [],
@@ -6318,8 +6319,8 @@
         "timer": "",
         "oldrc": false,
         "name": "Raspimjpeg soft kill",
-        "x": 730,
-        "y": 280,
+        "x": 750,
+        "y": 540,
         "wires": [
             [],
             [],
@@ -6340,8 +6341,8 @@
         "fwdInMessages": false,
         "resendOnRefresh": false,
         "templateScope": "local",
-        "x": 1660,
-        "y": 380,
+        "x": 1700,
+        "y": 640,
         "wires": [
             []
         ]
@@ -6356,8 +6357,8 @@
         "noerr": 0,
         "initialize": "",
         "finalize": "",
-        "x": 1480,
-        "y": 300,
+        "x": 1500,
+        "y": 560,
         "wires": [
             [
                 "d12008a0.47be4"
@@ -6382,8 +6383,8 @@
         "payload": "",
         "payloadType": "str",
         "topic": "",
-        "x": 1320,
-        "y": 460,
+        "x": 1340,
+        "y": 720,
         "wires": [
             [
                 "73500be7.9ab7c4"
@@ -6397,8 +6398,8 @@
         "name": "Catch Errors",
         "scope": null,
         "uncaught": false,
-        "x": 1070,
-        "y": 400,
+        "x": 1090,
+        "y": 660,
         "wires": [
             [
                 "f9a871d5.a73828"
@@ -6415,8 +6416,8 @@
         "noerr": 0,
         "initialize": "",
         "finalize": "",
-        "x": 1240,
-        "y": 400,
+        "x": 1260,
+        "y": 660,
         "wires": [
             [
                 "8b511c2b.9c24c8"
@@ -6433,8 +6434,8 @@
         "noerr": 0,
         "initialize": "",
         "finalize": "",
-        "x": 1480,
-        "y": 460,
+        "x": 1500,
+        "y": 720,
         "wires": [
             [
                 "d12008a0.47be4"
@@ -6458,8 +6459,8 @@
         "topic": "",
         "payload": "start",
         "payloadType": "str",
-        "x": 130,
-        "y": 340,
+        "x": 150,
+        "y": 600,
         "wires": [
             [
                 "466eb611.4da048"
@@ -6658,11 +6659,11 @@
         "z": "9daf9e2b.019fc",
         "name": "Update",
         "group": "1be83144.4fe4bf",
-        "order": 3,
+        "order": 9,
         "width": 6,
         "height": 1,
         "passthru": false,
-        "label": "Update",
+        "label": "System Update",
         "tooltip": "",
         "color": "",
         "bgcolor": "",
@@ -6670,8 +6671,9 @@
         "payload": "",
         "payloadType": "str",
         "topic": "update",
-        "x": 400,
-        "y": 220,
+        "topicType": "str",
+        "x": 440,
+        "y": 460,
         "wires": [
             [
                 "2d2ef1fd.40e6e6"
@@ -6689,8 +6691,8 @@
         "timer": "",
         "oldrc": false,
         "name": "Update",
-        "x": 700,
-        "y": 220,
+        "x": 720,
+        "y": 460,
         "wires": [
             [
                 "64f61762.68c788",
@@ -6717,7 +6719,7 @@
         "fwdInMessages": true,
         "resendOnRefresh": true,
         "templateScope": "local",
-        "x": 390,
+        "x": 410,
         "y": 180,
         "wires": [
             []
@@ -6737,8 +6739,8 @@
         "raw": false,
         "topic": "",
         "name": "Update notif",
-        "x": 970,
-        "y": 200,
+        "x": 1030,
+        "y": 440,
         "wires": [
             []
         ]
@@ -8872,5 +8874,387 @@
                 "ce7087fc.dcc9e8"
             ]
         ]
+    },
+    {
+        "id": "b3448fbb.351d28",
+        "type": "rpi-gpio out",
+        "z": "1371dec5.76e671",
+        "name": "Fan",
+        "pin": "33",
+        "set": false,
+        "level": "0",
+        "freq": "25000",
+        "out": "pwm",
+        "x": 1110,
+        "y": 40,
+        "wires": []
+    },
+    {
+        "id": "f6ff420b.0af648",
+        "type": "ui_slider",
+        "z": "bccd1f23.87219",
+        "name": "focus_speed",
+        "label": "Focus Speed",
+        "tooltip": "in µm/sec",
+        "group": "fbd92986.1028c8",
+        "order": 5,
+        "width": 0,
+        "height": 0,
+        "passthru": true,
+        "outs": "end",
+        "topic": "focus_speed",
+        "topicType": "str",
+        "min": "250",
+        "max": "2500",
+        "step": "250",
+        "x": 550,
+        "y": 460,
+        "wires": [
+            [
+                "dc48dc42.98d18"
+            ]
+        ]
+    },
+    {
+        "id": "2d371e59.b0e50a",
+        "type": "inject",
+        "z": "bccd1f23.87219",
+        "name": "Default: 1000µm/s",
+        "props": [
+            {
+                "p": "payload"
+            }
+        ],
+        "repeat": "",
+        "crontab": "",
+        "once": true,
+        "onceDelay": "0.5",
+        "topic": "",
+        "payload": "1000",
+        "payloadType": "num",
+        "x": 130,
+        "y": 460,
+        "wires": [
+            [
+                "f6ff420b.0af648"
+            ]
+        ]
+    },
+    {
+        "id": "167cda35.c9b6ae",
+        "type": "ui_button",
+        "z": "bccd1f23.87219",
+        "name": "",
+        "group": "fbd92986.1028c8",
+        "order": 1,
+        "width": 3,
+        "height": 1,
+        "passthru": false,
+        "label": "UP 100um",
+        "tooltip": "",
+        "color": "",
+        "bgcolor": "",
+        "icon": "fa-angle-up fa-3x",
+        "payload": "{\"action\":\"move\",\"direction\":\"UP\",\"distance\":0.1}",
+        "payloadType": "json",
+        "topic": "actuator/focus",
+        "topicType": "str",
+        "x": 350,
+        "y": 520,
+        "wires": [
+            [
+                "62030521.88317c"
+            ]
+        ]
+    },
+    {
+        "id": "72a7c597.9374fc",
+        "type": "ui_button",
+        "z": "bccd1f23.87219",
+        "name": "",
+        "group": "fbd92986.1028c8",
+        "order": 6,
+        "width": 3,
+        "height": 1,
+        "passthru": false,
+        "label": "DOWN 100um",
+        "tooltip": "",
+        "color": "",
+        "bgcolor": "",
+        "icon": "fa-angle-down fa-3x",
+        "payload": "{\"action\":\"move\",\"direction\":\"DOWN\",\"distance\":0.1}",
+        "payloadType": "json",
+        "topic": "actuator/focus",
+        "topicType": "str",
+        "x": 340,
+        "y": 600,
+        "wires": [
+            [
+                "62030521.88317c"
+            ]
+        ]
+    },
+    {
+        "id": "e73fd87d.d24e4",
+        "type": "function",
+        "z": "b771c342.49603",
+        "name": "get acq_minimum_mesh",
+        "func": "msg.payload = msg.payload.acq_minimum_mesh;\nreturn msg;",
+        "outputs": 1,
+        "noerr": 0,
+        "x": 330,
+        "y": 360,
+        "wires": [
+            [
+                "5517c129.1617e"
+            ]
+        ]
+    },
+    {
+        "id": "489c8e06.cc7d6",
+        "type": "function",
+        "z": "b771c342.49603",
+        "name": "get acq_maximum_mesh",
+        "func": "msg.payload = msg.payload.acq_maximum_mesh;\nreturn msg;",
+        "outputs": 1,
+        "noerr": 0,
+        "x": 330,
+        "y": 400,
+        "wires": [
+            [
+                "9f3edbe2.43c728"
+            ]
+        ]
+    },
+    {
+        "id": "9f3edbe2.43c728",
+        "type": "ui_numeric",
+        "z": "b771c342.49603",
+        "name": "acq_maximum_mesh",
+        "label": "Max fraction size (μm)",
+        "tooltip": "",
+        "group": "3e1ba03d.f01d8",
+        "order": 8,
+        "width": 5,
+        "height": 1,
+        "wrap": false,
+        "passthru": true,
+        "topic": "acq_maximum_mesh",
+        "topicType": "str",
+        "format": "{{value}}",
+        "min": "200",
+        "max": "2000",
+        "step": "100",
+        "x": 640,
+        "y": 400,
+        "wires": [
+            [
+                "9f501f49.45645"
+            ]
+        ]
+    },
+    {
+        "id": "5517c129.1617e",
+        "type": "ui_numeric",
+        "z": "b771c342.49603",
+        "name": "acq_minimum_mesh",
+        "label": "Min fraction size (μm)",
+        "tooltip": "",
+        "group": "3e1ba03d.f01d8",
+        "order": 7,
+        "width": 5,
+        "height": 1,
+        "wrap": false,
+        "passthru": true,
+        "topic": "acq_minimum_mesh",
+        "topicType": "str",
+        "format": "{{value}}",
+        "min": 0,
+        "max": "300",
+        "step": "10",
+        "x": 640,
+        "y": 360,
+        "wires": [
+            [
+                "9f501f49.45645"
+            ]
+        ]
+    },
+    {
+        "id": "83c5a708.a5715",
+        "type": "exec",
+        "z": "9daf9e2b.019fc",
+        "command": "git --git-dir=/home/pi/PlanktonScope/.git describe --long --tags",
+        "addpay": false,
+        "append": "",
+        "useSpawn": "true",
+        "timer": "",
+        "oldrc": false,
+        "name": "Get git revision",
+        "x": 640,
+        "y": 340,
+        "wires": [
+            [
+                "af2b8d95.195bb8"
+            ],
+            [],
+            []
+        ]
+    },
+    {
+        "id": "d334d264.8a7728",
+        "type": "exec",
+        "z": "9daf9e2b.019fc",
+        "command": "git --git-dir=/home/pi/PlanktonScope/.git branch --list",
+        "addpay": false,
+        "append": "",
+        "useSpawn": "false",
+        "timer": "",
+        "oldrc": false,
+        "name": "Get git branch",
+        "x": 640,
+        "y": 260,
+        "wires": [
+            [
+                "e5e8e66c.899588"
+            ],
+            [],
+            []
+        ]
+    },
+    {
+        "id": "e4342b66.72972",
+        "type": "ui_button",
+        "z": "9daf9e2b.019fc",
+        "name": "get git branch",
+        "group": "1be83144.4fe4bf",
+        "order": 4,
+        "width": 4,
+        "height": 1,
+        "passthru": false,
+        "label": "Update branch list",
+        "tooltip": "",
+        "color": "",
+        "bgcolor": "",
+        "icon": "mi-compare_arrows",
+        "payload": "",
+        "payloadType": "str",
+        "topic": "",
+        "topicType": "str",
+        "x": 410,
+        "y": 260,
+        "wires": [
+            [
+                "d334d264.8a7728"
+            ]
+        ]
+    },
+    {
+        "id": "3f13b9f8.bac94e",
+        "type": "ui_dropdown",
+        "z": "9daf9e2b.019fc",
+        "name": "Git branch list",
+        "label": "Switch branch to",
+        "tooltip": "",
+        "place": "branch",
+        "group": "1be83144.4fe4bf",
+        "order": 5,
+        "width": 6,
+        "height": 1,
+        "passthru": false,
+        "multiple": false,
+        "options": [],
+        "payload": "",
+        "topic": "topic",
+        "topicType": "msg",
+        "x": 1020,
+        "y": 260,
+        "wires": [
+            [
+                "d037a624.60bea8"
+            ]
+        ]
+    },
+    {
+        "id": "e5e8e66c.899588",
+        "type": "function",
+        "z": "9daf9e2b.019fc",
+        "name": "filter branch",
+        "func": "msg.options = msg.payload.trimEnd().split('\\n')\nmsg.payload = msg.options.find((str) => str.startsWith('*'));\nreturn msg;",
+        "outputs": 1,
+        "noerr": 0,
+        "initialize": "",
+        "finalize": "",
+        "x": 830,
+        "y": 260,
+        "wires": [
+            [
+                "3f13b9f8.bac94e"
+            ]
+        ]
+    },
+    {
+        "id": "c1fb03f7.e675f8",
+        "type": "inject",
+        "z": "9daf9e2b.019fc",
+        "name": "once",
+        "props": [
+            {
+                "p": "payload"
+            }
+        ],
+        "repeat": "",
+        "crontab": "",
+        "once": true,
+        "onceDelay": "",
+        "topic": "",
+        "payload": "start",
+        "payloadType": "str",
+        "x": 430,
+        "y": 300,
+        "wires": [
+            [
+                "d334d264.8a7728",
+                "83c5a708.a5715"
+            ]
+        ]
+    },
+    {
+        "id": "d037a624.60bea8",
+        "type": "exec",
+        "z": "9daf9e2b.019fc",
+        "command": "git --git-dir=/home/pi/PlanktonScope/.git checkout",
+        "addpay": true,
+        "append": "",
+        "useSpawn": "false",
+        "timer": "",
+        "oldrc": false,
+        "name": "git checkout branch",
+        "x": 1270,
+        "y": 260,
+        "wires": [
+            [],
+            [
+                "d334d264.8a7728",
+                "83c5a708.a5715"
+            ],
+            []
+        ]
+    },
+    {
+        "id": "af2b8d95.195bb8",
+        "type": "ui_text",
+        "z": "9daf9e2b.019fc",
+        "group": "1be83144.4fe4bf",
+        "order": 2,
+        "width": 12,
+        "height": 1,
+        "name": "",
+        "label": "Current code version",
+        "format": "{{msg.payload}}",
+        "layout": "row-center",
+        "x": 1040,
+        "y": 340,
+        "wires": []
     }
 ]
\ No newline at end of file