Nightscout Pixel
Nightscout Pixel is a simple monitor for current Nighscout CGM data – direction, sensor glucose value, delta.
| System | Node-RED |
|---|---|
| Firmware | AWTRIX 3 |
| Topic | Miscellaneous |
| Built by | fabkai |
| File | wyMWodvk5nxX.json · 9.3 KB |
| Icons | 8 |
| Published | 20 Apr 2024 |
| Downloads | 36 |
A JSON with the current Nightscout data is queried at a defined interval via the Nightscout V1 REST API (the implementation requires an access token created in the Subjects - People, Devices, etc. section of the Nightscout Admin Tools). The data from the JSON file is then processed in a function to display direction, sensor glucose value and delta. It can also be displayed if no more current data is available for a defined period of time. The icons and values are displayed via a custom app using MQTT (MQTT Broker is required).
wyMWodvk5nxX.json
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"id": "7057b52ef757d606",
"type": "tab",
"label": "Awtrix-Nightscout-Pixel",
"disabled": false,
"info": "",
"env": []
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{
"id": "e7101a5caeb46470",
"type": "inject",
"z": "7057b52ef757d606",
"name": "Start",
"props": [
{
"p": "payload"
},
{
"p": "topic",
"vt": "str"
}
],
"repeat": "5",
"crontab": "",
"once": false,
"onceDelay": 0.1,
"topic": "",
"payload": "",
"payloadType": "date",
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{
"id": "25b695a46aa59b69",
"type": "change",
"z": "7057b52ef757d606",
"name": "Command: Data query",
"rules": [
{
"t": "set",
"p": "payload",
"pt": "msg",
"to": "curl -H \"Content-Type: application/json\" -H \"Authorization: Bearer TOKEN\" -X GET https://NIGHTSCOUT_URL:PORT/api/v1/entries.json?count=1",
"tot": "str"
}
],
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"property": "",
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{
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"type": "exec",
"z": "7057b52ef757d606",
"command": "",
"addpay": "payload",
"append": "",
"useSpawn": "false",
"timer": "",
"winHide": false,
"oldrc": false,
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{
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"type": "function",
"z": "7057b52ef757d606",
"name": "Function: Create Pixel",
"func": "var glucose = msg.payload[0].sgv; // Data from Nightscout JSON\nvar delta = Math.round(msg.payload[0].delta);\nvar direction = msg.payload[0].direction;\nvar measuringtime = msg.payload[0].date;\nvar now = new Date();\nvar timestamp = now.getTime();\nvar nodataoffset = 660000; // Offset in milliseconds to the last measurement\nvar icon = \"\";\nvar color = \"\";\n\nif (delta >= 0) {\n delta = '+' + delta; // Insert plus sign for positive delta\n}\n\nif ((measuringtime + nodataoffset) < timestamp) {\n icon = 39552; // Set NoData icon if no data is available after the selected offset time\n} else { // Set icon depending on direction\n if (direction == \"SingleUp\") {\n icon = 39545;\n } else if (direction == \"SingleDown\") {\n icon = 39546;\n } else if (direction == \"Flat\") {\n icon = 39547;\n } else if (direction == \"FortyFiveDown\") {\n icon = 39548;\n } else if (direction == \"FortyFiveUp\") {\n icon = 39549;\n } else if (direction == \"DoubleUp\") {\n icon = 39550;\n } else if (direction == \"DoubleDown\") {\n icon = 39551;\n } \n}\n\n// Create payload to display on Awtrix depending on glucose level\nif (glucose > 250) {\n\n if ((measuringtime + nodataoffset) < timestamp) {\n color = [255, 255, 255];\n } else {\n color = [247, 133, 31];\n }\n\n msg.payload = {\n \"text\": glucose + ' ' + delta,\n \"icon\": icon,\n \"color\": color,\n \"pushIcon\": 0,\n \"save\": true,\n \"textCase\": 2\n };\n return [{ payload: msg.payload }, null];\n} else if (glucose < 70) {\n\n if ((measuringtime + nodataoffset) < timestamp) {\n color = [255, 255, 255];\n } else {\n color = [255, 0, 0];\n }\n\n msg.payload = {\n \"text\": glucose + ' ' + delta,\n \"icon\": icon,\n \"color\": color,\n \"pushIcon\": 0,\n \"save\": true,\n \"textCase\": 2\n };\n return [{ payload: msg.payload }, null];\n} else if (glucose => 70 && glucose <= 250) {\n\n if ((measuringtime + nodataoffset) < timestamp) {\n color = [255, 255, 255];\n } else {\n color = [0, 255, 0];\n }\n \n msg.payload = {\n \"text\": glucose + ' ' + delta,\n \"icon\": icon,\n \"color\": color,\n \"pushIcon\": 0,\n \"save\": true,\n \"textCase\": 2\n };\n return [{ payload: msg.payload }, null];\n}\n\nreturn msg;",
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"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
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{
"id": "317d17a92e168a53",
"type": "debug",
"z": "7057b52ef757d606",
"name": "Debug: Nightscout JSON",
"active": false,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "payload",
"targetType": "msg",
"statusVal": "",
"statusType": "auto",
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"wires": []
},
{
"id": "1ac6b90937457bf7",
"type": "change",
"z": "7057b52ef757d606",
"name": "Command: Token request",
"rules": [
{
"t": "set",
"p": "payload",
"pt": "msg",
"to": "curl -X GET https://NIGHTSCOUT_URL:PORT/api/v2/authorization/request/ACCESS_TOKEN -H \"Content-Type: application/json\"",
"tot": "str"
}
],
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"addpay": "payload",
"append": "",
"useSpawn": "false",
"timer": "",
"winHide": false,
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"name": "cURL",
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{
"id": "a3561344ac2dae6d",
"type": "json",
"z": "7057b52ef757d606",
"name": "parsing",
"property": "payload",
"action": "",
"pretty": false,
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"wires": [
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{
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"type": "change",
"z": "7057b52ef757d606",
"name": "save token",
"rules": [
{
"t": "set",
"p": "Nightscout.Token",
"pt": "flow",
"to": "payload.token",
"tot": "msg"
}
],
"action": "",
"property": "",
"from": "",
"to": "",
"reg": false,
"x": 730,
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"wires": [
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{
"id": "1e1f42891a8b5b97",
"type": "change",
"z": "7057b52ef757d606",
"name": "insert token",
"rules": [
{
"t": "change",
"p": "payload",
"pt": "msg",
"from": "TOKEN",
"fromt": "str",
"to": "Nightscout.Token",
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{
"id": "d3ef3ba51867a7aa",
"type": "mqtt out",
"z": "7057b52ef757d606",
"name": "Nightscout Custom App",
"topic": "PREFIX/custom/Nightscout",
"qos": "1",
"retain": "false",
"respTopic": "",
"contentType": "",
"userProps": "",
"correl": "",
"expiry": "",
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{
"id": "326ea0d44da2b88f",
"type": "mqtt-broker",
"name": "",
"broker": "",
"port": "1883",
"clientid": "",
"autoConnect": true,
"usetls": false,
"protocolVersion": "4",
"keepalive": "60",
"cleansession": true,
"birthTopic": "",
"birthQos": "0",
"birthPayload": "",
"birthMsg": {},
"closeTopic": "",
"closeQos": "0",
"closePayload": "",
"closeMsg": {},
"willTopic": "",
"willQos": "0",
"willPayload": "",
"willMsg": {},
"userProps": "",
"sessionExpiry": ""
}
]
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