@hangtime/grip-connect-capacitor
Version:
Capacitor plugin for Grip Connect devices
98 lines • 4.35 kB
JavaScript
import { BleClient } from "@capacitor-community/bluetooth-le";
import { Directory, Filesystem } from "@capacitor/filesystem";
import { WHC06 as WHC06Base } from "@hangtime/grip-connect";
/**
* Represents a Weiheng - WH-C06 (or MAT Muscle Meter) device.
* To use this device enable: `chrome://flags/#enable-experimental-web-platform-features`.
* {@link https://googlechrome.github.io/samples/web-bluetooth/scan.html| Web Bluetooth}
* {@link https://weihengmanufacturer.com}
*/
export class WHC06 extends WHC06Base {
device;
weightOffset = 10;
connect = async (onSuccess = () => console.log("Connected successfully"), onError = (error) => console.error(error)) => {
try {
await BleClient.initialize();
const filterOptions = Object.assign({}, ...this.filters);
await BleClient.requestLEScan({
...filterOptions,
allowDuplicates: true,
}, (result) => {
if (result && (result.device.name === "IF_B7" || result.localName === "IF_B7")) {
// Update timestamp
this.updateTimestamp();
// Device has no services / characteristics, so we directly call onSuccess
onSuccess();
const manufacturerData = result.manufacturerData;
if (!manufacturerData)
return;
// Check if manufacturerData is set
const dataArray = Object.values(manufacturerData);
if (!dataArray.length)
return;
const data = dataArray[0];
if (!data)
return;
// Handle received data
this.currentSamplesPerPacket = 1;
this.recordPacketReceived();
const weight = (data.getUint8(this.weightOffset) << 8) | data.getUint8(this.weightOffset + 1);
const receivedTime = Date.now();
const receivedData = weight / 100;
const numericData = receivedData - this.applyTare(receivedData) * -1;
const currentMassTotal = Math.max(-1000, numericData);
// Update session stats before building packet
this.peak = Math.max(this.peak, numericData);
this.min = Math.min(this.min, Math.max(-1000, numericData));
this.sum += currentMassTotal;
this.dataPointCount++;
this.mean = this.sum / this.dataPointCount;
// Add data to downloadable Array
this.downloadPackets.push(this.buildDownloadPacket(currentMassTotal, [numericData], {
timestamp: receivedTime,
sampleIndex: this.dataPointCount,
}));
// Check if device is being used
this.activityCheck(numericData);
// Notify with weight data
this.notifyCallback(this.buildForceMeasurement(currentMassTotal));
}
});
}
catch (error) {
onError(error);
}
};
download = async (format = "csv") => {
let content = "";
if (format === "csv") {
content = this.downloadToCSV();
}
else if (format === "json") {
content = this.downloadToJSON();
}
else if (format === "xml") {
content = this.downloadToXML();
}
const now = new Date();
// YYYY-MM-DD
const date = now.toISOString().split("T")[0];
// HH-MM-SS
const time = now.toTimeString().split(" ")[0].replace(/:/g, "-");
const fileName = `data-export-${date}-${time}.${format}`;
try {
await Filesystem.writeFile({
path: fileName,
data: btoa(content),
directory: Directory.Documents,
recursive: true,
});
console.log(`File saved as ${fileName} in Documents directory`);
}
catch (error) {
console.error("Error saving file:", error);
throw error;
}
};
}
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