65 lines
2.0 KiB
Java
65 lines
2.0 KiB
Java
package com.eveningoutpost.dexdrip.G5Model;
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import com.eveningoutpost.dexdrip.Models.JoH;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import lombok.NoArgsConstructor;
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/**
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* Created by jamorham on 25/11/2016.
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*
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* Alternate mechanism for reading data using the transmitter's internal algorithm.
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*
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* initial packet structure cribbed from Loopkit
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*/
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@NoArgsConstructor
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public class GlucoseRxMessage extends BaseGlucoseRxMessage {
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private final static String TAG = G5CollectionService.TAG; // meh
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public static final byte opcode = 0x31;
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public GlucoseRxMessage(byte[] packet) {
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UserError.Log.d(TAG, "GlucoseRX dbg: " + JoH.bytesToHex(packet));
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if (packet.length >= 14) {
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data = ByteBuffer.wrap(packet).order(ByteOrder.LITTLE_ENDIAN);
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if ((data.get() == opcode) && checkCRC(packet)) {
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data = ByteBuffer.wrap(packet).order(ByteOrder.LITTLE_ENDIAN);
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status_raw = data.get(1);
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status = TransmitterStatus.getBatteryLevel(data.get(1));
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sequence = data.getInt(2);
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timestamp = data.getInt(6);
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int glucoseBytes = data.getShort(10); // check signed vs unsigned!!
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glucoseIsDisplayOnly = (glucoseBytes & 0xf000) > 0;
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glucose = glucoseBytes & 0xfff;
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state = data.get(12);
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trend = data.get(13);
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if (glucose > 13) {
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unfiltered = glucose * 1000;
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filtered = glucose * 1000;
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} else {
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filtered = glucose;
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unfiltered = glucose;
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}
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UserError.Log.d(TAG, "GlucoseRX: seq:" + sequence + " ts:" + timestamp + " sg:" + glucose + " do:" + glucoseIsDisplayOnly + " ss:" + status + " sr:" + status_raw + " st:" + CalibrationState.parse(state) + " tr:" + getTrend());
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}
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} else {
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UserError.Log.d(TAG, "GlucoseRxMessage packet length received wrong: " + packet.length);
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}
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}
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}
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