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https://github.com/zjs81/meshcore-open.git
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62 lines
1.5 KiB
Dart
62 lines
1.5 KiB
Dart
import 'package:flutter/material.dart';
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List<double> getSNRfromSF(int spreadingFactor) {
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switch (spreadingFactor) {
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case 7:
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return [4.0, -2.0, -4.0, -6.0];
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case 8:
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return [4.0, -4.0, -6.0, -8.0];
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case 9:
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return [4.0, -6.0, -8.0, -10.0];
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case 10:
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return [4.0, -8.0, -10.0, -13.0];
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case 11:
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return [4.0, -10.0, -12.5, -15.0];
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case 12:
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return [4.0, -12.5, -15.0, -18.0];
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default:
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return []; // Or throw Exception('Invalid SF: $spreadingFactor');
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}
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}
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class SNRIcon extends StatelessWidget {
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final double snr;
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final List<double> snrLevels;
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const SNRIcon({
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super.key,
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required this.snr,
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this.snrLevels = const [4.0, -2.0, -4.0, -6.0],
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});
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@override
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Widget build(BuildContext context) {
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IconData icon;
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Color color;
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if (snr >= snrLevels[0]) {
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icon = Icons.signal_cellular_alt;
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color = Colors.green;
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} else if (snr >= snrLevels[1]) {
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icon = Icons.signal_cellular_alt;
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color = Colors.lightGreen;
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} else if (snr >= snrLevels[2]) {
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icon = Icons.signal_cellular_alt;
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color = Colors.yellow;
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} else if (snr >= snrLevels[3]) {
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icon = Icons.signal_cellular_alt_2_bar;
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color = Colors.orange;
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} else {
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icon = Icons.signal_cellular_alt_1_bar;
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color = Colors.red;
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}
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return Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(icon, color: color),
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Text('$snr dB', style: TextStyle(fontSize: 10, color: color)),
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],
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);
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}
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}
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