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flutter weigh serial
flutter_weigh_serial #
flutter package
提供获取电子秤数据能力,支持 Android、Windows 平台。
注意:改库只支持串口方式连接(包括usb转串口)的称重设备。
使用方式 #
添加依赖
dependencies:
flutter_weigh_serial: ^1.0.0+1
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api 调用方式
import 'package:flutter_weigh_serial/flutter_weigh_serial.dart';
class _MyAppState extends State<MyApp> {
late WeighSerialProvider weighSerialProvider;
@override
void initState() {
super.initState();
weighSerialProvider = WeighSerialProvider();
}
@override
void dispose() {
weighSerialProvider.close(); //退出页面时断开连接
super.dispose();
}
...
// 连接称重设备的方法如下:
void _connectWeigh() {
weighSerialProvider.findAndConnect().then(
(success) {
if (success) {
//搜索到称重设备并连接成功
weighSerialProvider.weighListener?.listen(
(data) {
// 获取到称重数据,返回数据模型 *WeighResult*
log('称重数据 - ${data.toMap().toString()}');
},
);
} else {
Fluttertoast.showToast(msg: '称重设备连接失败');
}
},
onError: (e) {
Fluttertoast.showToast(msg: '称重设备连接失败(${e.toString()})');
},
);
}
}
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称重返回的模型数据 WeighResult 结构如下:
class WeighResult {
/// 重量 单位是kg
final double weight;
/// 结果是否稳定 稳定:true 不稳定: false
final bool isStable;
}
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扩展 #
本库支持 vId、pId 如下组合的称重设备:
// vId - pId
static Map<int, List<int>> weighDeviceList = {
1027: [
24577,
24592,
24593,
24596,
24597,
],
4292: [
60000,
60016,
60017,
],
1659: [
8963,
9123,
9139,
9155,
9171,
9187,
9203,
],
6790: [
21795,
29987,
21972,
],
9025: [],
5824: [1155],
1003: [8260],
7855: [4],
3368: [516],
1155: [22336],
11914: [
5,
10,
],
};
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可通过如下方式自行扩展支持的组合:
//示例,扩展 vId 为 1111, pId 为 1234,1235 的称重设备
WeighSerialConfig.weighDeviceList[1111] = [1234,1235];
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具体使用可参考 example 示例
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