使用Unity开发在PC端连接并接收蓝牙数据

在开发前，以为蓝牙这块已经很成熟了，基本信手拈来。

蛋是！搜索一圈下来，发现unity支持蓝牙开发的寥寥无几，找下来就发现一个BLE的插件和一个arduino的插件。然而...我要做的是通过PC的蓝牙模块来连接并取得蓝牙传感器数据，开始方了...

由于我是一个unity钉子户，.Net的winform不会写，网上找到的窗体应用也无法复用，又没有开发过蓝牙，项目又催得紧，只能抓紧时间各种找资料。

功夫不负有心人，在stack上找到一个国外大牛的发言，他自己做了一套unity可以调用BLE的库，果断请教。

后来去大佬的github down下来，（末尾已贴链接）本地打开测试后已经可以连接，但是会遇到身份验证无法通过的一个问题，问过硬件厂商说没有加身份验证。

然后偶然发现是我在电脑的蓝牙上需要先连接匹配上传感器，然后在项目内在扫描蓝牙设备，找到自己需要的service name和特征码，点击订阅，就可以接收到传感器的数据了，贴下我自己修改的部分代码，基本没啥大改。

using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;public class Demo : MonoBehaviour
{public GameManager manager;public bool isScanningDevices = false;public bool isScanningServices = false;public bool isScanningCharacteristics = false;public bool isSubscribed = false;public Text deviceScanButtonText;public Text deviceScanStatusText;public GameObject deviceScanResultProto;public Button serviceScanButton;public Text serviceScanStatusText;public Dropdown serviceDropdown;public Button characteristicScanButton;public Text characteristicScanStatusText;public Dropdown characteristicDropdown;public Button subscribeButton;public Text subcribeText;public Button writeButton;public InputField writeInput;public Text errorText;Transform scanResultRoot;public string selectedDeviceId;public string selectedServiceId;Dictionary<string, string> characteristicNames = new Dictionary<string, string>();public string selectedCharacteristicId;Dictionary<string, Dictionary<string, string>> devices = new Dictionary<string, Dictionary<string, string>>();string lastError;// Start is called before the first frame updatevoid Start(){scanResultRoot = deviceScanResultProto.transform.parent;deviceScanResultProto.transform.SetParent(null);}GameObject g = null;// Update is called once per framevoid Update(){BleApi.ScanStatus status;if (isScanningDevices){BleApi.DeviceUpdate res = new BleApi.DeviceUpdate();do{status = BleApi.PollDevice(ref res, false);if (status == BleApi.ScanStatus.AVAILABLE){if (!devices.ContainsKey(res.id)){devices[res.id] = new Dictionary<string, string>() {{ "name", "" },{ "isConnectable", "False" }};}if (res.nameUpdated)devices[res.id]["name"] = res.name;if (res.isConnectableUpdated)devices[res.id]["isConnectable"] = res.isConnectable.ToString();// consider only devices which have a name and which are connectableif (devices[res.id]["name"] != "" && devices[res.id]["isConnectable"] == "True"){// add new device to listGameObject g = Instantiate(deviceScanResultProto, scanResultRoot);g.name = res.id;g.transform.GetChild(0).GetComponent<Text>().text = devices[res.id]["name"];g.transform.GetChild(1).GetComponent<Text>().text = res.id;}}else if (status == BleApi.ScanStatus.FINISHED){isScanningDevices = false;deviceScanButtonText.text = "扫描设备";deviceScanStatusText.text = "finished";}} while (status == BleApi.ScanStatus.AVAILABLE);//isScanningDevices = false;}if (isScanningServices){BleApi.Service res = new BleApi.Service();do{status = BleApi.PollService(out res, false);if (status == BleApi.ScanStatus.AVAILABLE){serviceDropdown.AddOptions(new List<string> { res.uuid });// first option gets selectedif (serviceDropdown.options.Count == 1)SelectService(serviceDropdown.gameObject);}else if (status == BleApi.ScanStatus.FINISHED){isScanningServices = false;serviceScanButton.interactable = true;serviceScanStatusText.text = "finished";}} while (status == BleApi.ScanStatus.AVAILABLE);}if (isScanningCharacteristics){BleApi.Characteristic res = new BleApi.Characteristic();do{status = BleApi.PollCharacteristic(out res, false);if (status == BleApi.ScanStatus.AVAILABLE){string name = res.userDescription != "no description available" ? res.userDescription : res.uuid;characteristicNames[name] = res.uuid;characteristicDropdown.AddOptions(new List<string> { name });// first option gets selectedif (characteristicDropdown.options.Count == 1)SelectCharacteristic(characteristicDropdown.gameObject);}else if (status == BleApi.ScanStatus.FINISHED){isScanningCharacteristics = false;characteristicScanButton.interactable = true;characteristicScanStatusText.text = "finished";}} while (status == BleApi.ScanStatus.AVAILABLE);}if (isSubscribed){ BleApi.BLEData res = new BleApi.BLEData();while (BleApi.PollData(out res, false)){subcribeText.text = BitConverter.ToString(res.buf, 0, res.size);subcribeText.text= Hex2Ten(subcribeText.text);string[] TenArray = subcribeText.text.Split(' ');//manager.currentturnCount = manager.totalturnCount -lastCount ;manager.totalturnCount = int.Parse(TenArray[18]);}}{// log potential errorsBleApi.ErrorMessage res = new BleApi.ErrorMessage();BleApi.GetError(out res);if (lastError != res.msg){Debug.LogError(res.msg);errorText.text = res.msg;lastError = res.msg;}}//lastCount = manager.totalturnCount;//Debug.Log("lastCount" + lastCount);//Debug.Log("currentturnCount" + manager.currentturnCount);}int lastCount = 0;public static string Hex2Ten(string hex){string[] array = hex.Split('-');string str = "";for (int k = 0; k < array.Length; k++){int ten= Convert.ToInt32(array[k], 16);str += ten.ToString() + " ";}return str.ToString();}private void OnApplicationQuit(){BleApi.Quit();}public void StartStopDeviceScan(){if (!isScanningDevices){// start new scanfor (int i = scanResultRoot.childCount - 1; i >= 0; i--)Destroy(scanResultRoot.GetChild(i).gameObject);BleApi.StartDeviceScan();isScanningDevices = true;deviceScanButtonText.text = "停止扫描";deviceScanStatusText.text = "scanning";}else{// stop scanisScanningDevices = false;BleApi.StopDeviceScan();deviceScanButtonText.text = "扫描设备";deviceScanStatusText.text = "stopped";}}public void SelectDevice(GameObject data){for (int i = 0; i < scanResultRoot.transform.childCount; i++){var child = scanResultRoot.transform.GetChild(i).gameObject;child.transform.GetChild(0).GetComponent<Text>().color = child == data ? Color.red :deviceScanResultProto.transform.GetChild(0).GetComponent<Text>().color;}selectedDeviceId = data.name;serviceScanButton.interactable = true;}public void StartServiceScan(){if (!isScanningServices){// start new scanserviceDropdown.ClearOptions();BleApi.ScanServices(selectedDeviceId);isScanningServices = true;serviceScanStatusText.text = "scanning";serviceScanButton.interactable = false;}}public void SelectService(GameObject data){selectedServiceId = serviceDropdown.options[serviceDropdown.value].text;characteristicScanButton.interactable = true;}public void StartCharacteristicScan(){if (!isScanningCharacteristics){// start new scancharacteristicDropdown.ClearOptions();BleApi.ScanCharacteristics(selectedDeviceId, selectedServiceId);isScanningCharacteristics = true;characteristicScanStatusText.text = "scanning";characteristicScanButton.interactable = false;}}public void SelectCharacteristic(GameObject data){string name = characteristicDropdown.options[characteristicDropdown.value].text;selectedCharacteristicId = characteristicNames[name];subscribeButton.interactable = true;writeButton.interactable = true;}public void Subscribe(){// no error code available in non-blocking modeBleApi.SubscribeCharacteristic(selectedDeviceId, selectedServiceId, selectedCharacteristicId, false);isSubscribed = true;}public void Write(){byte[] payload = Encoding.ASCII.GetBytes(writeInput.text);BleApi.BLEData data = new BleApi.BLEData();data.buf = new byte[512];data.size = (short)payload.Length;data.deviceId = selectedDeviceId;data.serviceUuid = selectedServiceId;data.characteristicUuid = selectedCharacteristicId;for (int i = 0; i < payload.Length; i++)data.buf[i] = payload[i];// no error code available in non-blocking modeBleApi.SendData(in data, false);}
}

中间做了一个取值和进制转换，就可以渠道自己想要的数据了。

https://github.com/adabru/BleWinrtDll

再次感谢大佬，希望有用到的朋友可以给他点个star。

ok，分享就到这了。

下载不了的私信我。

下载地址：BleWinrtDll-main.zip-互联网文档类资源-CSDN下载

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