From 1689fff721a7d0ffe3f9d21f08da05f3457618eb Mon Sep 17 00:00:00 2001
From: Yudi Xiao <463708580@qq.com>
Date: Thu, 11 Dec 2025 12:23:26 +0800
Subject: [PATCH] =?UTF-8?q?expo-ble=E6=A8=A1=E5=9D=97=E6=B5=8B=E8=AF=95dem?=
 =?UTF-8?q?o=20=E8=81=94=E8=B0=83BLE=E6=A8=A1=E5=9D=97=20take=204=20?=
 =?UTF-8?q?=E6=B7=BB=E5=8A=A0MTU=E8=AE=BE=E7=BD=AE=E5=92=8Clog?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                 | 18 +++++++++++++++++-
 ble/core/BleClient.ts     |  4 +++-
 ble/protocol/Constants.ts |  1 +
 3 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index df7326a..33bd40b 100644
--- a/README.md
+++ b/README.md
@@ -2,10 +2,26 @@
 
 安装 bun https://bun.com/docs/installation#windows
 
-```bash
+```powershell
 powershell -c "irm bun.sh/install.ps1|iex"
 ```
 
+检查bun是否正确安装
+
+```powershell
+& "$env:USERPROFILE\.bun\bin\bun" --version
+```
+
+添加bun到系统路径
+
+```powershell
+[System.Environment]::SetEnvironmentVariable(
+  "Path",
+  [System.Environment]::GetEnvironmentVariable("Path", "User") + ";$env:USERPROFILE\.bun\bin",
+  [System.EnvironmentVariableTarget]::User
+)
+```
+
 安装项目依赖
 
 ```bash
diff --git a/ble/core/BleClient.ts b/ble/core/BleClient.ts
index 1aea076..f72a540 100644
--- a/ble/core/BleClient.ts
+++ b/ble/core/BleClient.ts
@@ -1,6 +1,7 @@
 import {BleManager, Device, Characteristic, BleError as PlxError, ScanOptions} from 'react-native-ble-plx';
 import {Platform, PermissionsAndroid} from 'react-native';
 import {BleDevice, ConnectionState, BleError, ScanResult} from './types';
+import {BLE_UUIDS} from "@/ble";
 
 export class BleClient {
     private static instance: BleClient;
@@ -90,7 +91,8 @@ export class BleClient {
         if (!this.manager) throw new Error('BLE not supported on web');
         try {
             this.emit('connectionStateChange', {deviceId, state: ConnectionState.CONNECTING});
-            const device = await this.manager.connectToDevice(deviceId);
+            const device = await this.manager.connectToDevice(deviceId, {requestMTU: BLE_UUIDS.REQUEST_MTU});
+            console.log("Connected to device with MTU = ", device.mtu);
             this.connectedDevice = await device.discoverAllServicesAndCharacteristics();
             this.emit('connectionStateChange', {deviceId, state: ConnectionState.CONNECTED});
 
diff --git a/ble/protocol/Constants.ts b/ble/protocol/Constants.ts
index 95b07ca..7a917b7 100644
--- a/ble/protocol/Constants.ts
+++ b/ble/protocol/Constants.ts
@@ -6,6 +6,7 @@ export const BLE_UUIDS = {
     BROADCAST_CHARACTERISTIC: "000002c1-0000-1000-8000-00805f9b34fb",
     WRITE_CHARACTERISTIC: '000002c5-0000-1000-8000-00805f9b34fb',
     READ_CHARACTERISTIC: '000002c6-0000-1000-8000-00805f9b34fb',
+    REQUEST_MTU: 517,
 } as const;
 
 export const FRAME_CONSTANTS = {