From 56a5d0d45e55692f65414e17317b2b2f890f1d62 Mon Sep 17 00:00:00 2001
From: Yudi Xiao <463708580@qq.com>
Date: Wed, 10 Dec 2025 16:43:22 +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=202?=
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---
 ble/package.json                | 31 ++++++++++++++++++-------------
 ble/protocol/ProtocolManager.ts | 12 +++++++++---
 2 files changed, 27 insertions(+), 16 deletions(-)

diff --git a/ble/package.json b/ble/package.json
index b5d01ec..052bffc 100644
--- a/ble/package.json
+++ b/ble/package.json
@@ -5,36 +5,41 @@
   "main": "index.ts",
   "types": "index.ts",
   "scripts": {
-    "build": "tsc"
+    "build": "tsc",
+    "clean": "rimraf lib"
   },
   "keywords": [
     "react-native",
     "ble",
     "bluetooth",
     "protocol",
-    "loomart"
+    "loomart",
+    "expo"
   ],
   "author": "Bowong",
   "license": "MIT",
   "peerDependencies": {
-    "react": ">=18.0.0",
-    "react-native": ">=0.70.0"
+    "react": "*",
+    "react-native": "*",
+    "react-native-ble-plx": "*",
+    "expo-file-system": "*",
+    "expo-image-picker": "*",
+    "expo-image-manipulator": "*"
   },
   "dependencies": {
-    "react-native-ble-plx": "^3.5.0",
     "buffer": "^5.7.0"
   },
   "devDependencies": {
-    "@types/react": "^19.0.0",
-    "@types/react-native": "^0.73.0",
-    "typescript": "^5.9.0"
+    "@types/react": "^18.0.0",
+    "@types/react-native": "^0.70.0",
+    "typescript": "^5.0.0"
   },
   "files": [
+    "core",
+    "hooks",
+    "protocol",
+    "services",
     "index.ts",
-    "manager/",
-    "utils/",
-    "hooks/",
-    "types/",
-    "README.md"
+    "package.json"
   ]
 }
diff --git a/ble/protocol/ProtocolManager.ts b/ble/protocol/ProtocolManager.ts
index 0a7cfae..3874a37 100644
--- a/ble/protocol/ProtocolManager.ts
+++ b/ble/protocol/ProtocolManager.ts
@@ -5,13 +5,19 @@ export class ProtocolManager {
 
     static calculateChecksum(frameData: Uint8Array): number {
         let sum = 0;
+        console.debug(`[ProtocolManager] Calculating checksum for frame count: ${frameData.length}`);
         // Checksum is calculated on all bytes except the last one (which is the checksum itself)
-        // But here we are calculating FOR the last byte.
+        // Example: 0xA0 03 00 01 01 5B
+        // 0xA0 + 0x03 + 0x00 + 0x01 + 0x01 = 0xA5
+        // 0 - 0xA5 = 0x5B
         for (let i = 0; i < frameData.length; i++) {
             sum += frameData[i];
         }
-        console.debug(`[ProtocolManager] Checksum calculated:  0 - ${sum} = ${(0 - sum) & 0xff}`);
-        return (0 - sum) & 0xff;
+        const checksumV1 = (0 - sum) & 0xff
+        const checksum = (~sum + 1) & 0xff
+        console.debug(`[ProtocolManager] Checksum V1 calculated:  0 - ${sum} = ${checksumV1}`);
+        console.debug(`[ProtocolManager] Checksum calculated:  0 - ${sum} = ${checksum}`);
+        return checksum;
     }
 
     static verifyChecksum(frameData: Uint8Array, expectedChecksum: number): boolean {