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expo-ble-app-demo
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expo-ble模块测试demo 联调BLE模块 take 2

This commit is contained in:
Yudi Xiao 2025-12-10 16:43:22 +08:00
parent d2dcd39411
commit 56a5d0d45e
2 changed files with 27 additions and 16 deletions
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31
ble/package.json
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@ -5,36 +5,41 @@
"main": "index.ts", "main": "index.ts",
"types": "index.ts", "types": "index.ts",
"scripts": { "scripts": {
"build": "tsc" "build": "tsc",
"clean": "rimraf lib"
}, },
"keywords": [ "keywords": [
"react-native", "react-native",
"ble", "ble",
"bluetooth", "bluetooth",
"protocol", "protocol",
"loomart" "loomart",
"expo"
], ],
"author": "Bowong", "author": "Bowong",
"license": "MIT", "license": "MIT",
"peerDependencies": { "peerDependencies": {
"react": ">=18.0.0", "react": "*",
"react-native": ">=0.70.0" "react-native": "*",
"react-native-ble-plx": "*",
"expo-file-system": "*",
"expo-image-picker": "*",
"expo-image-manipulator": "*"
}, },
"dependencies": { "dependencies": {
"react-native-ble-plx": "^3.5.0",
"buffer": "^5.7.0" "buffer": "^5.7.0"
}, },
"devDependencies": { "devDependencies": {
"@types/react": "^19.0.0", "@types/react": "^18.0.0",
"@types/react-native": "^0.73.0", "@types/react-native": "^0.70.0",
"typescript": "^5.9.0" "typescript": "^5.0.0"
}, },
"files": [ "files": [
"core",
"hooks",
"protocol",
"services",
"index.ts", "index.ts",
"manager/", "package.json"
"utils/",
"hooks/",
"types/",
"README.md"
] ]
} }

12
ble/protocol/ProtocolManager.ts
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@ -5,13 +5,19 @@ export class ProtocolManager {
static calculateChecksum(frameData: Uint8Array): number { static calculateChecksum(frameData: Uint8Array): number {
let sum = 0; 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) // 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++) { for (let i = 0; i < frameData.length; i++) {
sum += frameData[i]; sum += frameData[i];
} }
console.debug(`[ProtocolManager] Checksum calculated: 0 - ${sum} = ${(0 - sum) & 0xff}`); const checksumV1 = (0 - sum) & 0xff
return (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 { static verifyChecksum(frameData: Uint8Array, expectedChecksum: number): boolean {