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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",
"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"
]
}

12
ble/protocol/ProtocolManager.ts
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@ -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 {