expo-ble模块测试demo 联调BLE模块

ble/protocol/ProtocolManager.ts

@@ -1,4 +1,3 @@
-import {Buffer} from 'buffer';
 import {ProtocolFrame} from './types';
 import {FRAME_CONSTANTS} from './Constants';
 
@@ -11,7 +10,8 @@ export class ProtocolManager {
         for (let i = 0; i < frameData.length; i++) {
             sum += frameData[i];
         }
-        return sum & 0xff;
+        console.debug(`[ProtocolManager] Checksum calculated:  0 - ${sum} = ${(0 - sum) & 0xff}`);
+        return (0 - sum) & 0xff;
     }
 
     static verifyChecksum(frameData: Uint8Array, expectedChecksum: number): boolean {