通过蓝牙上传固件在iOS中不起作用

我们曾经 DFU-Library 以便更早地将固件上传到我们的BLE配件。 但我们的新配件不支持DFU库,我们需要将固件上传到OTA服务中,并根据其各自的特性,我们使用以下代码进行同样的操作,

func prepareChunksToTransfer(fromData: Data) -> [Data] {
    var offset = 0
    var bytesToSend = fromData.count
    let packetSize = BoardInformationService.packetSize
    var chunkArray: [Data] = []
    
    repeat {
        let chunkLength = min(bytesToSend, packetSize)
        let chunk = fromData.subdata(in: Int(offset) ..< Int(offset + chunkLength))
        chunkArray.append(chunk)
        
        offset += chunkLength
        bytesToSend -= chunkLength
    } while bytesToSend > 0
    
    print("BT: Total Chunk size:\(chunkArray.count)")
    return chunkArray
}

func uploadNextChunk() {
    if let firmwareCharacteristic = fileCharacteristic {
        print("Found fileCharacteristic to upload")
        if self.currentPacket < self.totalNumberOfPackets {
            
            // Send next chunk
            let nextPacket = self.fileByteChunkArray[self.currentPacket]
            print("BT: current packet uploading: \(self.currentPacket)/\(self.totalNumberOfPackets) Data:\(nextPacket)")
            self.currentPacket += 1
            
            // Write to peripheral
            BTDiscovery.sharedInstance().peripheralBLE.writeValue(nextPacket, for: firmwareCharacteristic, type: .withResponse)
        } else {
            updateCompleteCompletion!()
        }
    } else {
        print("No fileCharacteristic to upload")
    }
}

// This is a delegate method which gets called when we get response from our peripheral after sending each packet.
func ackReceivedFromPeripheral() {
    uploadNextChunk()
}

但这在iOS上不起作用,但在Android上使用相同的方法。你能告诉我这里可能出了什么问题吗。

预期行为:数据传输完成后,ble设备应启动固件更新,即使传输了完整的数据,iOS上也不会进行固件更新。

仅供参考:外围设备有 esp32