两个Raspberry Pi 4之间的BLE通信

是指通过蓝牙低功耗（BLE）协议在两个树莓派4之间进行通信。BLE是一种设计用于低功耗设备之间的无线通信技术，适用于物联网和远程控制等应用场景。

BLE通信的优势包括低功耗、低成本、短距离通信和广泛的应用支持。通过BLE通信，两个Raspberry Pi 4可以相互传输数据、控制和监测设备，实现智能家居、传感器网络等应用。

在实现两个Raspberry Pi 4之间的BLE通信时，可以使用Python等编程语言的蓝牙库来实现。以下是一个简单的示例代码，用于在两个Raspberry Pi 4之间建立BLE通信：

# Raspberry Pi 1
import bluetooth

server_socket = bluetooth.BluetoothSocket(bluetooth.RFCOMM)
server_socket.bind(("", bluetooth.PORT_ANY))
server_socket.listen(1)

port = server_socket.getsockname()[1]

uuid = "00001101-0000-1000-8000-00805F9B34FB"  # UUID for SPP service

bluetooth.advertise_service(server_socket, "Raspberry Pi 1", service_id=uuid,
                            service_classes=[uuid, bluetooth.SERIAL_PORT_CLASS],
                            profiles=[bluetooth.SERIAL_PORT_PROFILE])

print("Waiting for connection on RFCOMM channel %d" % port)

client_socket, client_info = server_socket.accept()
print("Accepted connection from", client_info)

# Receive data from the client
data = client_socket.recv(1024)
print("Received:", data)

# Send data back to the client
client_socket.send("Hello from Raspberry Pi 1!")

client_socket.close()
server_socket.close()

# Raspberry Pi 2
import bluetooth

server_address = "XX:XX:XX:XX:XX:XX"  # Replace with the Bluetooth address of Raspberry Pi 1
port = 1  # Port number on Raspberry Pi 1

client_socket = bluetooth.BluetoothSocket(bluetooth.RFCOMM)
client_socket.connect((server_address, port))

# Send data to Raspberry Pi 1
client_socket.send("Hello from Raspberry Pi 2!")

# Receive data from Raspberry Pi 1
data = client_socket.recv(1024)
print("Received:", data)

client_socket.close()

这是一个简单的例子，其中Raspberry Pi 1作为服务器端等待连接，Raspberry Pi 2作为客户端连接到Raspberry Pi 1，并进行数据的发送和接收。

在腾讯云的产品中，可以使用云函数SCF（Serverless Cloud Function）或者物联网开发平台IoT Hub来与Raspberry Pi 4进行集成。具体的产品介绍和文档链接如下：