Example: 09-WiFi/mjpeg_streamer_ap.py

# 本作品采用MIT许可证授权。
# 版权所有 (c) 2013-2023 OpenMV LLC。保留所有权利。
# https://github.com/openmv/openmv/blob/master/LICENSE
#
# MJPEG流媒体 AP.
#
# 此示例展示了如何在接入点模式下进行MJPEG流媒体传输。
# Chrome、Firefox和Android上的MJpegViewer应用已通过测试。
# 连接到OPENMV_AP并使用此URL：http://192.168.1.1:8080查看流媒体。

import sensor
import time
import network
import socket

SSID = "OPENMV_AP"  # 网络 SSID
KEY = "1234567890"  # 网络密钥（必须为 10 个字符）
HOST = ""  # 使用第一个可用的接口
PORT = 8080  # 任意非特权端口

# 重置传感器
sensor.reset()
sensor.set_framesize(sensor.QQVGA)
sensor.set_pixformat(sensor.GRAYSCALE)

# 以AP模式初始化wlan模块。
wlan = network.WLAN(network.AP_IF)
wlan.config(ssid=SSID, key=KEY, channel=2)
wlan.active(True)

print("AP mode started. SSID: {} IP: {}".format(SSID, wlan.ifconfig()[0]))

# 您可以阻塞等待客户端连接
# print(wlan.wait_for_sta(100000))


def start_streaming(client):
    # 从客户端读取请求
    data = client.recv(1024)
    # 应在此处解析客户端请求

    # 发送多部分头部
    client.send(
        "HTTP/1.1 200 OK\r\n"
        "Server: OpenMV\r\n"
        "Content-Type: multipart/x-mixed-replace;boundary=openmv\r\n"
        "Cache-Control: no-cache\r\n"
        "Pragma: no-cache\r\n\r\n"
    )

    # FPS时钟
    clock = time.clock()

    # 开始流式传输图像
    # 注意：禁用IDE预览以提高流媒体FPS。
    while True:
        clock.tick()  # Track elapsed milliseconds between snapshots().
        frame = sensor.snapshot()
        cframe = frame.to_jpeg(quality=35, copy=True)
        header = (
            "\r\n--openmv\r\n"
            "Content-Type: image/jpeg\r\n"
            "Content-Length:" + str(cframe.size()) + "\r\n\r\n"
        )
        client.sendall(header)
        client.sendall(cframe)
        print(clock.fps())


server = None

while True:
    if server is None:
        # 创建服务器套接字
        server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, True)
        # Bind and listen
        server.bind([HOST, PORT])
        server.listen(5)
        # 将服务器套接字设置为阻塞模式
        server.setblocking(True)

    try:
        print("Waiting for connections..")
        client, addr = server.accept()
    except OSError as e:
        server.close()
        server = None
        print("server socket error:", e)
        continue

    try:
        # 将客户端套接字超时设置为2秒
        client.settimeout(5.0)
        print("Connected to " + addr[0] + ":" + str(addr[1]))
        start_streaming(client)
    except OSError as e:
        client.close()
        print("client socket error:", e)
        # sys.print_exception(e)