要实现Flask与ESP8266之间的SocketIO通信,你可以按照以下步骤进行:
-
安装所需库:
- Flask:用于创建Web服务器。
- Flask-SocketIO:用于在Flask应用中实现SocketIO通信。
- Adafruit-IO:用于在ESP8266上实现SocketIO通信。
-
在Flask应用中设置SocketIO:
from flask import Flask, render_template
from flask_socketio import SocketIO, emit
app = Flask(__name__)
app.config['SECRET_KEY'] = 'secret!'
socketio = SocketIO(app)
@app.route('/')
def index():
return render_template('index.html')
@socketio.on('connect', namespace='/test')
def test_connect():
emit('message', {'data': 'Connected'})
@socketio.on('disconnect', namespace='/test')
def test_disconnect():
print('Client disconnected')
@socketio.on('message', namespace='/test')
def handle_message(message):
print('received message: ' + message['data'])
emit('message', {'data': 'Message received'})
if __name__ == '__main__':
socketio.run(app)
-
创建一个名为index.html
的模板文件,用于在浏览器中显示SocketIO连接状态和接收/发送消息:
<!DOCTYPE html>
<html>
<head>
<title>SocketIO Communication</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/1.7.3/socket.io.js"></script>
<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<script type="text/javascript">
var socket = io.connect('http://localhost:5000/test');
socket.on('connect', function() {
$('#status').text('Connected');
});
socket.on('disconnect', function() {
$('#status').text('Disconnected');
});
socket.on('message', function(data) {
$('#message').text(data['data']);
});
function sendMessage() {
var message = $('#inputMessage').val();
socket.emit('message', {'data': message});
$('#inputMessage').val('');
}
</script>
</head>
<body>
<h1>SocketIO Communication</h1>
<p>Status: <span id="status"></span></p>
<p>Received message: <span id="message"></span></p>
<input type="text" id="inputMessage">
<button onclick="sendMessage()">Send Message</button>
</body>
</html>
-
在ESP8266上的Arduino IDE中创建一个新的项目,导入Adafruit-IO库并使用以下代码实现SocketIO通信:
#include <ESP8266WiFi.h>
#include <AdafruitIO_Client.h>
#define WIFI_SSID "your_wifi_ssid"
#define WIFI_PASSWORD "your_wifi_password"
#define IO_USERNAME "your_adafruit_io_username"
#define IO_KEY "your_adafruit_io_key"
AdafruitIO_Client io(IO_USERNAME, IO_KEY, "io.adafruit.com");
void setup() {
Serial.begin(115200);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("Connected to WiFi");
io.connect();
while (!io.connected()) {
delay(1000);
Serial.println("Connecting to Adafruit IO...");
}
Serial.println("Connected to Adafruit IO");
io.feed("message").onMessage([](AdafruitIO_Data *data) {
Serial.print("Received message: ");
Serial.println(data->value());
io.feed("message").save("Message received");
});
}
void loop() {
io.run();
}
这样,你就可以在Flask应用中发送消息并在ESP8266上接收到,并在ESP8266上发送消息并在Flask应用中接收到。