Bir ev otomasyonu projesi üzerinde çalışıyorum. Projemin temel amacı, farklı konumlarda bulunan röleleri ve diğer sensörleri kontrol etmektir. Raspberry Pi'mi bir MQTT brokeri olarak kurdum. Mosquitto iyi gidiyor. Şimdilik yapmaya çalıştığım şey esp8266 (GPIO2) ile bağlanmış bir röleyi tetiklemek. İşte benim Python web sunucusu kodum:
import paho.mqtt.client as mqtt
from flask import Flask, render_template, request
app = Flask(__name__)
mqttc=mqtt.Client()
mqttc.connect("localhost",1883,60)
mqttc.loop_start()
# Create a dictionary called pins to store the pin number, name, and pin state:
pins = {
2 : {'name' : 'GPIO 2', 'board' : 'esp8266', 'topic' : 'esp8266/2', 'state' : 'False'}
}
# Put the pin dictionary into the template data dictionary:
templateData = {
'pins' : pins
}
@app.route("/")
def main():
# Pass the template data into the template main.html and return it to the user
return render_template('main.html', **templateData)
# The function below is executed when someone requests a URL with the pin number and action in it:
@app.route("/<board>/<changePin>/<action>")
def action(board, changePin, action):
# Convert the pin from the URL into an integer:
changePin = int(changePin)
# Get the device name for the pin being changed:
devicePin = pins[changePin]['name']
# If the action part of the URL is "on," execute the code indented below:
if action == "1" and board == 'esp8266':
mqttc.publish(pins[changePin]['topic'],"1")
pins[changePin]['state'] = 'True'
if action == "0" and board == 'esp8266':
mqttc.publish(pins[changePin]['topic'],"0")
pins[changePin]['state'] = 'False'
# Along with the pin dictionary, put the message into the template data dictionary:
templateData = {
'pins' : pins
}
return render_template('main.html', **templateData)
if __name__ == "__main__":
app.run(host='0.0.0.0', port=8181, debug=True)
İşte benim HTML kodum:
<!DOCTYPE html>
<head>
<title>RPi Web Server</title>
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css" integrity="sha384-fLW2N01lMqjakBkx3l/M9EahuwpSfeNvV63J5ezn3uZzapT0u7EYsXMjQV+0En5r" crossorigin="anonymous">
<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<h1>RPi Web Server - ESP8266 MQTT</h1>
{% for pin in pins %}
<h2>{{ pins[pin].name }}
{% if pins[pin].state == 'True' %}
is currently <strong>on</strong></h2><div class="row"><div class="col-md-2">
<a href="/esp8266/{{pin}}/0" class="btn btn-block btn-lg btn-default" role="button">Turn off</a></div></div>
{% else %}
is currently <strong>off</strong></h2><div class="row"><div class="col-md-2">
<a href="/esp8266/{{pin}}/1" class="btn btn-block btn-lg btn-primary" role="button">Turn on</a></div></div>
{% endif %}
{% endfor %}
</body>
</html>
İşte ESP8266 kodum:
#include <ESP8266WiFi.h>
#include <PubSubClient.h
const char* ssid = "Godfather";
const char* password = "idontknow";
const char* mqtt_server = "192.168.137.100";
WiFiClient espClient;
PubSubClient client(espClient);
const int ledGPIO2 = 2;
void setup_wifi() {
delay(10);
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.print("WiFi connected - ESP IP address: ");
Serial.println(WiFi.localIP());
}
void callback(String topic, byte* message, unsigned int length) {
Serial.print("Message arrived on topic: ");
Serial.print(topic);
Serial.print(". Message: ");
String messageTemp;
for (int i = 0; i < length; i++) {
Serial.print((char)message[i]);
messageTemp += (char)message[i];
}
Serial.println();
if(topic=="esp8266/2"){
Serial.print("Changing GPIO 2 to ");
if(messageTemp == "1"){
digitalWrite(ledGPIO2, HIGH);
Serial.print("On");
}
else if(messageTemp == "0"){
digitalWrite(ledGPIO4, LOW);
Serial.print("Off");
}
}
Serial.println();
}
void reconnect() {
// Loop until we're reconnected
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
if (client.connect("ESP8266Client")) {
Serial.println("connected");
client.subscribe("esp8266/2");
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
// Wait 5 seconds before retrying
delay(5000);
}
}
}
void setup() {
pinMode(ledGPIO2, OUTPUT);
Serial.begin(115200);
setup_wifi();
client.setServer(mqtt_server, 1883);
client.setCallback(callback);
}
void loop() {
if (!client.connected()) {
reconnect();
}
if(!client.loop())
client.connect("ESP8266Client");
}
Sonuçlar: Her şey iyi çalışıyor gibi görünüyor, ancak web sunucusunda düğmeye bastığımda hala röle tetiklenmiyor. ESP'nin doğru şekilde abone olmadığına inanıyorum. Terminalde Python komut dosyasını çalıştırdığımda, ilk tıklama için terminalde HTTP / 1.1 "404 alıyorum ve diğer her tıklamayla HTTP / 1.1" 200 alıyorum
Pi'm şu anda dinamik IP üzerinde çalışıyor. Ancak ESP8266'nın geçerli Pi IP adresiyle yapılandırıldığından emin oldum.