Pracuję nad projektem automatyki domowej. Podstawowym celem mojego projektu jest sterowanie przekaźnikami i innymi czujnikami umieszczonymi w różnych lokalizacjach. Skonfigurowałem Raspberry Pi jako brokera MQTT. Mosquitto działa dobrze. Na razie próbuję uruchomić przekaźnik podłączony do esp8266 (GPIO2). Oto mój kod serwera WWW Python:
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)
Oto mój kod HTML:
<!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>
Oto mój kod ESP8266:
#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");
}
Wyniki: wszystko wydaje się działać dobrze, ale przekaźnik nie jest wyzwalany po naciśnięciu przycisku na serwerze internetowym. Uważam, że ESP nie jest poprawnie subskrybowany. Kiedy uruchamiam skrypt Pythona na terminalu, za pierwsze kliknięcie otrzymuję HTTP / 1.1 "404 na terminalu, a co drugie kliknięcie otrzymuję HTTP / 1.1" 200
My Pi obecnie pracuje nad dynamicznym IP. Ale upewniłem się, że ESP8266 jest skonfigurowany z bieżącym adresem IP Pi.