Hi again!
So my project of controlling the lights by using a relay as a 4-way switch and sensing the current (up to 5A) to know the state is coming along quite nicely!
I've got my first working prototype soldered on a board.
I want to share my progress and receive some feedback as this is my first attempt on something like this.
This is my schematic:
This is how the final project should look like:
This is what it looks like now: (relay is different, can't source the actual one yet)
This is the code: (for the relay I'm currently using)
#include <ESP8266WiFi.h>
#include <MQTTClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <ESP8266HTTPUpdateServer.h>
//Device Name - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
char* DevName = "Arduino_Switch_test";
// Wi-Fi - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
const char* ssid = "@@@";
const char* password = "@@@";
//MQTT - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
String subscribeTopic = String("openhab/out/") + DevName + "/command";
String outTopic = String("openhab/in/") + DevName + "/state";
const char* server = "@@@";
const char* mqttDeviceID = DevName;
const char* mqttDeviceUsername = "@@@";
const char* mqttDevicePassword = "@@@";
// Pins and other Variables - - - - - - - - - - - - - - - - - - - - - - - - - -
const byte inputPin = 14;
const byte outputPin = 5; //LED_BUILTIN;
byte state;
byte LastState;
bool first_run = true;
// Web Updater Settings - - - - - - - - - - - - - - - - - - - - - - - - - - - -
const char* host = DevName;
const char* update_path = "/firmware";
const char* update_username = "@@@";
const char* update_password = "@@@";
ESP8266WebServer httpServer(80);
ESP8266HTTPUpdateServer httpUpdater;
// Something - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
WiFiClient net;
MQTTClient client;
//Connect to WiFI and MQTT - - - - - - - - - - - - - - - - - - - - - - - - - -
void connect();
//Setup - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
void setup() {
Serial.begin(74880);
pinMode(inputPin, INPUT);
pinMode(outputPin, OUTPUT);
digitalWrite(outputPin, LOW);
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, LOW);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
client.begin(server, net);
client.onMessage(messageReceived);
connect();
//something about the webserver
MDNS.begin(host);
httpUpdater.setup(&httpServer, update_path, update_username, update_password);
httpServer.begin();
MDNS.addService("http", "tcp", 80);
}
//Connect to WiFI and MQTT - - - - - - - - - - - - - - - - - - - - - - - - - -
void connect()
{
while (WiFi.status() != WL_CONNECTED)
{
delay(1000);
}
while (!client.connect(mqttDeviceID,mqttDeviceUsername,mqttDevicePassword))
{
delay(1000);
}
client.subscribe(subscribeTopic);
}
//Loop - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
int i=0;
void loop() {
// MQTT Loop
client.loop();
// Make sure device is connected
if(!client.connected())
{
connect();
}
PubState();
httpServer.handleClient();
delay(10);
}
//Publish new state to MQTT - - - - - - - - - - - - - - - - - - - - - - - - -
void PubState(){
String msg;
state = digitalRead(inputPin);
if (state == 0){
msg="ON";
}
else{
msg="OFF";
}
if (first_run == true){
client.publish(outTopic,String(msg));
LastState = state;
first_run = false;
}
if(state != LastState){
client.publish(outTopic,String(msg));
LastState = state;
}
}
// Change the state of a relay - - - - - - - - - - - - - - - - - - - - - - - -
void messageReceived(String &topic, String &payload) {
if (digitalRead(outputPin) == LOW){
digitalWrite(outputPin, HIGH);
}
else{
digitalWrite(outputPin, LOW);
}
delay(20);
}
I'm still troubleshooting some minor issues but I sure would like to hear if I made any mistakes so far.
