I use Wemos D1 mini +Relay 5V as a gate opener.
My problem is in case of blackout the Wemos reboots itself and the relays open and close twice after the power came back.
It seems to be the Wemos checks all I/O ports.
Do you have any idea how I can handle the blackouts, because in this case my garage door will open.
The flowing code works fine:
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#define CONTACT1 4
#define RELAY1 2
#define RELAY2 0
int prevState1;
char ssid[] = "test"; //SSID of your Wi-Fi router
char pass[] = "test1"; //Password of your Wi-Fi router
IPAddress server(192, 168, 1, 136);
const char *inTopic = "domoticz/out";
const char *outTopic = "domoticz/in";
const char *onmsg1 = "{\"idx\" : 3,\"nvalue\" : 1 }";
const char *offmsg1 = "{\"idx\" : 3,\"nvalue\" : 0 }";
const char *onmsg2 = "{\"idx\" : 4,\"nvalue\" : 1 }";
const char *offmsg2 = "{\"idx\" : 4,\"nvalue\" : 0 }";
void callback(char* topic, byte* payload, unsigned int length) {
Serial.print("Message arrived [");
Serial.print(topic);
Serial.print("] ");
for (int i=0;i<length;i++) {
Serial.print((char)payload[i]);
}
Serial.println();
if((char)payload[0] == '3') {
digitalWrite(RELAY1, LOW);
delay(500);
digitalWrite(RELAY1, HIGH);
}
if((char)payload[0] == '4') {
digitalWrite(RELAY2, LOW);
delay(500);
digitalWrite(RELAY2, HIGH);
}
}
WiFiClient espClient;
PubSubClient client(espClient);
void reconnect() {
// Loop until we're reconnected
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
// Attempt to connect
if (client.connect("espClient")) {
Serial.println("connected");
// Once connected, publish an announcement...
client.publish(outTopic,"Az espClient-nek sikerült csatlakozni az MQTT szerverhez");
// ... and resubscribe
client.subscribe(inTopic);
} 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(CONTACT1, INPUT);
pinMode(RELAY1, OUTPUT);
pinMode(RELAY2, OUTPUT);
digitalWrite(CONTACT1, HIGH);
digitalWrite(RELAY1, HIGH);
digitalWrite(RELAY2, HIGH);
Serial.begin(115200);
delay(10);
// Connect to Wi-Fi network
Serial.println();
Serial.println();
Serial.print("Connecting to...");
Serial.println(ssid);
WiFi.begin(ssid, pass);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("Wi-Fi connected successfully");
client.setServer(server, 1883);
client.setCallback(callback);
}
void loop() {
int curState1 = digitalRead(CONTACT1);
Serial.println(curState1);
if (!client.connected()) {
reconnect();
}
if (curState1 != prevState1){
prevState1=curState1;
if (prevState1 == LOW){
client.publish(outTopic, offmsg1);
client.publish(outTopic, offmsg2);
}
if (prevState1 == HIGH){
client.publish(outTopic, onmsg1);
client.publish(outTopic, onmsg2);
}
}
client.loop();
}