I am working on a project to run some (relays or LED’s) on an inputs (Pins) Arduino by esp8266-01s . now while searching on internet I found a video divided it two step that talks about the issue using a ESP8266-01. The important thing in the topic is that the person uses two codes for project :
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The first code for esp8266.
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The second code for arduino uno.
The most important part of the topic I want to modify the code for esp8266 . but the owner of the video uses node red website and I want to use the cayenne website . I want to specify basic commands to modify in order to work on cayenne website .
I play with esp and arduino in order to project offline.
first video
second video
code for esp
#include <PubSubClient.h>
#include <ESP8266WiFi.h>
//EDIT THESE LINES TO MATCH YOUR SETUP
#define MQTT_SERVER "192.168.1.117" ///YourMQTTBroker'sIP
const char* ssid = "Weems_2GHz";
const char* password = "1029384756";
char* Topic = "inTopic"; //subscribe to topic to be notified about
WiFiClient wifiClient;
void setup() {
//initialize the light as an output and set to LOW (off)
//start the serial line for debugging
Serial.begin(9600);
delay(100);
//start wifi subsystem
WiFi.begin(ssid, password);
//attempt to connect to the WIFI network and then connect to the MQTT server
reconnect();
//wait a bit before starting the main loop
delay(2000);
}
PubSubClient client(MQTT_SERVER, 1883, callback, wifiClient);
void loop(){
//reconnect if connection is lost
if (!client.connected() && WiFi.status() == 3) {reconnect();}
//maintain MQTT connection
client.loop();
//MUST delay to allow ESP8266 WIFI functions to run
delay(20);
}
void callback(char* topic, byte* payload, unsigned int length) {
//convert topic to string to make it easier to work with
String topicStr = topic;
//Print out some debugging info
////Serial.println("Callback update.");
//Serial.print("Topic: ");
//Serial.println(topicStr);
//turn the light off if the payload is '0' and publish to the MQTT server a confirmation message
if (payload[0] == '0'){
Serial.print("0");
respond();}
if(payload[0] == '1'){
Serial.print("1");
respond();}
if (payload[0] == '2'){
Serial.print("2");
respond();}
if(payload[0] == '3'){
Serial.print("3");
respond();}
if (payload[0] == '4'){
Serial.print("4");
respond();}
if(payload[0] == '5'){
Serial.print("5");
respond();}
if (payload[0] == '6'){
Serial.print("6");
respond();}
if(payload[0] == '7'){
Serial.print("7");
respond();
}
}
void respond(){
delay(5);
if (Serial.available()) {
//read serial as a character
char ser = Serial.read();
switch (ser) {
case 'a':
client.publish("outTopic", "Relay 1 is ON");
break;
case 'b':
client.publish("outTopic", "Relay 1 is OFF");
break;
case 'c':
client.publish("outTopic", "Relay 2 is ON");
break;
case 'd':
client.publish("outTopic", "Relay 2 is OFF");
break;
case 'e':
client.publish("outTopic", "Relay 3 is ON");
break;
case 'f':
client.publish("outTopic", "Relay 3 is OFF");
break;
case 'g':
client.publish("outTopic", "Relay 4 is ON");
break;
case 'h':
client.publish("outTopic", "Relay 4 is OFF");
break;
}//switch
}//if
}//void
void reconnect() {
//attempt to connect to the wifi if connection is lost
if(WiFi.status() != WL_CONNECTED){
while (WiFi.status() != WL_CONNECTED) {
delay(500);
}
}
//make sure we are connected to WIFI before attemping to reconnect to MQTT
if(WiFi.status() == WL_CONNECTED){
// Loop until we're reconnected to the MQTT server
while (!client.connected()) {
//Serial.print("Attempting MQTT connection...");
// Generate client name based on MAC address and last 8 bits of microsecond counter
String clientName;
clientName += "esp8266-";
uint8_t mac[6];
WiFi.macAddress(mac);
clientName += macToStr(mac);
//if connected, subscribe to the topic(s) we want to be notified about
if (client.connect((char*) clientName.c_str())) {
Serial.print("\tMTQQ Connected");
client.subscribe(Topic);
}
//otherwise print failed for debugging
else{Serial.println("\tFailed."); abort();}
}
}
}
//generate unique name from MAC addr
String macToStr(const uint8_t* mac){
String result;
for (int i = 0; i < 6; ++i) {
result += String(mac[i], 16);
if (i < 5){
result += ':';
}
}
return result;
}
code for arduino uno
void setup(){
Serial.begin(9600);
//Set all the pins we need to output pins
pinMode(12, OUTPUT);
pinMode(11, OUTPUT);
pinMode(10, OUTPUT);
pinMode(9, OUTPUT);
digitalWrite(12, HIGH);
digitalWrite(11, HIGH);
digitalWrite(10, HIGH);
digitalWrite(9, HIGH);
}
void loop (){
if (Serial.available()) {
//read serial as a character
char ser = Serial.read();
//NOTE because the serial is read as "char" and not "int", the read value must be compared to character numbers
//hence the quotes around the numbers in the case statement
switch (ser) {
case '0':
digitalWrite(12, LOW);
Serial.print("a");
break;
case '1':
digitalWrite(12, HIGH);
Serial.print("b");
break;
case '2':
digitalWrite(11, LOW);
Serial.print("c");
break;
case '3':
digitalWrite(11, HIGH);
Serial.print("d");
break;
case '4':
digitalWrite(10, LOW);
Serial.print("e");
break;
case '5':
digitalWrite(10, HIGH);
Serial.print("f");
break;
case '6':
digitalWrite(9, LOW);
Serial.print("g");
break;
case '7':
digitalWrite(9, HIGH);
Serial.print("h");
break;
}
}
}