Let me know if you like me to post the hole code for esp and arduino.
That would be a good idea
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Let me know if you like me to post the hole code for esp and arduino.
//I2c code from: http://www.berryjam.eu/2014/07/advanced-arduino-i2c-communication/
// (c) 2014 Ignas Gramba
#include <ESP8266WiFi.h>
//#include <ESP8266WebServer.h>
#include <Wire.h>
#include <PubSubClient.h>
const char* ssid = "HouseNetwork";
const char* password = "password";
const char* mqtt_server = "192.168.1.39";
//ESP8266WebServer webserver(80);
WiFiClient espClient;
PubSubClient client(espClient);
long lastMsg = 0;
char msg[50];
char valoare[20];
//int value = 0;
#define SlaveDeviceId 9
int value;
int pinValue;
/*void handleRoot() {
String arg0 = String(webserver.arg(0));
String arg1 = String(webserver.arg(1));
if (webserver.arg(0) == "1") {
pinValue = setPin(); // slave toggles led
}
if (webserver.arg(0) == "2") {
value = getValue(); // slave reads analog
}
String val = String(value);
String pin = String(pinValue);
String htmlDoc = "<!DOCTYPE html>";
htmlDoc += "<html>";
htmlDoc += "<head>";
htmlDoc += "<title>TWI . Demo</title>";
htmlDoc += "</head>";
htmlDoc += "<body>";
htmlDoc += "<br>Toggle led <a href='/?led=1'>click</a><br>";
htmlDoc += "<br>Raed analog value <a href='/?led=2'>click</a><br>";
htmlDoc += "<br>";
htmlDoc += "pinStatus=" + pin + " Analog value=" + val;
htmlDoc += "<br>";
htmlDoc += "</body>";
htmlDoc += "</html>";
webserver.send(200, "text/html", htmlDoc);
}
void handleNotFound() {
webserver.send(404, "text/plain", "Page not found ...");
}
*/
void setup() {
Serial.begin(115200);
Wire.begin(0, 2); // join i2c bus sda,scl
setup_wifi();
Serial.println("");
Serial.println("WiFi connected");
delay(100);
client.setServer(mqtt_server, 1883);
client.setCallback(callback);
//webserver.on("/", handleRoot);
//webserver.onNotFound(handleNotFound);
//webserver.begin();
//Serial.println("Web server has started on: ");
Serial.print(WiFi.localIP());
}
void setup_wifi() {
delay(10);
// We start by connecting to a WiFi network
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
}
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();
// Switch on the LED if an 1 was received as first character
if ((char)payload[0] == '1') {
setPin();
//digitalWrite(BUILTIN_LED, LOW); // Turn the LED on (Note that LOW is the voltage level
// but actually the LED is on; this is because
// it is acive low on the ESP-01)
} else {
getValue();
//digitalWrite(BUILTIN_LED, HIGH); // Turn the LED off by making the voltage HIGH
}
}
void reconnect() {
// Loop until we're reconnected
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
// Attempt to connect
if (client.connect("ESP8266Client")) {
Serial.println("connected");
// Once connected, publish an announcement...
client.publish("outTopic", "hello world");
// ... 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 loop() {
if (!client.connected()) {
reconnect();
}
client.loop();
}
//webserver.handleClient();
int setPin() {
Wire.beginTransmission(SlaveDeviceId);
Wire.write(8); // Transfer command ("8") to set pin command
Wire.endTransmission(); // Moved up here by frippe75
delay(100);
// GET RESPONSE
int receivedValue = 0;
String valprimit;
Wire.requestFrom(SlaveDeviceId, 2);
receivedValue = Wire.read() << 8 | Wire.read();// combine two bytes into integer
valprimit = String(receivedValue);
valprimit.toCharArray(valoare, 20);
client.publish("outTopic", valoare);
int error = Wire.endTransmission();
Serial.println(error);
return receivedValue;
}
int getValue() {
Wire.beginTransmission(SlaveDeviceId);
Wire.write(1); // Transfer command ("1") to get X sensor value;
Wire.endTransmission(); // Moved up here by frippe75
delay(100);
// GET RESPONSE
int receivedValue1 = 0;
String valprimit = "";
//String c = "";
Wire.requestFrom(SlaveDeviceId, 2);
receivedValue1 = Wire.read() << 8 | Wire.read(); // combine two bytes into integer
/*byte b[2];
//if ( Wire.available()) {
b[0] = Wire.read();
b[1] = Wire.read();
//receivedValue1 = Wire.read();
//receivedValue1 = receivedValue1 << 8;
//receivedValue1 |= Wire.read();
}
receivedValue1 = (b[0]);*/
valprimit = String(receivedValue1);
valprimit.toCharArray(valoare, 20);
client.publish("outTopic", valoare);
int error = Wire.endTransmission();
return receivedValue1;
}
//http://www.berryjam.eu/2014/07/advanced-arduino-i2c-communication/
// (c) 2014 Ignas Gramba
//
#include <Wire.h>
#include <SoftwareSerial.h>
#define SensorPin 0
#define ledPin 13
SoftwareSerial esp8266(2,3);
const byte SlaveDeviceId = 9;
byte LastMasterCommand = 0;
byte state = 0;
void setup() {
Serial.begin(9600);
esp8266.begin(115200);
Wire.begin(SlaveDeviceId); // join i2c bus with Slave ID
Wire.onReceive(receiveCommand); // register talk event
Wire.onRequest(slavesRespond); // register callback event
pinMode(SensorPin, INPUT);
pinMode(ledPin, OUTPUT);
}
void loop() {
delay(100);
//if ( esp8266.available() )
//{
// Serial.write( esp8266.read() );
//}
//float temp = (analogRead(SensorPin)*5/1024.0) - 0.5;
//temp = temp / 0.01;
//Serial.println((int)temp);
}
void receiveCommand(int howMany) {
LastMasterCommand = Wire.read(); // 1 byte (maximum 256 commands)
}
void slavesRespond() {
int returnValue = 0;
switch (LastMasterCommand) {
case 0: // No new command was received
Wire.write("NA");
break;
case 1:{ // Return X sensor value
returnValue = getValue();
Serial.print("returnValue este:"); Serial.println(returnValue);
byte b[2];
b[0] = returnValue >> 8;
Serial.println(b[0]);
b[1] = returnValue & 0xFF;
Serial.println(b[1]);
Wire.write(b, 2);
//Serial.print(b[0]);
//Serial.print(b[1]);
//Serial.print(b[2]);
LastMasterCommand = 0;
break;}
case 8: { // Return Y sensor value
returnValue = setPin();
byte buffer[2];
buffer[0] = returnValue >> 8;
buffer[1] = returnValue & 0xff;
Wire.write(buffer, 2);
Serial.print(buffer[0]);
// null last Master's command
break;}
}
LastMasterCommand = 0;
}
int getValue() {
float val1 = analogRead(SensorPin);
val1 = (val1*5/1024.0) - 0.5;
val1 = val1 / 0.01;
int val = (int) val1;
//int val = 22;
//Serial.println((int)val);
//val = (val - .5) * 100;
//int val = analogRead(SensorPin);
return val;
}
int setPin() {
state = !state;
digitalWrite(ledPin, state);
return state;
}
//http://www.berryjam.eu/2014/07/advanced-arduino-i2c-communication/
// (c) 2014 Ignas Gramba
//
#include <Wire.h>
#include <SoftwareSerial.h>
#define SensorPin 0
#define ledPin 13
SoftwareSerial esp8266(2,3);
const byte SlaveDeviceId = 9;
byte LastMasterCommand = 0;
byte state = 0;
void setup() {
Serial.begin(9600);
esp8266.begin(115200);
Wire.begin(SlaveDeviceId); // join i2c bus with Slave ID
Wire.onReceive(receiveCommand); // register talk event
Wire.onRequest(slavesRespond); // register callback event
pinMode(SensorPin, INPUT);
pinMode(ledPin, OUTPUT);
}
void loop() {
delay(100);
//if ( esp8266.available() )
//{
// Serial.write( esp8266.read() );
//}
//float temp = (analogRead(SensorPin)*5/1024.0) - 0.5;
//temp = temp / 0.01;
//Serial.println((int)temp);
}
void receiveCommand(int howMany) {
LastMasterCommand = Wire.read(); // 1 byte (maximum 256 commands)
}
void slavesRespond() {
int returnValue = 0;
switch (LastMasterCommand) {
case 0: // No new command was received
Wire.write("NA");
break;
case 1: // Return X sensor value
returnValue = getValue();
break;
case 8: // Return Y sensor value
returnValue = setPin();
break;
}
byte buffer[2];
buffer[0] = returnValue >> 8;
buffer[1] = returnValue & 0xff;
Wire.write(buffer, 2);
Serial.print(buffer[0]);
LastMasterCommand = 0;
}
int getValue() {
int val = analogRead(SensorPin);
// val1 = (val1*5/1024.0) - 0.5;
// val1 = val1 / 0.01;
// int val = (int) val1;
//int val = 22;
//Serial.println((int)val);
//val = (val - .5) * 100;
//int val = analogRead(SensorPin);
return val;
}
int setPin() {
state = !state;
digitalWrite(ledPin, state);
return state;
}
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