Two ESP8266's (ESP-12), and one Arduino MEGA.
Posted: Mon Jul 03, 2017 6:54 pmI have tried using an Arduino MEGA to host an html page, while one esp8266 connects to a access point and sends GET requests.
My current code only has LEDs set up, because I wanted to check out how many buttons the print functions can hold. The important code begins in the loop function. That's where all the GET requests are started. The code was taken from an example in the WiFiEsp.h library. Here is what my code looks like:
This code works, until you add too many html buttons. Then it starts working slowly, or loads forever. This current set up is very inefficient, and will not work with what I want to do. So, I thought of an idea, and would like to see if it works.
I have two esp8266 breakout boards, and would like to upload code to the arduino mega that controls motors. I have a total of eight motors. Four standard sized servos, and four worm gear DC motors. I have a servo shield for the servos, and a motor shield for the DC motors. What I was wondering, is if I can have one esp host an html page, while the other esp connects to that html page using code that controls motors on the arduino. I want to host an html page that has buttons to control motors on it, but that seems too intensive for my current setup. Is that possible? To have two esps act as a client and access point, and have the arduino store the code that moves motors.
Is there anyone that has a similar setup that can help me out? Maybe there are some tutorials out there that can help me in this situation?
My current code only has LEDs set up, because I wanted to check out how many buttons the print functions can hold. The important code begins in the loop function. That's where all the GET requests are started. The code was taken from an example in the WiFiEsp.h library. Here is what my code looks like:
Code: Select all
#include <WiFiEsp.h>
#include <WiFiEspClient.h>
#include <WiFiEspServer.h>
#include <WiFiEspUdp.h>
#include <Servo.h>
#include <Wire.h>
#include <Adafruit_MotorShield.h>
#include "utility/Adafruit_MS_PWMServoDriver.h"
/*
WiFiEsp example: WebServerLed
A simple web server that lets you turn on and of an LED via a web page.
This sketch will print the IP address of your ESP8266 module (once connected)
to the Serial monitor. From there, you can open that address in a web browser
to turn on and off the LED on pin 13.
For more details see: http://yaab-arduino.blogspot.com/p/wifiesp.html
*/
// Emulate Serial1 on pins 6/7 if not present
#ifndef HAVE_HWSERIAL1
#include <SoftwareSerial.h>
SoftwareSerial Serial2(17, 16); // RX, TX
#endif
char ssid[] = "SSID"; // your network SSID (name)
char pass[] = "password"; // your network password
int status = WL_IDLE_STATUS;
int ledStatusBLUE = LOW;
int ledStatusRED = LOW;
int ledStatusYELLOW = LOW;
int ledStatusGREEN = LOW;
int BLUE_LED = 6;
int RED_LED = 5;
int YELLOW_LED = 4;
int GREEN_LED = 3;
WiFiEspServer server(80);
Servo servo1;
Adafruit_MotorShield AFMS = Adafruit_MotorShield();
Adafruit_DCMotor *myMotor1 = AFMS.getMotor(1);
Adafruit_DCMotor *myMotor2 = AFMS.getMotor(3);
int pos = 0;
// use a ring buffer to increase speed and reduce memory allocation
RingBuffer buf(8);
void setup()
{
pinMode(BLUE_LED, OUTPUT); // initialize digital pin LED_BUILTIN as an output.
pinMode(RED_LED, OUTPUT);
pinMode(YELLOW_LED, OUTPUT);
pinMode(GREEN_LED, OUTPUT);
Serial.begin(115200); // initialize serial for debugging
Serial2.begin(115200); // initialize serial for ESP module
WiFi.init(&Serial2); // initialize ESP module
AFMS.begin();
// check for the presence of the shield
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
// don't continue
while (true);
}
// attempt to connect to WiFi network
while (status != WL_CONNECTED) {
Serial.print("Attempting to connect to WPA SSID: ");
Serial.println(ssid);
// Connect to WPA/WPA2 network
status = WiFi.begin(ssid, pass);
}
Serial.println("You're connected to the network");
printWifiStatus();
// start the web server on port 80
server.begin();
servo1.attach(9);
servo1.write(90);
myMotor1->setSpeed(150);
//myMotor1->run(FORWARD);
// turn on motor
//myMotor1->run(RELEASE);
}
void loop()
{
WiFiEspClient client = server.available(); // listen for incoming clients
if (client) { // if you get a client,
Serial.println("New client"); // print a message out the serial port
buf.init(); // initialize the circular buffer
while (client.connected()) { // loop while the client's connected
if (client.available()) { // if there's bytes to read from the client,
char c = client.read(); // read a byte, then
buf.push(c); // push it to the ring buffer
// printing the stream to the serial monitor will slow down
// the receiving of data from the ESP filling the serial buffer
//Serial.write(c);
// you got two newline characters in a row
// that's the end of the HTTP request, so send a response
if (buf.endsWith("\r\n\r\n")) {
sendHttpResponse(client);
break;
}
// Check to see if the client request was "GET /H" or "GET /L":
if (buf.endsWith("GET /HB")) {
Serial.println("Turn led ON");
ledStatusBLUE = HIGH;
digitalWrite(BLUE_LED, HIGH); // turn the LED on (HIGH is the voltage level)
}
else if (buf.endsWith("GET /LB")) {
Serial.println("Turn led OFF");
ledStatusBLUE = LOW;
digitalWrite(BLUE_LED, LOW); // turn the LED off by making the voltage LOW
}
else if (buf.endsWith("GET /HR")) {
Serial.println("Turn led ON");
ledStatusRED = HIGH;
digitalWrite(RED_LED, HIGH); // turn the LED on (HIGH is the voltage level)
}
else if (buf.endsWith("GET /LR")) {
Serial.println("Turn led OFF");
ledStatusRED = LOW;
digitalWrite(RED_LED, LOW); // turn the LED off by making the voltage LOW
}
else if (buf.endsWith("GET /HY")) {
Serial.println("Turn led ON");
ledStatusYELLOW = HIGH;
digitalWrite(YELLOW_LED, HIGH); // turn the LED on (HIGH is the voltage level)
}
else if (buf.endsWith("GET /LY")) {
Serial.println("Turn led OFF");
ledStatusYELLOW = LOW;
digitalWrite(YELLOW_LED, LOW); // turn the LED off by making the voltage LOW
}
else if (buf.endsWith("GET /HG")) {
Serial.println("Turn led ON");
ledStatusGREEN = HIGH;
digitalWrite(GREEN_LED, HIGH); // turn the LED on (HIGH is the voltage level)
}
else if (buf.endsWith("GET /LG")) {
Serial.println("Turn led OFF");
ledStatusGREEN = LOW;
digitalWrite(GREEN_LED, LOW); // turn the LED off by making the voltage LOW
}/* else if (buf.endsWith("GET /SR")) { //Turning the servo to the right
while (pos < 180) {
servo1.write(pos++);
delay(5);
}
} else if (buf.endsWith("GET /SL")) { //Just testing turning the servo to the left
while(pos > 3) {
servo1.write(pos--);
delay(5);
}
}*/ /*else if (buf.endsWith("GET /M")) { //this command moves the DC motor forward
myMotor1->run(FORWARD);
} else if (buf.endsWith("GET /MS")) { //this command moves the DC motor backwards
myMotor1->run(BACKWARD);
}*/
}
}
// close the connection
client.stop();
Serial.println("Client disconnected");
}
}
void sendHttpResponse(WiFiEspClient client)
{
// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
// and a content-type so the client knows what's coming, then a blank line:
client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html");
client.println();
// the content of the HTTP response follows the header:
//client.println("<script src=\"keypress.js\"></script>");
client.println("<br><br>Click <a href=\"/HB\">here</a> turn the LED on<br>Click <a href=\"/LB\">here</a> turn the LED off<br>Click <a href=\"/HR\">here</a> turn the LED on<br>Click <a href=\"/LR\">here</a> turn the LED off<br>");
client.println("Click <a href=\"/HY\">here</a> turn the LED on<br>Click <a href=\"/LY\">here</a> turn the LED off<br>Click <a href=\"/HG\">here</a> turn the LED on<br>Click <a href=\"/LG\">here</a> turn the LED off<br>");
//client.println("Click <a href=\"/HR\">here</a> turn the LED on<br>Click <a href=\"/LR\">here</a> turn the LED off<br>");
//client.println("Click <a href=\"/HY\">here</a> turn the LED on<br>Click <a href=\"/LY\">here</a> turn the LED off<br>");
//client.println("Click <a href=\"/HG\">here</a> turn the LED on<br>Click <a href=\"/LG\">here</a> turn the LED off<br>");
//client.println();
//client.println("Click <a href=\"/SR\">here</a> to turn servo right<br>");
//client.println("Click <a href=\"/SL\">here</a> to turn servo left<br>");
//client.println("Click <a href=\"/M\">here</a> turn motor<br>");
//client.println("Click <a href=\"/MS\">here</a> stop motor<br>");
// The HTTP response ends with another blank line:
client.println();
}
void printWifiStatus()
{
// print the SSID of the network you're attached to
Serial.print("SSID: ");
Serial.println(WiFi.SSID());
// print your WiFi shield's IP address
IPAddress ip = WiFi.localIP();
Serial.print("IP Address: ");
Serial.println(ip);
// print where to go in the browser
Serial.println();
Serial.print("To see this page in action, open a browser to http://");
Serial.println(ip);
Serial.println();
}This code works, until you add too many html buttons. Then it starts working slowly, or loads forever. This current set up is very inefficient, and will not work with what I want to do. So, I thought of an idea, and would like to see if it works.
I have two esp8266 breakout boards, and would like to upload code to the arduino mega that controls motors. I have a total of eight motors. Four standard sized servos, and four worm gear DC motors. I have a servo shield for the servos, and a motor shield for the DC motors. What I was wondering, is if I can have one esp host an html page, while the other esp connects to that html page using code that controls motors on the arduino. I want to host an html page that has buttons to control motors on it, but that seems too intensive for my current setup. Is that possible? To have two esps act as a client and access point, and have the arduino store the code that moves motors.
Is there anyone that has a similar setup that can help me out? Maybe there are some tutorials out there that can help me in this situation?