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AsyncHTTPRequest_ESP8266_Ethernet.ino
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AsyncHTTPRequest_ESP8266_Ethernet.ino
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/****************************************************************************************************************************
AsyncHTTPRequest_ESP.ino - Dead simple AsyncHTTPRequest for ESP8266, ESP32 and currently STM32 with built-in LAN8742A Ethernet
For ESP8266, ESP32 and STM32 with built-in LAN8742A Ethernet (Nucleo-144, DISCOVERY, etc)
AsyncHTTPRequest_Generic is a library for the ESP8266, ESP32 and currently STM32 run built-in Ethernet WebServer
Based on and modified from asyncHTTPrequest Library (https://github.com/boblemaire/asyncHTTPrequest)
Built by Khoi Hoang https://github.com/khoih-prog/AsyncHTTPRequest_Generic
Licensed under MIT license
Copyright (C) <2018> <Bob Lemaire, IoTaWatt, Inc.>
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License
as published bythe Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
*****************************************************************************************************************************/
//************************************************************************************************************
//
// There are scores of ways to use AsyncHTTPRequest. The important thing to keep in mind is that
// it is asynchronous and just like in JavaScript, everything is event driven. You will have some
// reason to initiate an asynchronous HTTP request in your program, but then sending the request
// headers and payload, gathering the response headers and any payload, and processing
// of that response, can (and probably should) all be done asynchronously.
//
// In this example, a Ticker function is setup to fire every 300 seconds to initiate a request.
// Everything is handled in AsyncHTTPRequest without blocking.
// The callback onReadyStateChange is made progressively and like most JS scripts, we look for
// readyState == 4 (complete) here. At that time the response is retrieved and printed.
//
// Note that there is no code in loop(). A code entered into loop would run oblivious to
// the ongoing HTTP requests. The Ticker could be removed and periodic calls to sendRequest()
// could be made in loop(), resulting in the same asynchronous handling.
//
// For demo purposes, debug is turned on for handling of the first request. These are the
// events that are being handled in AsyncHTTPRequest. They all begin with Debug(nnn) where
// nnn is the elapsed time in milliseconds since the transaction was started.
//
//*************************************************************************************************************
#if !( defined(ESP8266) )
#error This code is intended to run on the ESP8266 platform! Please check your Tools->Board setting.
#endif
// Level from 0-4
#define ASYNC_HTTP_DEBUG_PORT Serial
#define _ASYNC_HTTP_LOGLEVEL_ 1
// 300s = 5 minutes to not flooding
#define HTTP_REQUEST_INTERVAL 60 //300
// 10s
#define HEARTBEAT_INTERVAL 10
//////////////////////////////////////////////////////////
#define USING_W5500 true
#define USING_W5100 false
#define USING_ENC28J60 false
#include <SPI.h>
#define CSPIN 16 // 5
#if USING_W5500
#include "W5500lwIP.h"
#define SHIELD_TYPE "ESP8266_W5500 Ethernet"
Wiznet5500lwIP eth(CSPIN);
#elif USING_W5100
#include <W5100lwIP.h>
#define SHIELD_TYPE "ESP8266_W5100 Ethernet"
Wiznet5100lwIP eth(CSPIN);
#elif USING_ENC28J60
#include <ENC28J60lwIP.h>
#define SHIELD_TYPE "ESP8266_ENC28J60 Ethernet"
ENC28J60lwIP eth(CSPIN);
#else
// default if none selected
#include "W5500lwIP.h"
Wiznet5500lwIP eth(CSPIN);
#endif
#include <WiFiClient.h> // WiFiClient (-> TCPClient)
using TCPClient = WiFiClient;
//////////////////////////////////////////////////////////
#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET "AsyncHTTPRequest_Generic v1.7.1"
#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN 1007001
// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
#include <AsyncHTTPRequest_Generic.h> // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
#include <Ticker.h>
AsyncHTTPRequest request;
Ticker ticker;
Ticker ticker1;
void heartBeatPrint()
{
static int num = 1;
if (eth.connected())
Serial.print(F("H")); // H means connected to Ethernet
else
Serial.print(F("F")); // F means not connected to Ethernet
if (num == 80)
{
Serial.println();
num = 1;
}
else if (num++ % 10 == 0)
{
Serial.print(F(" "));
}
}
void sendRequest()
{
static bool requestOpenResult;
if (request.readyState() == readyStateUnsent || request.readyState() == readyStateDone)
{
//requestOpenResult = request.open("GET", "https://worldtimeapi.org/api/timezone/Europe/London.txt");
requestOpenResult = request.open("GET", "https://worldtimeapi.org/api/timezone/America/Toronto.txt");
if (requestOpenResult)
{
// Only send() if open() returns true, or crash
request.send();
}
else
{
Serial.println(F("Can't send bad request"));
}
}
else
{
Serial.println(F("Can't send request"));
}
}
void requestCB(void* optParm, AsyncHTTPRequest* request, int readyState)
{
(void) optParm;
if (readyState == readyStateDone)
{
Serial.println(F("\n**************************************"));
Serial.println(request->responseText());
Serial.println(F("**************************************"));
request->setDebug(false);
}
}
void initEthernet()
{
SPI.begin();
SPI.setClockDivider(SPI_CLOCK_DIV4);
SPI.setBitOrder(MSBFIRST);
SPI.setDataMode(SPI_MODE0);
eth.setDefault();
if (!eth.begin())
{
Serial.println("No Ethernet hardware ... Stop here");
while (true)
{
delay(1000);
}
}
else
{
Serial.print("Connecting to network : ");
while (!eth.connected())
{
Serial.print(".");
delay(1000);
}
}
Serial.println();
Serial.print("Ethernet IP address: ");
Serial.println(eth.localIP());
}
void setup()
{
// put your setup code here, to run once:
Serial.begin(115200);
while (!Serial && millis() < 5000);
delay(200);
Serial.print(F("\nStarting AsyncHTTPRequest_ESP8266_Ethernet on ")); Serial.print(ARDUINO_BOARD);
Serial.print(F(" using ")); Serial.println(SHIELD_TYPE);
Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION);
initEthernet();
request.setDebug(false);
request.onReadyStateChange(requestCB);
ticker.attach(HTTP_REQUEST_INTERVAL, sendRequest);
ticker1.attach(HEARTBEAT_INTERVAL, heartBeatPrint);
// Send first request now
sendRequest();
}
void loop()
{
}