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Arduino Mega 2560 + ESP8266-01
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Arduino Mega 2560 + ESP8266-01
mashuca1h
I would like some help to connect an Arduino Mega 2560 with a ESP8266-01 linked in serial 2.
I could connect on the internet using some “AT Comands”, but I could not connect in Cayenne.
Someone could help me with this.
Tks
Follow my sketch:
/****************************************************************
* ESP8266
* Arduino Mega Using Serial2
* AT commands examples for test:
* AT =====> ESP8266 returns OK
* AT+RST =====> ESP8266 restart and returns OK
* AT+GMR =====> ESP8266 returns AT Version; SDK version; id; OK
* AT+CWMODE? => ESP8266 returns mode type
* AT+CWLAP ===> ESP8266 returs close access points
* AT+CIFSR ===> ESP8266 returs designided IP
* AT+CIPMUX=1 ==>Set ESP8266 for multoples conections
* AT+CIOBAUD=9600 ==>Change Baudrate ==> ESP8266 returs OK
* AT+CIPSERVER=1,80 ==> set modo SERVER port: 4040
* AT+CWMODE=3 ==> Conect ESP8266 ascombined mode (Access Point (2) and Server (1))
* AT+CWSAP="Acc_Point_name","password",wifi_Channel,cript# ==> ej. AT+CWSAP="ESP_8266_AP,"1234",3,0
* AT+CWJAP="SSID","password" ==> Connect to WiFi network
* AT+CWJAP="ROVAI TIMECAP","mjr747@1"
*
* Marcelo Jose Rovai 18Jan16
******************************************************************/
#define CAYENNE_PRINT Serial // Comment this out to disable prints and save space
#include <doxygen.h>
#include <ESP8266.h>
#define esp8266 Serial2
#define CH_PD 4
#define speed8266 19200 // This is the speed that worked with my ESP8266
//Coloque nos campos indicados o nome e senha da sua rede WiFi
#define SSID "Vick Cristina Barcelona"
#define PASSWORD "rafa0402"
// Token de Autenticação do Cayenne Mydevices
char token[] = "27hmhv6grc";
//Cria objeto de conexão wifi com o módulo, usando a Serial1 do Mega.
ESP8266 wifi(Serial2);
void setup(void)
{
pinMode(CH_PD,OUTPUT);
digitalWrite(CH_PD,HIGH); //setado em ALTO - operacao normal
esp8266.begin (speed8266);
Serial.begin(9600);
//reset8266(); // Pin CH_PD need a reset before start communication
Serial.println("Iniciando Setup.");
Serial.print("Versao de Firmware ESP8266: ");
//A funcao wifi.getVersion() retorna a versao de firmware informada pelo modulo no inicio da comunicacao
Serial.println(wifi.getVersion().c_str());
//Vamos setar o modulo para operar em modo Station (conecta em WiFi) e modo AP (é um ponto de WiFi tambem)
if (wifi.setOprToStationSoftAP()) {
Serial.println("Station e AP OK.");
} else {
Serial.println("Erro em setar Station e AP.");
}
//Agora vamos conectar no ponto de WiFi informado no inicio do codigo, e ver se corre tudo certo
if (wifi.joinAP(SSID, PASSWORD)) {
Serial.println("Conectado com Sucesso.");
Serial.println("IP: ");
//rotina wifi.getLocalIP() retorna o IP usado na conexao com AP conectada.
Serial.println(wifi.getLocalIP().c_str());
} else {
Serial.println("Falha na conexao AP.");
}
//Agora vamos habiliar a funcionalidade MUX, que permite a realizacao de varias conexoes TCP/UDP
if (wifi.enableMUX()) {
Serial.println("Multiplas conexoes OK.");
} else {
Serial.println("Erro ao setar multiplas conexoes.");
}
//Inicia servidor TCP na porta 8090 (veja depois a funcao "startServer(numero_porta)", que serve para UDP!
if (wifi.startTCPServer(8090)) {
Serial.println("Servidor iniciado com sucesso.");
} else {
Serial.println("Erro ao iniciar servidor.");
}
Serial.println("Setup finalizado!");
// Cayenne.begin(token, ssid, password);
// Cayenne.config(token); //If this doesn't work, try Blynk.config(token);
}
//Na conexao TCP, basicamente a funcionalidade a ser mostrada sera a de "echo", ou seja, a aplicacao ira retornar todos os //dados enviados para ela via socket TCP.
void loop(void)
{
//Variavel para buffer de dados de trasmissao
uint8_t buffer[128] = {0};
//Como usamos multiplas conexoes, cada conexao tem sua ID, e precisa ser armazenada para referencia no programa. Usamos //essa variavel para isso.
uint8_t mux_id;
//E esta variavel len serve para armazenar o comprimento de dados recebidos por meio da rotina wifi.recv(), que tambem //associa ao buffer os dados recebidos e ao mux_id a id responsavel pela transmissao
uint32_t len = wifi.recv(&mux_id, buffer, sizeof(buffer), 100);
if (len > 0) {
Serial.print("Status:[");
Serial.print(wifi.getIPStatus().c_str());
Serial.println("]");
Serial.print("Recebido de :");
Serial.print(mux_id);
Serial.print("[");
for(uint32_t i = 0; i < len; i++) {
Serial.print((char)buffer[i]);
}
Serial.print("]\r\n");
//Agora envia de volta. A referencia para o socket TCP criado é o mux_id, ou id da conexao, usado aqui na rotina
//wifi.send, veja abaixo:
if(wifi.send(mux_id, buffer, len)) {
Serial.print("Enviado de volta...\r\n");
} else {
Serial.print("Erro ao enviar de volta\r\n");
}
//E, como sempre, liberar a conexao TCP, de modo a permitir que novas conexoes sejam realizadas.
if (wifi.releaseTCP(mux_id)) {
Serial.print("Liberando conexao TCP com ID: ");
Serial.print(mux_id);
Serial.println(" OK");
} else {
Serial.print("Erro ao liberar TCP com ID: ");
Serial.print(mux_id);
}
Serial.print("Status:[");
Serial.print(wifi.getIPStatus().c_str());
Serial.println("]");
}
// Cayenne.run();
delay(100);
Serial.print(".");
}
// Reset funtion to accept communication
void reset8266 ()
{
pinMode(CH_PD, OUTPUT);
digitalWrite(CH_PD, LOW);
delay(300);
digitalWrite(CH_PD, HIGH);
}
