Hello all,
I am trying to use serial communication to send and receive data between my arduino mega and my esp 8266. Essnetially, my goal is to detect the voltage drop on an analog pin on my mega, send this info to my esp 8266, and then send an email to notify myself. To test this, I am sending the integer value 1 via serial from the mega to the esp, and then am trying to trigger the esp to do something via an if statement, but the if statement is not triggering, inexplicable to me. If anyone could help that would be great. For wiring, I am connecting digital pins 5 and 6 on the mega to tx and rx on the esp.
Here is the code being used on the Mega:
#include <SoftwareSerial.h>
SoftwareSerial espSerial(5, 6);
//DHT dht(DHTPIN, DHTTYPE);
String str;
void setup(){
Serial.begin(115200);
espSerial.begin(115200);
//dht.begin();
delay(2000);
}
void loop()
{
//float h = dht.readHumidity();
// Read temperature as Celsius (the default)
//float t = dht.readTemperature();
Serial.print(1);
espSerial.println(1);
delay(1000);
}
Here is the code on the esp
/*
Rui Santos
Complete project details at:
- ESP32: [https://RandomNerdTutorials.com/esp32-send-email-smtp-server-arduino-ide/](https://randomnerdtutorials.com/esp32-send-email-smtp-server-arduino-ide/)
- ESP8266: [https://RandomNerdTutorials.com/esp8266-nodemcu-send-email-smtp-server-arduino/](https://randomnerdtutorials.com/esp8266-nodemcu-send-email-smtp-server-arduino/)
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files.
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
Example adapted from: https://github.com/mobizt/ESP-Mail-Client
*/
#include <Arduino.h>
#if defined(ESP32)
#include <WiFi.h>
#elif defined(ESP8266)
#include <ESP8266WiFi.h>
#endif
#include <ESP_Mail_Client.h>
#define WIFI_SSID "wifi"
#define WIFI_PASSWORD "ppswrd"
/** The smtp host name e.g. [smtp.gmail.com](http://smtp.gmail.com/) for GMail or [smtp.office365.com](http://smtp.office365.com/) for Outlook or [smtp.mail.yahoo.com](http://smtp.mail.yahoo.com/) */
#define SMTP_HOST "[smtp.gmail.com](http://smtp.gmail.com/)"
#define SMTP_PORT 465
/* The sign in credentials */
#define AUTHOR_EMAIL "[[email protected]](mailto:[email protected])"
#define AUTHOR_PASSWORD "zjxb vlto oaox xqzv"
/* Recipient's email*/
#define RECIPIENT_EMAIL "[[email protected]](mailto:[email protected])"
/* Declare the global used SMTPSession object for SMTP transport */
SMTPSession smtp;
/* Callback function to get the Email sending status */
void smtpCallback(SMTP_Status status);
//variable for pin that failed
int pin = 12;
void email(int pin){
Serial.begin(115200);
Serial.println();
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
Serial.print("Connecting to Wi-Fi");
while (WiFi.status() != WL_CONNECTED){
Serial.print(".");
delay(300);
}
Serial.println();
Serial.print("Connected with IP: ");
Serial.println(WiFi.localIP());
Serial.println();
/* Set the network reconnection option */
MailClient.networkReconnect(true);
/** Enable the debug via Serial port
* 0 for no debugging
* 1 for basic level debugging
*
* Debug port can be changed via ESP_MAIL_DEFAULT_DEBUG_PORT in ESP_Mail_FS.h
*/
smtp.debug(1);
/* Set the callback function to get the sending results */
smtp.callback(smtpCallback);
/* Declare the Session_Config for user defined session credentials */
Session_Config config;
/* Set the session config */
config.server.host_name = SMTP_HOST;
config.server.port = SMTP_PORT;
config.login.email = AUTHOR_EMAIL;
config.login.password = AUTHOR_PASSWORD;
config.login.user_domain = "";
/*
Set the NTP config time
For times east of the Prime Meridian use 0-12
For times west of the Prime Meridian add 12 to the offset.
Ex. American/Denver GMT would be -6. 6 + 12 = 18
See https://en.wikipedia.org/wiki/Time_zone for a list of the GMT/UTC timezone offsets
*/
config.time.ntp_server = F("[pool.ntp.org](http://pool.ntp.org/),[time.nist.gov](http://time.nist.gov/)");
config.time.gmt_offset = 3;
config.time.day_light_offset = 0;
/* Declare the message class */
SMTP_Message message;
/* Set the message headers */
message.sender.name = F("ESP");
message.sender.email = AUTHOR_EMAIL;
message.subject = F("ESP Test Email");
message.addRecipient(F("me"), RECIPIENT_EMAIL);
/*Send HTML message*/
/*String htmlMsg = "<div style=\"color:#2f4468;\"><h1>Hello World!</h1><p>- Sent from ESP board</p></div>";
message.html.content = htmlMsg.c_str();
message.html.content = htmlMsg.c_str();
message.text.charSet = "us-ascii";
message.html.transfer_encoding = Content_Transfer_Encoding::enc_7bit;*/
//Send raw text message
String PF;
PF= String(pin);
String textMsg;
textMsg= PF + " failed";
message.text.content = textMsg.c_str();
message.text.charSet = "us-ascii";
message.text.transfer_encoding = Content_Transfer_Encoding::enc_7bit;
message.priority = esp_mail_smtp_priority::esp_mail_smtp_priority_low;
message.response.notify = esp_mail_smtp_notify_success | esp_mail_smtp_notify_failure | esp_mail_smtp_notify_delay;
/* Connect to the server */
if (!smtp.connect(&config)){
ESP_MAIL_PRINTF("Connection error, Status Code: %d, Error Code: %d, Reason: %s", smtp.statusCode(), smtp.errorCode(), smtp.errorReason().c_str());
return;
}
if (!smtp.isLoggedIn()){
Serial.println("\nNot yet logged in.");
}
else{
if (smtp.isAuthenticated())
Serial.println("\nSuccessfully logged in.");
else
Serial.println("\nConnected with no Auth.");
}
/* Start sending Email and close the session */
if (!MailClient.sendMail(&smtp, &message))
ESP_MAIL_PRINTF("Error, Status Code: %d, Error Code: %d, Reason: %s", smtp.statusCode(), smtp.errorCode(), smtp.errorReason().c_str());
}
void setup(){
email(1);
}
void loop(){
// Open serial communications and wait for port to open:
//Serial.begin(115200);
//while (!Serial) {
//; // wait for serial port to connect. Needed for native USB port only
//}
if (Serial.available()) {
//Serial.write(Serial.read());
int coms = Serial.read();
Serial.write(coms);
if (coms == 1){
Serial.write("test");
email(1);
}
else{
Serial.write("bruh")
}
}
}
/* Callback function to get the Email sending status */
void smtpCallback(SMTP_Status status){
/* Print the current status */
Serial.println(status.info());
/* Print the sending result */
if (status.success()){
// ESP_MAIL_PRINTF used in the examples is for format printing via debug Serial port
// that works for all supported Arduino platform SDKs e.g. AVR, SAMD, ESP32 and ESP8266.
// In ESP8266 and ESP32, you can use Serial.printf directly.
Serial.println("----------------");
ESP_MAIL_PRINTF("Message sent success: %d\n", status.completedCount());
ESP_MAIL_PRINTF("Message sent failed: %d\n", status.failedCount());
Serial.println("----------------\n");
for (size_t i = 0; i < smtp.sendingResult.size(); i++)
{
/* Get the result item */
SMTP_Result result = smtp.sendingResult.getItem(i);
// In case, ESP32, ESP8266 and SAMD device, the timestamp get from result.timestamp should be valid if
// your device time was synched with NTP server.
// Other devices may show invalid timestamp as the device time was not set i.e. it will show Jan 1, 1970.
// You can call smtp.setSystemTime(xxx) to set device time manually. Where xxx is timestamp (seconds since Jan 1, 1970)
ESP_MAIL_PRINTF("Message No: %d\n", i + 1);
ESP_MAIL_PRINTF("Status: %s\n", result.completed ? "success" : "failed");
ESP_MAIL_PRINTF("Date/Time: %s\n", MailClient.Time.getDateTimeString(result.timestamp, "%B %d, %Y %H:%M:%S").c_str());
ESP_MAIL_PRINTF("Recipient: %s\n", result.recipients.c_str());
ESP_MAIL_PRINTF("Subject: %s\n", result.subject.c_str());
}
Serial.println("----------------\n");
// You need to clear sending result as the memory usage will grow up.
smtp.sendingResult.clear();
}
}
