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---
-- Working Example: https://www.youtube.com/watch?v=CcRbFIJ8aeU
-- @description a basic SMTP email example. You must use an account which can provide unencrypted authenticated access.
-- This example was tested with an AOL and Time Warner email accounts. GMail does not offer unecrypted authenticated access.
-- To obtain your email's SMTP server and port simply Google it e.g. [my email domain] SMTP settings
-- For example for timewarner you'll get to this page http://www.timewarnercable.com/en/support/faqs/faqs-internet/e-mailacco/incoming-outgoing-server-addresses.html
-- To Learn more about SMTP email visit:
-- SMTP Commands Reference - http://www.samlogic.net/articles/smtp-commands-reference.htm
-- See "SMTP transport example" in this page http://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol
-- @author Miguel
require("base64")
-- The email and password from the account you want to send emails from
local MY_EMAIL = "esp8266@domain.com"
local EMAIL_PASSWORD = "123456"
-- The SMTP server and port of your email provider.
-- If you don't know it google [my email provider] SMTP settings
local SMTP_SERVER = "smtp.server.com"
local SMTP_PORT = "587"
-- The account you want to send email to
local mail_to = "to_email@domain.com"
-- Your access point's SSID and password
local SSID = "ssid"
local SSID_PASSWORD = "password"
-- configure ESP as a station
wifi.setmode(wifi.STATION)
wifi.sta.config(SSID,SSID_PASSWORD)
wifi.sta.autoconnect(1)
-- These are global variables. Don't change their values
-- they will be changed in the functions below
local email_subject = ""
local email_body = ""
local count = 0
local smtp_socket = nil -- will be used as socket to email server
-- The display() function will be used to print the SMTP server's response
function display(sck,response)
print(response)
end
-- The do_next() function is used to send the SMTP commands to the SMTP server in the required sequence.
-- I was going to use socket callbacks but the code would not run callbacks after the first 3.
function do_next()
if(count == 0)then
count = count+1
local IP_ADDRESS = wifi.sta.getip()
smtp_socket:send("HELO "..IP_ADDRESS.."\r\n")
elseif(count==1) then
count = count+1
smtp_socket:send("AUTH LOGIN\r\n")
elseif(count == 2) then
count = count + 1
smtp_socket:send(base64.enc(MY_EMAIL).."\r\n")
elseif(count == 3) then
count = count + 1
smtp_socket:send(base64.enc(EMAIL_PASSWORD).."\r\n")
elseif(count==4) then
count = count+1
smtp_socket:send("MAIL FROM:<" .. MY_EMAIL .. ">\r\n")
elseif(count==5) then
count = count+1
smtp_socket:send("RCPT TO:<" .. mail_to ..">\r\n")
elseif(count==6) then
count = count+1
smtp_socket:send("DATA\r\n")
elseif(count==7) then
count = count+1
local message = string.gsub(
"From: \"".. MY_EMAIL .."\"<"..MY_EMAIL..">\r\n" ..
"To: \"".. mail_to .. "\"<".. mail_to..">\r\n"..
"Subject: ".. email_subject .. "\r\n\r\n" ..
email_body,"\r\n.\r\n","")
smtp_socket:send(message.."\r\n.\r\n")
elseif(count==8) then
count = count+1
tmr.stop(0)
smtp_socket:send("QUIT\r\n")
else
smtp_socket:close()
end
end
-- The connectted() function is executed when the SMTP socket is connected to the SMTP server.
-- This function will create a timer to call the do_next function which will send the SMTP commands
-- in sequence, one by one, every 5000 seconds.
-- You can change the time to be smaller if that works for you, I used 5000ms just because.
function connected(sck)
tmr.alarm(0,5000,1,do_next)
end
-- @name send_email
-- @description Will initiated a socket connection to the SMTP server and trigger the connected() function
-- @param subject The email's subject
-- @param body The email's body
function send_email(subject,body)
count = 0
email_subject = subject
email_body = body
smtp_socket = net.createConnection(net.TCP,0)
smtp_socket:on("connection",connected)
smtp_socket:on("receive",display)
smtp_socket:connect(SMTP_PORT,SMTP_SERVER)
end
-- Send an email
send_email(
"ESP8266",
[[Hi,
How are your IoT projects coming along?
Best Wishes,
ESP8266]])
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