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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 unencrypted 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
- -- 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 timer
- 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
- local function display(sck, response) -- luacheck: no unused
- 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.
- local 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(encoder.toBase64(MY_EMAIL).."\r\n")
- elseif(count == 3) then
- count = count + 1
- smtp_socket:send(encoder.toBase64(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
- timer:stop()
- smtp_socket:send("QUIT\r\n")
- else
- smtp_socket:close()
- end
- end
- -- The connected() 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.
- local function connected()
- timer = tmr.create()
- timer:alarm(5000, tmr.ALARM_AUTO, 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
- local 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
- do
- -- Send an email
- send_email(
- "ESP8266",
- [[Hi,
- How are your IoT projects coming along?
- Best Wishes,
- ESP8266]]
- )
- end
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