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 -- create a socket to the SMTP server local smtp_socket = net.createConnection(net.TCP,0) -- 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) email_subject = subject email_body = body 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]])