ESP8266 Community Forum

- Mon Dec 28, 2015 9:20 am #37320 Im a total newbie, working with a Adafruit Huzzah esp8266. I loaded NODEMCU with sucess and was able to send an email using LUA with the code below (copied from someone's project). I'd like to be able to send an email on a simple event like one of the GPIO's going high. Any thoughts ????

require("Base64")

-- The email and password from the account you want to send emails from
local MY_EMAIL = "XXXXXXXXX@gmail.com"
local EMAIL_PASSWORD = "XXXXXXXX"
local SMTP_SERVER = "mail.smtp2go.com"
local SMTP_PORT = "2525"

-- The account you want to send email to
local mail_to = "XXXXXXXXXX@gmail.com"

-- Your access point's SSID and password
local SSID = "XXXXXXXXXX"
local SSID_PASSWORD = "XXXXXXXX"

-- 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]])

- Thu Jan 28, 2016 10:32 pm #39911 I found the same code via YouTube, but keep getting dns retry errors. I am going to clear memory his weekend and give it another try.

As for how to handle your item, I planned on placing this email function in a separate script. I was going to create a main script to handle the monitoring of the gpio1 or gpio2 until it pulled high. On that was detected, I was going to then call this script to send my notice.

Hope this helps.