Telegram message with blocking

[AlexLV]

Hi, 

Boiler status I receive from powertag, updating periodically. I want message to telegram should be sent only once, when status changed. But my simple script not working, could not find where is the problem.. 

Can you please check where I am wrong..

Code:

require("user.telegram")

local statuss = event.getvalue('42/2/10')----Boiler status
local alarm = event.getvalue('0/0/102') ---alarm status
--log(statuss)
--log (alarm)
if statuss == true then
if alarm == false then
     message = 'Бойлер включен' ---message is not working, boiler is on
telegram(message)
grp.write('0/0/102', true)  -- trying to block next alarm
    alarm = true -- t
end
else
message = 'Бойлер выключен' --message working, boiler is off
  telegram(message)
    grp.write('0/0/102', false) -- trying to unblock next alarm when statuss is changed
  alarm = false
end

Alex