Twillo sms repeating

when i set a code for sms alert system by using twillo on using codeing on ubuntu ,but every time when code execute twillo send sms and repeating
.how can i solve this problem

Share your code so we can help you out


Can you share the code so that we can debug your issue?

when code run , when sensor value <= 300 i get messages from twillow “light on” in every second .it is repeating .but i want sms just before light on at one time how can i modify my code.