i have bought Smallest SIM800L GPRS GSM Module MicroSIM Card Core BOard Quad-band TTL Serial Port
but i never work with GSM module ...
so can you pls have me guide and give me some sample ..
I worked with SIM900,
you need download AT command manual of your GSM modem and with a microcontroller like AVR family send AT commands to module by serial port,
commands are like this sample : AT+CMGS for sending SMS
AT command protocol is very simple , you can easy develop your project.