Hello,
My name is Andrei, i am a Romanian IOT Developer with a lot of experience in IOT projects and automatics .
I sow your project and seams to be interesting for me because i know the issue , and i have solved several times .
i need to know , the GSM/GPR board type and the structure of the code ,to can provide you a solution .
I am providing Clean solutions and clear code well explained
Regards,
Andrei