Dear Sir,
We have a in house facility to develop a product as per requirement of client. I have a 6+ year experience in embedded firmware, Electronics circuit design and PCB layout design.
In the past I completed same project based on GSM modem and modbus.
I am able to send Schematic with Mod bus communication ,Micro controller and GSM modem.
By looking at your requirement i am interested to work with you.
Looking forward to your valued reply.
Regards
Ravi.