Hi,
I have more than 8 years of experience in embedded system product design and development. I have expertise in IoT product development based on WiFi,BLE,GSM,GPS,LTE,RF,ZigBee etc. I have great experience in product design using various MCUs with different peripherals,sensors(accelerometer,gyroscope,temperature sensor,humidity sensor,light sensor,CO2 sensor,pH sensor,heart rate sensor,load cell sensor,magnetometer and many more),displays(LCD,OLED etc.),motors(servo,stepper,bldc),batteries(LiPO,LiIon,AA,AAA,Alkaline) and other analog/digital parts.
I have Atmega 2560 development board and SIM900A gsm modem with RS232. I have already worked on SIM900A for different applications like data sending using http get/post, ftp, tcp etc.
Let's discuss about your complete requirement.