Hi,
I, Delhi based software developer with experience in embedded, C#, .Net, database, networking, GSM modem, GPS, GPRS and lot more.
FYI, being in embedded domain, I have worked along on reading/writing data on ports like serial or using other interfaces like SPI, I2C etc.
So I may prove to be best for such requirement.
Costing and timelines can be negotiated once you share the complete details