hi. I'm communication systems engineer by qualification, having 5+ years of experience in hardware-software integration. I have worked with a variety of hardware modules e.g. Digital and Analog IO cards, Weighing cards, PLC, attendance deviecs, GSM, GPS, label printers etc. I have used RS232, Modbus, TCP/IP for connecting to hardware. here are a couple of my past projects related to hardware interfacing: ---( https://www.freelancer.com/jobs/project-16686999/ )--- and ---( https://www.freelancer.com/jobs/project-17920080/ )--- I'm very interested in working with you. I have a lot of experience in relevant domain. let's discuss further and do it. waiting for your response...