Serial Port Interfacing Jobs

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Hourly - Expert ($$$) - Est. Time: 1 to 3 months, 30+ hrs/week - Posted
I am wanting to integrate an 900 mhz OEM RF Module with a Raspberry PI. The OEM RF Module must be bridged with the ethernet port in the Raspberry PI. The OEM RF Module has available to it several modulation, speed, and payload settings that need to be made available to users as configurable options via a web server on the raspberry PI. The OEM Module will come with an API to interface with the Raspberry PI and interfaces via TTL via 24pin Samtec Connector. First portion of the job will be to consult on the design of the interface both Hardware and Software. Successful completion of the project will be a working 900mhz ethernet radio using the PI board interfaced with the OEM RF Module, that is configurable by users via web server hosted on the PI. Other improvements will be included after successful delivery of the radio.
Skills: Serial Port Interfacing Raspberry Pi User interface design
Hourly - Expert ($$$) - Est. Time: 1 to 3 months, 10-30 hrs/week - Posted
We are at the tail end of building the first Bluetooth controlled exercise weight machine. We are seeing some interference issues and stability issues. I'm looking for an RF engineer that has experience in the various methods of RF Signal transmission. If you have worked with RC controllers, Bluetooth, or Wifi on embedded systems, I'd like to get your help. It is our goal to build a reliable and fail safe system. Signal integrity and critical mission protocol would be ideal. Please let me know if you are interested. Check us out on www.flexlinefitness.com Long term opportunity is also available. -Brandon Chief Product Officer
Skills: Serial Port Interfacing Circuit Design PCB Design
Hourly - Expert ($$$) - Est. Time: Less than 1 month, Less than 10 hrs/week - Posted
We have a GPS device unit which has its own firmware, we know how to send and use every command, right now it is sending data to our server and everything is working well. What we need is to create our own firmware, which is to develop the communication protocol and changing the command format that is sent and/or received. Commands can be sent via SMS, GPRS, or connected to a computer through a serial cable. We also would like a documentation or tutorial once the project is done, explaining to us what was the procedure applied in changing the firmware since so that we can duplicate this same process from the one provided. More details will be provided after signing an NDA. Regards.
Skills: Serial Port Interfacing Firmware Engineering Reverse engineering