Serial Port Interfacing Jobs

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Hourly - Intermediate ($$) - Est. Time: Less than 1 week, 10-30 hrs/week - Posted
GOAL: Plug in a Raspberry Pi to a plotter using a USB-to-RS232 serial adapter to plot PLT files. You can connect to the RPi command line via SSH (I can also set up VNC access if required). I would like a little python script to be built to take data from a PLT file, and send it to the plotter to get plotted. The plotter is not connected currently to the RPi, however the USB-to-RS232 is - you can access the port to build the script. Once you're ready to test, I'll transport the RPi to the plotter location and run your script. Someone who understands serial communications is essential.
Skills: Serial Port Interfacing Python Raspberry Pi
Fixed-Price - Intermediate ($$) - Est. Budget: $100 - Posted
Enopte has developed an Energy Management System ( refer www.auzimax.com ) and is seeking a reliable and qualified Raspberry PI / Linux developer to join the team. The first project includes: RS485 (proprietry protocol) -> RS485 Modbus RTU protocol converter for solar inverter. You will be provided a detailed specification. I look forward to your application. Regards, Mark
Skills: Serial Port Interfacing Embedded Linux Raspberry Pi
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