I'm looking to power (and transmit data to and from) the cam from distances greater than 50 ft. How can I best boost the UART/USB/SPI to RS-485 levels? Or is there another better way to go about this?
I've found a few things that may help. Curious as to what anyone thinks in terms of which may work best.
1) USB to RS-485
http://www.robotshop.com/en/devantech-u ... rface.html
2) UART to RS-485
http://www.robotshop.com/en/sfe-uart-to ... erter.html
3) PoE possibly? The original idea for the project was to make the camera PoE-enabled, but to be honest I'm struggling mightily to accomplish this. I've had a few ideas, like using a PoE Network switch and then mounting an ethernet port on the board, but I'm not an experienced prototyper and don't know how I'd do this.
Long distance power & data transmission
- iabdalkader
- Posts: 679
- Joined: Sun May 24, 2015 3:53 pm
Re: Long distance power & data transmission
I think CAN easily works over this distance and at 1 Mbit/s. For PC/host side data you could use a USB to CAN like this:
https://www.seeedstudio.com/USB-CAN-Ana ... -2888.html
https://www.seeedstudio.com/USB-CAN-Ana ... -2888.html
Re: Long distance power & data transmission
Will this take care of transferring power from the computer to the cam as well?
- iabdalkader
- Posts: 679
- Joined: Sun May 24, 2015 3:53 pm
Re: Long distance power & data transmission
No, just CAN high/low and GND you still need to provide power (could hack it to find the 5V) and a transceiver chip or diodes on the cam end. This is similar to your solution, but I think it's more reliable for longer distances and supports many nodes on the same network if you need that.
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