Single Board Computer and RS232

I am working on a project where I need to receive data from a device using RS232. Right now I am using a Raspberry Pi and an FTDI RS232 to USB cable.

https://www.adafruit.com/product/70

I would like to find a cheaper alternative and ideally supports RS232 natively. I would like to eliminate the need for the USB adapter. Are there any single board computers with pins that can handle RS232?

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shabaz over 6 years ago +2

HI Kirk, thecaptain0220 wrote: Right now I am using a Raspberry Pi and an FTDI RS232 to USB cable. The FTDI item you've linked to does not provide RS232, it provides 3.3V or 5V-compilant levels (sometimes…
gdstew over 6 years ago +1

I don't know of any SBCs that directly support RS232 signal levels however there are many small inexpensive RS232 level conversion boards that use a single chip to convert the serial I/O from the SBC pins…
thecaptain0220 over 6 years ago in reply to shabaz +1

I have done some research, but I will admit that I am not an expert on the subject. I am using the cable in the link to receive serial data from the device. I connect the RX, TX, and Ground. The cable…

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clem57 over 6 years ago

If the raspberry pi works, why not use the GPIO pins? RS-232 Connections That WORK! - Connecting Devices or Converters - B&B Electronics explains the details how the interface works. But you can use the UART on Pi looking at https://www.raspberrypi.org/documentation/configuration/uart.md . But beware of the conditions at the bottom. If you want a more turn key answer take a look at https://www.sparkfun.com/tutorials/215 . Amazon has this forhttps://www.amazon.com/RS232-converter-board-Female-3-3V/dp/B005D5T292 for example. May save a few dollars, but is it worth the troubles? thecaptain0220 only you can decide for yourself.

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clem57 over 6 years ago

If the raspberry pi works, why not use the GPIO pins? RS-232 Connections That WORK! - Connecting Devices or Converters - B&B Electronics explains the details how the interface works. But you can use the UART on Pi looking at https://www.raspberrypi.org/documentation/configuration/uart.md . But beware of the conditions at the bottom. If you want a more turn key answer take a look at https://www.sparkfun.com/tutorials/215 . Amazon has this forhttps://www.amazon.com/RS232-converter-board-Female-3-3V/dp/B005D5T292 for example. May save a few dollars, but is it worth the troubles? thecaptain0220 only you can decide for yourself.

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