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  • I have a BeagleBone Black, an Arduino Duemilanove and a WS2812b LED strip driven with 5 V.

  • I have no level shifters, nor I intend to order one.

  • The Arduino works perfectly with a LED strip, and I need the BeagleBone Black just to send simple commands like 0, 1, 2, 3, 4, 5... to make the Arduino perform one of five modes.

  • The BeagleBone Black's USB port is taken by other device that I need, and I do not intend to use USB splitters.

What is the best way to communicate between the BeagleBone Black and the Arduino in this situation? If I do not want to use level shifter I2C and RS232 TTL communication is impossible?

Is it OK to use for example just one wire (plus ground) and communicate via the analog port using analogWrite() on the BeagleBone Black and analogRead() on the Arduino, and is there some additional advice on communicating this way?

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closed as primarily opinion-based by Mark Booth Jun 5 '17 at 10:50

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ Welcome to Robotics MetNP, but I'm afraid that questions like this are off-topic because there are many ways to solve any given design problem. We prefer practical, answerable questions based on actual problems that you face, so questions which ask for a list of approaches or a subjective recommendation on a method (for how to build something, how to accomplish something, what something is capable of, etc.) are off-topic. Please take a look at How to Ask & tour for more information on how stack exchange works. $\endgroup$ – Mark Booth Jun 5 '17 at 10:50
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It should be possible to make pseudo logic lines over analog between the BBB and the arduino using analog signals. The only real downside is that it will be slower and you have to write more code. Just be sure that you keep in mind the analog pins on the BBB only accept 1.8v so don't put anything beyond that on it.

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BeagleBone black has 6 UART ports - you can connect one of them to the Arduino digital pins and use software serial on the Arduino. See:

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  • $\begingroup$ do I need aditional hw for this like level shifter from BeagleBone's 3.3v to arduino's 5v ? $\endgroup$ – MetNP Jun 7 '17 at 0:10
  • $\begingroup$ @MetNP no problem. I am still using it. $\endgroup$ – acs Jun 7 '17 at 13:22

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