The BeagleBone Black is great. You plug in the USB cable to your computer and a DHCP connection is established, allowing you to ssh to the BeagleBone in seconds. Unfortunately the Raspberry Pi takes a bit more, and I am in the process of setting it up. I was able to download the raspbian.img to an SD card using my BeagleBone Black using the dd command through the terminal.
Now I have an SD card that should allow the Raspberry Pi to boot into linux, but I have no HDMI cable or monitor, or keyboard to do this.
As I understand it is possible to reach the Raspberry Pi's command line through serial communication. See here. Typically people are doing this using a USB cable with an FTDI USB-Serial chip embedded in it (sold by Adafruit and others).
Is it possible to connect from the BeagleBone Black to the Raspberry Pi's command line through serial communication (such that I can connect to my BeagleBone Black via ssh from my laptop, and then connect to the Raspberry Pi through serial from the BeagleBone Black)?
As I understand there are only 3 pins required - TxD, RxD, and GND.
Unfortunately I see that the Raspberry Pi uses 3.3V logic, and as I understand the BeagleBone Black uses 5V. This means some sort of level shifter circuit should be used.
With the level shifter circuit in place, would it then be straightforward to establish a serial communication between these two boards?
Or should I go with ethernet to connect them and look into setting up DHCP for communication?