We used a quite fancy digital oscilloscope in reverse engineering laboratory. Outside lab, I should find better way to recover my poor learning skills. Honestly, I am not a hardware guy, thus there were always tons of trial errors whenever playing with Beagle Bone. Fortunately, now I found out how to connect USB to TTL serial cable and how to display frequency on the alternative oscilloscope.
Make stable connections with BBB
Fist thing first, we need to connect BBB to PC with regular USB cable. There is a trick. When BBB is connected to PC, 4 blue LEDs will be blinking simultaneously. As soon as it stops blinking, make USB to TTL cable plugged into serial debug slot. First slot is GND, fourth is TX and firth is RX. Safe option is to push reset button in any unusual cases.
Base terminal application
I have been using the Screen for Raspberry Pi but Minicom is much better for BBB since it can modify some communication options like hardware flow control.
Just make same configuration on Minicom by using minicom -s option then save setup as dfl. Serial device location can be found inside dmesg.
I should have followed the wise saying: “There are two types of people. Those who backup and those who have yet to lose everything to a system crash.”
I wrote some takeaways from current learning practices on this tidy little space. Website was running on VM ESXi for few months without issue; however, an error has occurred while migrating and installing the hypervisors. Thought I made full disk back up, but I did not notice that file contains some errors. So, now I am in the middle of recovering my previous records.
There are always chances to get someone else’s unencrypted traffic especially in local network. We might use ARP-spoof, poisoning, gateway attack whatever, but Scapy is the one of great toot to check network environment.