psiroki / stucco

Stepper control

Stucco

About the project

Stepper control via Arduino via serial.

An external Bluetooth serial adapter (like the HM-10) can be connected to D12/D2 (RX/TX).

I've used the 28BYJ-48 stepper motor with the ULN2003 driver connected to pins 8 to 11.

Using the controller

You can issue commands to the module. Commands are either terminated by newline or the semicolon (;) character. Some commands accept parameters, these are separated by a space character, currently parameters cannot have space character in them.

Move commands are queued and are their execution is started immediately. You may freeze the execution, so you can enter the commands in advance.

Commands

• status: lists the command queue
• right <amount> [time]/left <amount> [time]: rotate the stepper motor clockwise/counterclockwise by the given amount (either the number of steps, or the angle in degrees with the suffix d added without space, e.g. 360d for a full turn) in the given amount of time given in seconds (or as fast as possible if omitted)
• freeze [exec|comm|none]: sets the freeze mode to one of the three possible modes, or queries the current freeze mode if neither of them are provided
  • exec: the commands will not execute
  • comm: the commands will execute and the board will not listen to any communication until they are finished
  • none: the commands are executing, the communication channels are open (default)
• clear: terminate execution, clear all commands

Applications

Timelapse camera rotation, star tracker motor control.