Sewing machine and embroidery device

A sewing machine comprising:

• a sewing unit including a sewing machine motor and a needle bar having a lower end to which a needle is attachable, the sewing unit being configured to drive the needle bar with power of the sewing machine motor for forming stitches;
• a single terminal for connecting a foot controller to the sewing machine, the single terminal being configured to, when the foot controller is not connected to the sewing machine, allow connection of an external device to the sewing machine;
• and
• a sewing machine controller configured to control the sewing unit, the sewing machine controller being configured to perform:
• a speed-data receiving operation to receive speed data from the foot controller connected to the sewing machine via the single terminal for controlling a sewing speed;
• a speed-control operation to control the sewing machine motor in accordance with the speed data received in the speed-data receiving operation;
• an input-data receiving operation to receive input data from the external device connected to the sewing machine via the single terminal;
• and
• a data-outputting operation to output output data to the external device via the single terminal.