This an application-level module, which implements a motion & robotic control and it is totally customizable with different length. Packed with Stepper motor, Mega328 microprocessor, RS485 serial bus, 1515 framework. It realized a linear motion control, you can program the stepper motor to move a certain length with high precision. This type of module can be applied to 3D print, linear push and etc.
How we control this item isn’t clear. No information with this.
No information about the board inside. No information on how to connect to a rs485 port, etc.....