PiBot Wiki

• Avoid using SD cards with excessively large capacity or high speed, as the ESP32 library may not support them. We conducted tests using a Class 4 TF card.

• https://wiki.pibot.com/doku.php?id=pibot_cnc_laser_series:v496_pro:docs:xyyzab

• Of course, a 24V probe can be used. Please refer to the pin map. You can set the probe to a port that includes SWVCC (position 2 in the diagram as the input) and select SWVCC at 24V as your working voltage (position 7).
• https://wiki.pibot.com/doku.php?id=pibot_cnc_laser_series:v496_pro:v49pro_diagram_overview:start

• the new version of the expander 4.1 . I added two voltage-dividing resistors. Please check if the silkscreen on the back is marked as 4.1 (the front silkscreen is incorrect).

If you want to use these ports as regular switches, please connect +5V and the signal. Due to the presence of a voltage divider, there will be a 3V voltage at the STM32 port. You can configure it for high-level triggering.

• https://www.youtube.com/watch?v=oF6c_Z9NqZs

• You can use a closed-loop driver, but it can only receive EN, DIR, CLK, and GND signals, with no feedback information sent back to the mainboard. The mainboard only has outputs and lacks input capabilities.