use esp32 as the mcu for 3D printer motherboard.
 
it has  larger memory and more powerful than normal 32bit 3D printer motherboard.
 
the file upload speed to sd card is also higher than it as a wifi module, it can support more motor drivers with one fast expand GPIO chip.
 
Specifications  
Two 32-bit MCU ,240MHz
520 KBytes SRAM 
4M Bytes Flash memory
there are 24 more GPIOs(only as output) with a expander, the expanded GPIO speed is 70kHz
WiFi |  802.11 b/g/n/d/e/i/k/r (802.11n up to 150 Mbps)
Bluetooth | Bluetooth v4.2
support 8 Motor drivers
3 heaters
support 3 thermistors (can only read temperature above 30°)
BLtouch/ support wild range voltage 5V~36V Inductive sensor NPN.
LCD128*64/PandaTouchScreen/DGUS touch screen(XH2.54 or RJ11)
Support mixed use of 5V/24V fans,3 of them are controllabe fans
Play music at boot, Error/alarm music..
Real-time operating systems (RTOS)
Control printer, upload files with web browser
Beside Marlin,it can run Grbl CNC firmware too.
More details
test video
 
package list:
  1 PandaZHU board 
  Inner packaging clinker box
  1 cute Panda toy
  Drive module optional TMC2209(two tree)
 
Shipping time: 
Express(DHL/FEDEX/TNT)--about 1 week,
Post -- about 2 weeks