E4 V1.0 Board Based on ESP32 & TMC2209 Minimal 3D Printer

Features:
Compact size: 90mm x 67mm. E4 V1.0 board, based on ESP32 TMC2209.
4 * TMC2209 stepper drives: X, Y, Z and E axis. Onboard TF card socket.
Combined with 3d printing control and WiFi service in one controller board for 3D printing, which also supports CNC.
Support group connection function, one mobile phone can easily control multiple printers, the firmware is under debugging.
There are two versions of the E4 board. One is that the antenna of the WiFi module is onboard. And the other is a WiFi module with an external antenna. This option give you the choice that if you want to install board in a closed box, the external antenna can avoid the problem of WIFI signal weakening in a confined space.