epd2in13b_v4 ZJYE213S08R0G01 2.13 inches e-paper display. Screen resolution 122x250 pix Pinout e-Paper Raspberry Pi ESP32 (30 pins) 3.3v 1 3.3v GND 20 GND SCL (CLK or SCK) 23 18 SDA (DIN or MOSI) 19 23 RES (RST) 11 16 DC 22 17 CS 24 5 Busy 18 4 Links waveshare specification waveshare repo