Specs

  • ESP8266 in ESP01 format (8 pins) with 1MB flash memory, ceramic antenna

image

Note

Because flash is only 1MB, OTA/Web Update are not possible

Be aware

This ESP01 cannot be used on Bigtreetech boards as it is, a small rework is necessary to bridge VCC pin with CH_PD pin bridge

Pinout

1 2 3 4
GND IO02 IO0 RXD
TXD CH_PD RESET VCC