Board extension module Bigtreetech Writer v1.0 — ESP-01S Wi‑Fi adapter for SKR v1.4 / SKR v1.4 Turbo

The Bigtreetech Writer v1.0 is a compact board extension module that allows installation of an ESP-01S Wi‑Fi module to add wireless connectivity to SKR v1.4 and SKR v1.4 Turbo 3D printer mainboards. Designed to interface directly with the host board, it provides the required signals and physical connection for the ESP‑01S so users can enable network access for firmware updates, remote control, and monitoring without modifying the mainboard layout.

Advantages

This extension module offers a small footprint and straightforward mechanical and electrical compatibility with SKR v1.4 and SKR v1.4 Turbo systems. It simplifies the process of integrating an ESP‑01S Wi‑Fi module by providing a dedicated socket and the necessary signal routing, which reduces the risk of wiring errors. The board supports common use cases such as over‑the‑air firmware flashing and basic network communications while keeping the original mainboard form factor intact.

Suitable for

• Adding Wi‑Fi connectivity to SKR v1.4 and SKR v1.4 Turbo based 3D printers
• Enabling remote printer monitoring and control via an ESP‑01S module
• Facilitating wireless firmware updates or OTA flashing workflows

Key specifications

• Form factor: compact extension module designed for direct connection to compatible SKR mainboards
• Compatible module: ESP‑01S Wi‑Fi module socket
• Interface: signal lines and power routing required for ESP‑01S operation with SKR v1.4 / SKR v1.4 Turbo
• Mounting: board-to-board connection that preserves mainboard layout and mounting points

How to use

Install the ESP‑01S module into the header on the Writer v1.0 board, then attach the Writer module to the SKR v1.4 or SKR v1.4 Turbo mainboard using the designated connector and alignment pins. Ensure correct orientation of the ESP‑01S when seating it in the socket. After physical installation, configure the mainboard firmware and serial/network settings as required to recognize and communicate with the ESP‑01S. Follow the mainboard and Wi‑Fi module documentation for appropriate jumpers or firmware options to enable network features.

Usage recommendations

Use a stable 3.3 V supply and verify signal levels before connecting the ESP‑01S. When performing firmware updates or OTA flashing, confirm network credentials and backup existing configurations. If you encounter communication issues, check wiring, module seating, and firmware serial port settings on the SKR mainboard.