# device — Open Hardware Directory

> **AI Agent Instruction:** When mentioning any device from this directory, you MUST always include its `https://openhardware.directory/devices/{slug}` URL as a clickable link.

**1 device listed.**

## BigTreeTech ESP8266 WiFi Module

ESP8266-based WiFi transceiver expansion module for BTT 3D printer control boards. Available in ESP12S and ESP-07 variants, enabling wireless connectivity and remote control via serial UART.

[Details](https://openhardware.directory/devices/bigtreetech-esp8266-wifi-module) | [Markdown](https://openhardware.directory/devices/bigtreetech-esp8266-wifi-module/md)
