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Olimex MOD-WIFI-ESP8266-DEV Revision B1 Schematic

Schematic for the Olimex MOD-WIFI-ESP8266-DEV development board, featuring the Espressif ESP8266 Wi-Fi SoC and 16M-bit Winbond flash memory.

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Overview

This schematic provides the hardware design for the Olimex MOD-WIFI-ESP8266-DEV development board, based on the Espressif Systems ESP8266 Wi-Fi SoC. It details the integration of a 16M-bit Winbond W25Q16BVSSIG serial flash, a 26MHz Seiko Epson crystal, and the UEXT connector for peripheral interfacing. Revision B1 notes include hardware improvements such as an added GPIO0 button for bootloader entry, optimized crystal load capacitors for better Wi-Fi performance, and optional pull-up pads for I2C communication on GPIO4.

Use Cases

IoT device prototyping and development
ESP8266 firmware debugging
Hardware reference for Wi-Fi enabled sensor nodes
Integrating wireless connectivity into industrial systems via UEXT

Topics

ESP8266

Olimex

W25Q16BVSSIG

Schematic

Wi-Fi Module

IoT Development

TSX-3225

UEXT

Espressif Systems

Referenced Parts

W25Q16BVSSIG

Winbond

W25Q16BVSSIG 100nF ... U2

ESP8266

Espressif Systems

ESP8266 ... U1

TSX-3225

Seiko Epson

TSX-3225/26MHz/10PPM/7pF/3.2x2.5mm SMD ... Q1

TIT1185AU2

Diptronics

SW-TAKTIT1185AU2 ... SW1

1N5819-S4

Diodes Incorporated

NA(1N5819-S4) ... D1

W25Q16BVSSIG	Winbond	W25Q16BVSSIG 100nF ... U2
ESP8266	Espressif Systems	ESP8266 ... U1
TSX-3225	Seiko Epson	TSX-3225/26MHz/10PPM/7pF/3.2x2.5mm SMD ... Q1
TIT1185AU2	Diptronics	SW-TAKTIT1185AU2 ... SW1
1N5819-S4	Diodes Incorporated	NA(1N5819-S4) ... D1