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ESP32-DevKit-Lipo Revision B Schematic

Schematic for Olimex ESP32-DevKit-Lipo development board featuring the ESP32-WROOM-32D module, Li-Po battery charger, and USB-to-UART interface.

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Overview

This technical schematic details the hardware design of the Olimex ESP32-DevKit-Lipo (Revision B). The board is powered by an Espressif ESP32-WROOM-32D-4MB module and integrates a comprehensive power management system. Key components include the Silergy SY8089AAAC step-down regulator for 3.3V power generation, the Shanghai Belling BL4054B-42TPRN for lithium-polymer battery charging, and the WCH CH340T for USB-to-serial communication. The design incorporates a Li-Po battery connector, a micro USB port, and an auto-programming circuit using BC817-40 transistors. It also includes battery voltage sensing circuitry and pin headers compatible with the ESP32-DevKitC layout.

Use Cases

  • Battery-powered IoT application prototyping
  • Portable sensor node development
  • ESP32 hardware integration reference
  • Mobile embedded systems development

Topics

ESP32-WROOM-32D-4MB
Olimex
SY8089AAAC
BL4054B-42TPRN
CH340T
Li-Po charger
schematic
IoT development
WPM2015-3/TR

Referenced Parts

NR3015T2R2M

Taiyo Yuden

L1 2.2uH/1.5A/DCR=72mR/20%/3.00x3.00x1.50mm/CD32(NR3015T2R2M)

ESP32-WROOM-32D-4MB

Espressif Systems

U5 ESP32-WROOM-32D-4MB

IT-1185AU2-160G-G-TR

HRO

RST1 IT-1185AU2-160G-G-TR

1N5819S4

Micro Commercial Co

D5 1N5819S4/SOD123

BL4054B-42TPRN

Shanghai Belling

U1 BL4054B-42TPRN(SOT23-5)

SY8089AAAC

Silergy

U3 SY8089AAAC(SOT23-5)

CH340T

WCH

U2 CH340T(SSOP20W)

WPM2015-3/TR

Will Semiconductor

FET1 WPM2015-3/TR

MISB-SWMM-5B-LF

Multicomp

USB-UART1 MISB-SWMM-5B-LF(USB_MICRO)

BAT54C

Nexperia

D3 BAT54C(SOT23-3)

DW02S

Olimex

BAT1 DW02S

ESP32-DevKit-Lipo Revision B Schematic | Design Resources