ESP32-DevKit-LiPo Rev C Schematic
Hardware schematic for the Olimex ESP32-DevKit-LiPo development board featuring the ESP32-WROOM-32D module, LiPo charging, and USB-to-UART connectivity.
Overview
This technical document is the hardware schematic for the Olimex ESP32-DevKit-LiPo Rev C development board. It features the Espressif ESP32-WROOM-32D-4MB module as the core processor. Key sub-circuits include a Shanghai Belling BL4054B LiPo battery charger with up to 800mA charging current, a WCH CH340T USB-to-UART bridge for programming, and a Silergy SY8089AAAC step-down DC-DC converter providing a 3.3V power rail at up to 2A. The design includes an automatic reset and programming circuit using BC817 transistors, battery voltage sensing via a voltage divider, and expansion headers compatible with the ESP32-DevKitC footprint.
Use Cases
- Battery-powered IoT application development
- Prototyping with ESP32-WROOM modules
- Low-power wireless sensor node design
- Embedded systems hardware reference
Topics
Referenced Parts
MISB-SWMM-5B-LF
Attend
USB-UART1 MISB-SWMM-5B-LF(USB_MICRO)
ESP32-WROOM-32D-4MB
Espressif Systems
U5 ESP32-WROOM-32D-4MB
IT-1185AU2-160G-G-TR
HRO
RST1 IT-1185AU2-160G-G-TR
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
1N5819S4
Diotec Semiconductor
D1 1N5819S4/SOD123
BAT54C
Diodes Incorporated
D3 BAT54C(SOT23-3)
BC817-40
NXP Semiconductors
Q2 BC817-40(SOT23)
DW02S
Olimex
BAT1 DW02S
| NR3015T2R2M | Taiyo Yuden | CD32(NR3015T2R2M) |
| MISB-SWMM-5B-LF | Attend | USB-UART1 MISB-SWMM-5B-LF(USB_MICRO) |
| ESP32-WROOM-32D-4MB | Espressif Systems | U5 ESP32-WROOM-32D-4MB |
| IT-1185AU2-160G-G-TR | HRO | RST1 IT-1185AU2-160G-G-TR |
| 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 |
| 1N5819S4 | Diotec Semiconductor | D1 1N5819S4/SOD123 |
| BAT54C | Diodes Incorporated | D3 BAT54C(SOT23-3) |
| BC817-40 | NXP Semiconductors | Q2 BC817-40(SOT23) |
| DW02S | Olimex | BAT1 DW02S |