ESP32-EVB Evaluation Board Hardware Design Rev D
Hardware design for an ESP32-based evaluation board featuring 10/100 Ethernet, CAN bus, IR transceiver, LiPo charging, and dual relays.
Overview
This design document specifies the hardware architecture for the Olimex ESP32-EVB, an evaluation board built around the Espressif ESP-WROOM-32 module. Key integrated features include a 10/100 Ethernet interface powered by the Microchip LAN8710A-EZC PHY, a CAN bus interface using the MCP2551-I/SN transceiver, and an infrared communication subsystem with an RPM7236-H8 receiver and IR333-A transmitter. The power management section includes a Silergy SY8089AAAC step-down converter and a Microchip MCP73833 LiPo battery charger with status LEDs. The board also incorporates two RAS-0515 relays for power switching, a MicroSD card slot, and a WCH CH340T USB-to-UART bridge for programming and debugging. Extension headers provide access to GPIOs and bootstrapping settings.
Use Cases
- Industrial IoT gateways with Ethernet and CAN connectivity
- Home automation systems utilizing dual relay control
- Battery-powered remote monitoring stations with LiPo management
- Prototyping Wi-Fi/Bluetooth to Ethernet bridges
- IR-controlled smart home devices
Topics
Referenced Parts
Nexperia
Q1 BC817-40(SOT23) ... Q2 BC817-40(SOT23) ... Q4 BC817-40(SOT23) ... Q5 BC817-40(SOT23) ... Q7 BC817-40(SOT23)
ESP-WROOM-32
Espressif Systems
U3 ESP-WROOM-32
MCP73833
Microchip
U1 MCP73833(MSOP10)
BAT54C
Nexperia
U9 BAT54C(SOT23-3) ... U10 BAT54C(SOT23-3)
SY8089AAAC
Silergy
U2 SY8089AAAC(SOT23-5)
CH340T
WCH
U5 CH340T(SSOP20W)
1N5819S4
Diodes Incorporated
D1 1N5819S4(SOD-123) ... D3 1N5819S4(SOD-123) ... D5 1N5819S4(SOD-123)
SS34
Diodes Incorporated
D4 1N5822/SS34/SMA ... D6 1N5822/SS34/SMA
WPM2015-3/TR
Willsemi
FET1 WPM2015-3/TR ... FET2 WPM2015-3/TR
MISB-SWMM-5B-LF
Olimex
USB-UART1 MISB-SWMM-5B-LF(USB_MICRO)
TFC-WXCP11-08-LF
TFC
MICRO_SD1 TFC-WXCP11-08-LF
| LAN8710A-EZC | Microchip | U4 LAN8710A-EZC(QFN32) |
| MCP2551-I/SN | Microchip | U6 MCP2551-I/SN(SOIC-8_150mil) |
| BD5230G-TR | Rohm | U8 BD5230G-TR(SSOP5/SOT-23-5) |
| RPM7236-H8 | Rohm | U7 RPM7236-H8 |
| SMBJ6.0A | Bourns | D2 SMBJ6.0A(DO-214AA) |
| IR333-A | Everlight | LED3 LED/IR333-A/5mm |
| LPJ4013EDNL | Link-Pp | LAN1 RJLD-060TC1(LPJ4013EDNL) |
| MCP2562-E/SN | Microchip | Options were added for MCP2562-E/SN and SN65HVD230D usage! |
| SN65HVD230D | Texas Instruments | Options were added for MCP2562-E/SN and SN65HVD230D usage! |
| BC817-40 | Nexperia | Q1 BC817-40(SOT23) ... Q2 BC817-40(SOT23) ... Q4 BC817-40(SOT23) ... Q5 BC817-40(SOT23) ... Q7 BC817-40(SOT23) |
| ESP-WROOM-32 | Espressif Systems | U3 ESP-WROOM-32 |
| MCP73833 | Microchip | U1 MCP73833(MSOP10) |
| BAT54C | Nexperia | U9 BAT54C(SOT23-3) ... U10 BAT54C(SOT23-3) |
| SY8089AAAC | Silergy | U2 SY8089AAAC(SOT23-5) |
| CH340T | WCH | U5 CH340T(SSOP20W) |
| 1N5819S4 | Diodes Incorporated | D1 1N5819S4(SOD-123) ... D3 1N5819S4(SOD-123) ... D5 1N5819S4(SOD-123) |
| SS34 | Diodes Incorporated | D4 1N5822/SS34/SMA ... D6 1N5822/SS34/SMA |
| WPM2015-3/TR | Willsemi | FET1 WPM2015-3/TR ... FET2 WPM2015-3/TR |
| MISB-SWMM-5B-LF | Olimex | USB-UART1 MISB-SWMM-5B-LF(USB_MICRO) |
| TFC-WXCP11-08-LF | TFC | MICRO_SD1 TFC-WXCP11-08-LF |