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The table below provides descrip on star ng from the picture’s top right corner and going
clockwise.
PoE Board (B)
This board coverts power delivered over the Ethernet cable (PoE) to provide a power supply for
the Ethernet board (A). The main components of the PoE board (B) are shown on the block
diagram under
.
The PoE board (B) has the following features:
Key Component
Descrip on
ESP32-WROVER-B
This ESP32 module features 64-Mbit PSRAM for flexible extended storage and
GPIO Header 2
Five unpopulated through-hole solder pads to provide access to selected GPIOs
Flow Control
A jumper header with access to the board signals. For details, see
Func on Switch
A DIP switch used to configure the func onality of selected GPIOs of ESP32. Fo
Tx/Rx LEDs
Two LEDs to show the status of UART transmission.
GPIO Header 3
Provides access to some GPIOs of ESP32 that can be used depending on the po
FT2232
The FT2232 chip serves as a mul -protocol USB-to-serial bridge which can be p
USB Port
USB interface. Power supply for the board as well as the communica on interfa
Power Switch
Power On/Off Switch. Toggling toward the Boot bu on powers the board on, to
5V Input
The 5V power supply interface can be more convenient when the board is oper
5V Power On LED
This red LED turns on when power is supplied to the board, either from USB or
DC/DC Converter
Provided DC 5 V to 3.3 V conversion, output current up to 2A.
Board B Connectors
A pair male header pins for moun ng the
IP101GRI (PHY)
The physical layer (PHY) connec on to the Ethernet cable is implemented using
RJ45 Port
Ethernet network data transmission port.
Magne cs Module
The Magne cs are part of the Ethernet specifica on to protect against faults an
Link/Ac vity LEDs
Two LEDs (green and red) that respec vely indicate the “Link” and “Ac vity” sta
BOOT Bu on
Download bu on. Holding down BOOT and then pressing CH_PU ini ates Firm
CH_PU Bu on
Reset bu on.
GPIO Header 1
This header provides six unpopulated through-hole solder pads connected to sp
