Difference between revisions of "ESP32-I2C-HUB"

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=== Right GVS connector ===
 
=== Right GVS connector ===
 +
 +
* Gnd/3.3V/Signal
  
 
# P23/MOSI
 
# P23/MOSI

Revision as of 16:08, 12 January 2020

P1060894-crop-720px.jpg

Feature

  • ESP32 breakout board
    • Requires specific version of ESP32 board
  • GVS (Ground, Voltage, Signal) for all ESP32 pins
  • 4-channel I2C Hub
    • TCA9544 - 4-Channel I2C and SMBus Multiplexer With Interrupt Logic
    • Isolated I2C channels
    • Interrupt for each I2C channel
    • I2C Channels can be independently powered with 3.3V or 5V
    • Jumper selectable I2C base address
  • GVS (Ground, Voltage, Signal) for all ESP32 pins
  • FTDI header
  • SPI bus header
  • 5V power source selection/distribution
    • 5V sources - USB, 5mm terminal block, DC jack
  • On-board 3.3V power regulator (doesn't stress the ESP32 regulator)
  • 95x95mm ODAS form factor
  • 6-32 mounting holes

ESP-32 Module

ESP32-720px.jpg

ESP32-Pinout.jpg

Esp32-pinout-chip-ESP-WROOM-32.png

Schematic

Connectors

Rev 3 CAD 2 1.PNG

H1 - 3.3V from on-board regulator Header

  • Install jumper

H1 PWR 3v3.png

  • Alternate for 3.3V power is to install S to V jumper at 3.3V header position (bottom right)
    • H1 should not be installed for that case

PWR 3v3 2.png

H2 - 5V SRC Header

  • 2x3 header
  • Care must be taken to install the correct jumpers
  • USB jumper sends out 5V when a USB cable is connected to the ESP32 module
  • USB jumper sends 5V into the ESP32 module when there is no USB cable connected to the ESP32 module

Power from USB on ESP32 module

H2 USB.png

  • Do not install FTDI jumper
  • Do not install DCJ jumper
  • Install USB jumper

Power from 5V jack

H2 DCJ.png

  • Do not install FTDI jumper
  • Install DCJ jumper
  • Install USB jumper

Power from FTDI

H2 FTDI.png

  • Unstall FTDI jumper
  • Do not install DCJ jumper
  • Install USB jumper

J2 - FTDI

FTDI conn.PNG

J3 - I2C Mux Base Address Select Jumpers

  • A0-A2
    • Install for 0
    • Remove for 1

J3 A0-2.png

J7 - I2C Interface

  • Also goes to the I2C Hub chip
  1. INT* (GPIO5)
  2. SCL
  3. SDA
  4. VCC
  5. GND

J4, J5, J6, J8 - I2C Power Select (Ports #0-#3)

  • Selects 3.3V or 5V on I2C
  • 1-2 = 3.3V
  • 2-3 = 5V

J9, J10, J11, J12 - I2C interfaces #0-#3

  1. GND
  2. VCC
  3. SDA
  4. SCL
  5. INT*

P1 - 5V Power

  • 2x8 pin header

P1 5V Power.png

P8 - SPIbus connector

  1. MISO
  2. 3.3V
  3. SCK
  4. MOSI
  5. n/c
  6. GND

Left GVS connector

  • Gnd/3.3V/Signal
  1. EN (Pull low to shut off 3.3V reg)
  2. VP/P36
  3. VN/P39
  4. P34/P34
  5. P35/A7
  6. P32/A4
  7. P33/A5
  8. P25/A8
  9. P26/A9
  10. P27/SCL
  11. P14/SD_CLK
  12. P12/SD_D2
  13. P13/SD_D3
  14. VUSB

Right GVS connector

  • Gnd/3.3V/Signal
  1. P23/MOSI
  2. SCL/RTS1
  3. P1/TX
  4. I3/RX
  5. P21/SDA
  6. P19/CTS0
  7. P18/SCK
  8. P5
  9. P17/TX2
  10. P16/RX2
  11. P4/SD_D1
  12. P2/SD_D0
  13. P15/SD_CMD
  14. 3.3V

Software Support

Assembly Sheet