https://www.electrodragon.com/product/esp32-can-rs-485-wire-interface-shield/

Main functions:

Used ESP32-DevKitC Pins

UART2 (CAN UART)

  • IO23 = CAN0_TX
  • IO22 = CAN0_RX

UART1 (RS485)

  • IO17 = TXD1
  • IO16 = RXD1

UART0 (default used by USB-TTL bridge chip)

  • TXD0 = TXD0
  • RXD0 = RXD0

MISC

  • IO33 = Power_ADC
  • IO5 = LED

General load switching

  • please note one chip is not soldering default in case you don't need two to save cost
  • try IO12 or IO19
  • VBAT pin up to 36V, and OUTA or OUTB will be on/off when you digitalWrite it high or low
    • IO12 = CTRL1
    • IO19 = CTRL2
    • IO13 = STATUS1
    • IO18 = STATUS2
L_assigned left right R_assigned
  en 23 TXD2 (can)
  36 22 RXD2 (can)
  39 TXD0 TXD0 (USB)
  34 RXD0 RXD0 (USB)
  35 21  
  32 gnd  
Power_ADC 33 19 CTRL2
  25 18 STATUS2
  26 5 LED (prog)
  27 17 TXD1 (485)
  14 16 RXD1 (485)
CTRL1 12 4  
  gnd 0  
STATUS1 13 2  
  9 15  
  10 8  
  11 7  
  +5V 6  

Schematic of peripherals

Dimension and pin definitions

  • Red pins for power supply
  • blue pins for serial interfaces
  • green pins IO22/IO23 for CAN BUS

  • the rest green pins and orange pins for power switch controls

  • back side selector for UART-0-main or UART1-alternative

removing tips

  • use a small driver to leverage in the between carefully

demo

  • function test method: https://www.youtube.com/shorts/vkFrkTkw5Ak

  • demo code look into our arduino-dat - git-dat

  • https://www.youtube.com/shorts/TeaZ1xKcAqg

  • tested work with DPR1103-dat

ref

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