ESP32-S3 RS485 CAN Board

The ESP32-S3 RS485 CAN Board combines a powerful ESP32-S3 microcontroller with integrated support for RS485 and CAN bus communication. This makes the module particularly suitable for applications in industrial automation, building management systems, and projects requiring robust fieldbus systems. The ESP32-S3 offers dual-core computing power, 2.4 GHz Wi-Fi, and Bluetooth 5 (LE), enabling seamless integration of traditional fieldbuses into modern IoT systems. The module can be easily programmed and powered via the USB-C port. Additionally, numerous GPIOs and common interfaces like I²C, UART, and SPI are available, making the board flexible for use in projects. The compact format with suitable mounting for DIN rails facilitates installation in control cabinets and existing systems. The supplied cables and screwdriver support immediate start.

Features:

• The ESP32-S3 microcontroller offers dual-core computing power, Wi-Fi, and Bluetooth 5 (LE).
• The board integrates RS485 and CAN interfaces for industrial applications.
• It is suitable for direct DIN rail mounting.
• Power supply and programming are done via USB-C.
• Multiple GPIOs and interfaces allow flexible expansions.
• The compact design facilitates integration into control and IoT projects.
• The supplied cables and screwdriver enable immediate use.
• Programming is possible with Arduino IDE, ESP-IDF, and MicroPython.

Application Examples:

• For developers wanting to create IoT systems with RS485 or CAN bus connectivity.
• Integration into industrial controls with DIN rail mounting.
• Use in smart home projects with RS485 sensors or CAN actuators.
• Prototyping of devices combining traditional fieldbuses with modern Wi-Fi or Bluetooth connectivity.

Board Overview:

1. ESP32-S3 up to 240 MHz, with 2.4 GHz Wi-Fi and BLE
2. DC-DC power module, up to 3.3 V 2 A output
3. Pin header for expansions
4. Screw terminal for DC 7–36 V input
5. USB-C port for power, firmware, and communication
6. RTC battery header (SH1.0)
7. Onboard ceramic antenna
8. IPEX1 connector for external antenna
9. 16 MB flash
10. Digital isolation against interference
11. CAN transceiver chip
12. LED indicators (Power, RS485, CAN)
13. ESP32 Boot button
14. ESP32 Reset button
15. Voltage isolation for the buses
16. RS485 matching resistor (120R, activatable via jumper)
17. CAN matching resistor (120R, activatable via jumper)
18. RS485 & CAN terminal block
19. PCF85063 RTC chip
20. DC-DC power chip
21. ME6217C33M5G low dropout regulator
22. RS485 transceiver chip
23. TVS diode for voltage spikes

Documentation:

• Waveshare Wiki

Technical Data:

• Manufacturer: Waveshare
• Manufacturer SKU: 32154
• Microcontroller: ESP32-S3, Dual-Core Xtensa LX7, 2.4 GHz Wi-Fi, Bluetooth 5 (LE)
• Memory: 16 MB Flash
• Interfaces: RS485, CAN, USB-C, GPIO, UART, I²C, SPI
• Power Supply: DC 7–36 V or 5 V via USB-C
• Compatibility: Arduino IDE, ESP-IDF, MicroPython
• Dimensions: 87 × 24 × 59 mm
• Weight: 72 g

Package Contents:

• 1x ESP32-S3 RS485 CAN Board
• 1x cable (4-pin JST to 4 individual Dupont Female)
• 1x small flathead screwdriver