Overview
The RS485 CAN HAT will enables your Pi to communicate with other devices stably in long-distance via RS485/CAN functions.
Features
- Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards
- CAN function, onboard CAN controller MCP2515 via SPI interface, onboard transceiver SN65HVD230
- RS485 function, controlled via UART, half-duplex communication, supports automatic TX/RX control without programming, onboard transceiver SP3485
- Onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit for RS485 transceiving, lightningproof & anti-electrostatic
- Reserved control pins, allows to work with other control boards
- Comes with development resources and manual (examples in wiringPi/python)
Specifications
- Operating voltage: 3.3V
- CAN controller: MCP2515
- CAN transceiver: SN65HVD230
- 485 transceiver: SP3485
- Dimension: 65mm x 30mm
- Mounting hole size: 3.0mm
Pinouts
| PIN | RASPBERRY PI (BCM) | DESCRIPTION |
|---|---|---|
| 3V3 | 3V3 | 3.3V Power |
| GND | GND | Ground |
| SCK | P11 / SCLK | SPI clock input |
| MOSI | P10 / MOSI | SPI data input |
| MISO | P9 / MISO | SPI data output |
| CS | P8 / CE0 | SPI chip selection |
| INT | P25 | Interrupt |
| RXD | P15 / RXD | RS485 UART receive |
| TXD | P14 / TXD | RS485 UART transmit |
| RSE | P4 | RS485 TX/RX control (auto control by default, some soldering is required to enable manual control), high for TX, low for RX |
Dimensions
Development Resources
Wiki : www.waveshare.com/wiki/RS485_CAN_HAT
Recommended
Waveshare also provides an isolated interface converter USB TO RS232/485/TTL for easy testing.