1. ആമുഖം
The Waveshare RS485 CAN HAT is designed to enable your Raspberry Pi to communicate with other devices over long distances using RS485 and CAN functions. This HAT is compatible with various Raspberry Pi models, including the 5, 4B, 3B+, 3B, 2B, B+, Zero, Zero W, Zero WH, and Zero 2 W.
2. സവിശേഷതകൾ
- Standard Raspberry Pi 40PIN GPIO extension header, supporting Raspberry Pi series boards.
- CAN function: Onboard CAN controller MCP2515 via SPI interface, with onboard transceiver SIT65HVD230DR.
- RS485 function: Controlled via UART, supporting half-duplex communication and automatic TX/RX control without programming, with onboard transceiver SP3485.
- Onboard 120Ω terminal resistor for RS485 and CAN interfaces, enabled via DIP switch.
- ഓൺബോർഡ് ടിവിഎസ് (ക്ഷണികമായ വോളിയംtage Suppressor) to effectively suppress surge voltagഇ, ക്ഷണികമായ സ്പൈക്ക് വോള്യംtage in the circuit for RS485 transceiving, providing lightning-proof and anti-electrostatic protection.
- Reserved control header, allowing compatibility with other control boards.
3 സ്പെസിഫിക്കേഷനുകൾ
| പരാമീറ്റർ | മൂല്യം |
|---|---|
| ഓപ്പറേറ്റിംഗ് വോളിയംtage | 3.3V |
| CAN കൺട്രോളർ | MCP2515 |
| CAN ട്രാൻസ്സിവർ | SIT65HVD230DR |
| RS485 Transceiver | SP3485 |
| അളവ് | 65 × 30 മിമി |
| മൗണ്ടിംഗ് ഹോൾ വലുപ്പം | 3.0 മി.മീ |
4. സജ്ജീകരണവും ഇൻസ്റ്റാളേഷനും
This section guides you through the physical installation of the RS485 CAN HAT onto your Raspberry Pi. For detailed software configuration and driver installation, please refer to the official online user manual at //bit.ly/3mC64mA.
4.1 ശാരീരിക ബന്ധം
- Align the 40PIN GPIO extension header of the RS485 CAN HAT with the GPIO pins on your Raspberry Pi board.
- Gently press the HAT down onto the Raspberry Pi's GPIO header, ensuring all pins are correctly seated.
- Secure the HAT using the provided RPi screws pack (2pcs) through the mounting holes.
ചിത്രം 1: മുകളിൽ view of the Waveshare RS485 CAN HAT, showing the main components and connectors.
ചിത്രം 2: താഴെ view of the Waveshare RS485 CAN HAT, highlighting the 40PIN GPIO connector.
Figure 3: The RS485 CAN HAT mounted on a Raspberry Pi, illustrating the standard 40PIN GPIO extension header connection.
Figure 4: Close-up of the HAT, showing the CAN controller MCP2515, CAN transceiver SN65HVD230, and RS485 transceiver SP3485.
Figure 5: The onboard Transient Voltage Suppressor (TVS) is highlighted, which protects against surge and spike voltages.
Figure 6: The RS485 CAN HAT fully installed on a Raspberry Pi board.
Figure 7: Dimensions of the RS485 CAN HAT, showing its compact size.
4.2 ഇൻസ്റ്റലേഷൻ വീഡിയോ
Video 1: Installation and basic setup guide for the RS485 CAN HAT on a Raspberry Pi.
Video 2: Demonstration of the RS485 CAN HAT's features and functionality.
5. പ്രവർത്തന നിർദ്ദേശങ്ങൾ
After physical installation, software configuration is required to enable the CAN and RS485 functions. The Waveshare RS485 CAN HAT comes with development resources and a manual, including examples in wiringPi/Python. Please refer to the comprehensive online user manual for detailed programming guides and exampകുറവ്:
- ഓൺലൈൻ ഉപയോക്തൃ മാനുവൽ: //bit.ly/3mC64mA
This manual provides instructions for setting up the SPI interface for the CAN controller and UART for RS485 communication, along with code exampആരംഭിക്കാൻ.
6. പ്രശ്നപരിഹാരം
6.1 ഡാറ്റാ ട്രാൻസ്മിഷൻ പ്രശ്നങ്ങൾ
ചോദ്യം: I cannot send or receive data.
ഉത്തരം:
- Ensure that the baud rates on both communicating devices are identical.
- The fixed frame ID in the routine is set to 0X123. Please configure the sending and receiving CAN ID of the other end of your CAN communication to be 0x123.
6.2 Ubuntu config.txt Configuration
ചോദ്യം: How do I configure the config.txt file when Ubuntu is installed on the Raspberry Pi?
ഉത്തരം:
- For mainstream Ubuntu systems, the config.txt file is typically located in the
/boot/firmwareഫോൾഡർ. - Alternatively, you can use a card reader to access the Raspberry Pi's SD card on a computer (or another host that can recognize the SD card) and modify the config.txt file നേരിട്ട്.
7. പാക്കേജ് ഉള്ളടക്കം
നിങ്ങളുടെ ഉൽപ്പന്ന പാക്കേജിൽ ഇനിപ്പറയുന്ന ഇനങ്ങൾ ഉൾപ്പെടുത്തിയിട്ടുണ്ട്:
- RS485 CAN HAT x1
- RPi screws pack (2pcs) x1
8. അധിക വിവരങ്ങൾ
For easy testing and enhanced functionality, we recommend the isolated interface converter USB TO RS485 Converter (ASIN: B081MB6PN2).
