PiCAN3 CAN Bus HAT for Raspberry Pi 4 with SMPS and RTC

Product Description

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The PiCAN3 board with SMPS (Switch Mode Power Supply) provides CAN-Bus capabilities for the Raspberry Pi 4. It uses the Microchip MCP2515 CAN controller with MCP2551 CAN transceiver. Connection is made via DB9 or the onboard 3-way screw terminal.

The Switch Mode Power Supply (SMPS) allows connecting an input voltage range of 6 VDC to 20 VDC suitable for industrial and automotive applications and environments. The SMPS will power the Raspberry Pi plus PICAN3.

There is an easy-to-install SocketCAN driver, and programming can be accomplished in C or Python.

The onboard PCF8523 is a CMOS Real-Time Clock (RTC) and calendar chip optimized for low power consumption. Data is transferred serially via the I²C-bus with a maximum data rate of 1000 kbit/s. Alarm and timer functions are accessible with the opportunity to produce a wake-up signal on an interrupt pin. An offset register allows fine-tuning of the clock. The PCF8523 has a backup battery switch-over circuit, which detects power failures and automatically switches to the battery supply when a power failure occurs.

Features

CAN 2.0B at 1 Mb/s
High speed SPI Interface (10 MHz)
Standard and extended data and remote frames
CAN Bus connection via standard 9-way sub-D connector or screw terminal
Compatible with OBDII cable
Solder bridge to set different configuration for DB9 connector.
Onboard 120 Ohm termination resistor
Serial LCD ready
LED indicator
Four fixing holes, comply with Pi Hat standard.
SocketCAN driver, appears as can0 to application.
Interrupt RX on GPIO25
5VDC@3A SMPS to power Raspberry Pi and accessories from DB9 or screw terminal

Reverse polarity protection
High efficiency switch mode design
6 VDC to 20 VDC input range

RTC with battery backup (battery not included, requires CR1225 cell)

Documentation

Development Resources incl. Sample Code

Note: The programming samples, other than those for the RTC, are identical to those of the PICAN2:

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Attach external electronics through the GPIO port
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Product Videos

BMW E8x K-CAN BUS to GUI development using PiCan3 and Raspberry Pi. 00:44

Development of a GUI for BMW E8x Models CAN BUS interpretation. Taking CAN BUS data in via a PiCAN3 module on my raspberry pi. Then displaying that data on a web gui front end. Eventually I would like to make a CIC retrofit to my car. Still more work to be done but this is a preview. I run the PiCAN3 in loopback mode and then send CAN data into the bus which then is picked up by my python script and interpreted.