// blog

# CAN Bus Infographic: Visual Guide to Signals & Frames

A clear, scannable infographic explaining CAN bus networks, message IDs, frames and error handling for quick learning.

          Updated 14 Aug, 2025

          [← All posts](https://www.autopi.io/blog/)

## CAN Bus Infographics

## Develop with AutoPi: The open automotive platform built-on Raspberry Pi

        Tap into the power of AutoPi's versatile platform and craft innovative solutions in telematics.

          [
        AutoPi TMU CM4
            ](https://www.autopi.io/hardware/autopi-tmu-cm4/)

          [
            Shop
          ](https://shop.autopi.io/)

          [
            ← Back to all posts
          ](https://www.autopi.io/blog/)

// hardware

## Capture data with CAN-FD Pro

Evaluate CAN, CAN FD and J1939 logging. Confirm vehicle access, connectors and signal decoding before deployment.

        [Explore CAN-FD Pro →](https://www.autopi.io/hardware/autopi-canfd-pro/)

###### Hardware

## Choose your evaluation device

Start with the hardware your project needs. Software and connectivity terms differ by device and purchase option. Prices below exclude VAT, duties, shipping and optional accessories.

            CAN-FD Pro
            In stock · ships tomorrow

### Dual CAN-FD data logger

High-throughput raw frame capture on two independent CAN-FD channels. On-device DBC decoding, ASAM MDF4 output, J1939 native support and hardware-encrypted data signing - all on a Raspberry Pi CM4.

→ 2× CAN-FD · >3,000 fps/channel · 5 Mbps

→ 4 GB LPDDR4 · 32 GB eMMC + USB expansion

→ NXP SE051 · Tailscale SSH · Docker · S3 sync

→ 12–35 V DC · J1939 · OBD-II · 4G/LTE + GPS

            From EUR 599. AutoPi software included without a subscription. Cellular SIM and data purchased separately.

          [Order CAN-FD Pro](https://shop.autopi.io/products/autopi-can-fd-pro)
          [Learn more](https://www.autopi.io/hardware/autopi-canfd-pro/)

            Mini
            In stock · ships tomorrow

### Fleet telematics & OBD-II

OBD-II and supported EV telemetry with GPS and built-in 4G/LTE. Check your exact vehicle, required signals and regional variant; installation and configuration needs vary.

→ OBD-II / K-Line · EV parameters · GPS tracking

→ 4G/LTE Cat 1 · BLE · internal antennas

→ −40°C to +85°C · CE/UKCA/E-Mark/RoHS

→ 10–30 V DC · compact · fleet-ready out of box

            EUR 129 + EUR 6/month for SIM and Cloud, with a 12-month minimum. First-year minimum: EUR 201. Includes 100 MB/month.

          [Order Mini](https://shop.autopi.io/products/autopi-mini)
          [Learn more](https://www.autopi.io/hardware/autopi-mini/)

            TMU CM4
            In stock · ships tomorrow

### Edge compute platform

Raspberry Pi CM4-based telematics unit for custom software stacks. Run Docker containers, Python services and CAN-FD logging on the same device - managed remotely via AutoPi Cloud.

→ BCM2711 CM4 · 1 GB LPDDR4 · 8 GB eMMC

→ 2x CAN or CAN-FD variant · Docker · Python · SocketCAN

→ NXP SE051 · Tailscale · WiFi · BT 5.0 · GPS

→ 12–35 V DC · 4G/LTE Cat 4 · IP67 option

            From EUR 235 with the SIM and Cloud subscription option: EUR 6/month, 12-month minimum. Also available without a subscription; select your interface and payment option in the shop for the price.

          [Order TMU CM4](https://shop.autopi.io/products/autopi-telematics-unit-cm4-4g-lte-edition)
          [Learn more](https://www.autopi.io/hardware/autopi-tmu-cm4/)

      [Compare all devices →](https://www.autopi.io/hardware/compare/)

// related

## More posts you'll like

      [
        View all →
      ](https://www.autopi.io/blog/)

          Raspberry Pi

          DIY

#### Build a Raspberry Pi Touchscreen Car Computer (Step-by-Step)

          Assemble a Pi-based carputer with touchscreen, power, mounting and software setup. Parts list, wiring tips and configuration for a reliable in-car sys
          ...

        [
          Learn More →
        ](https://www.autopi.io/blog/build-a-raspberry-pi-touch-screen-car-computer/)

          Guides

#### J1939 Explained (2025): PGNs, SPNs & Heavy-Duty Diagnostics

          Learn J1939 basics‚ PGNs, SPNs, addressing and tools for heavy-duty trucks and machinery. Examples and troubleshooting tips included.

        [
          Learn More →
        ](https://www.autopi.io/blog/j1939-explained/)

          Guides

#### CAN Bus Explained (2025): Frames, Arbitration & Tools

          Understand identifiers, arbitration, error handling and analyzers used in automotive systems. Practical examples and diagrams.

        [
          Learn More →
        ](https://www.autopi.io/blog/can-bus-explained/)

            // contact

## Still have questions?

Get in touch with us - we're ready to answer any and all questions.

// send a message

We aim to reply within one business day.

Or email [sales@autopi.io](mailto:sales@autopi.io).