CAN Bus OBD-II Vehicle Logger Kit with ESP32 + LED
Build Your Own OBD-II Vehicle Data Logger with ESP32 and CAN Bus
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Turn any OBD-II compliant vehicle into a rolling data lab. This advanced electronics kit lets you build a standalone logger that taps into the Controller Area Network, decodes live engine parameters, and records speed, RPM, fuel level, and coolant temperature to a microSD card with millisecond timestamps. Ideal for automotive diagnostics, performance monitoring, or Smart India Hackathon projects that demand real-world telemetry.
What You'll Build
You'll assemble a compact, plug-and-play device that connects directly to a car's OBD-II diagnostic port. The ESP32 reads CAN frames via MCP2515, displays real-time gauges on the 0.96-inch OLED, and writes structured CSV logs to a microSD card with accurate time from the DS3231 RTC. No laptop, no obd-cable dangling — just a self-contained unit powered from the car's 12V socket, ready to capture data on every drive.
What You'll Learn
- Decode and interpret automotive CAN bus messages with MCP2515 and OBD-II PIDs
- Integrate multiple SPI and I2C peripherals (CAN, OLED, RTC, SD) on a single ESP32
- Implement robust real-time data logging with buffered writes and file management
- Power an embedded system directly from vehicle 12V using regulated DC-DC conversion
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| MCP2515 CAN Module | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| 4.7kΩ Resistors | 5 |
| 100nF Caps | 5 |
| PCB Prototype Board | 2 |
| OBD-II Connector | 1 |
| Enclosure Box | 1 |
| 12V PSU | 1 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Built for advanced learners who have moved beyond blinking LEDs and want a hardcore embedded project. It's perfect for B.Tech ECE and EEE students working on automotive telematics capstones, Smart India Hackathon teams tackling connected vehicle challenges, and IIT/NIT/VIT/BITS clubs prototyping vehicle data loggers. CBSE Class 12 students with prior Arduino/ESP32 experience will also find this a challenging but rewarding step into CAN bus systems.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code on the box to start a session with the AI companion, which has step-by-step guidance for every solder joint and code block. For deeper issues, WhatsApp us directly — a Compoden engineer who has built this exact kit will respond.
Which vehicles are compatible with this logger?
Any car sold in India after 2010 that is OBD-II compliant (BS-IV and later). The kit supports standard CAN bus protocols (11-bit, 500 kbps), which cover most passenger vehicles from Maruti, Hyundai, Tata, Mahindra, and Toyota.
Does the kit include the firmware for the ESP32?
Yes, you get tested Arduino framework code that queries standard PIDs for speed, RPM, fuel level, and coolant temperature. You can modify the code to add custom PIDs, trigger thresholds, or Bluetooth data streaming.
Can I log data from a fleet of vehicles for my engineering project?
Absolutely. The logged CSV files on the SD card are easy to import into MATLAB, Python, or Excel. Many teams use this kit for fleet trials, gathering ECU data for predictive maintenance or fuel efficiency analysis.
MCP2515 reads OBD-II PIDs from vehicle. ESP32 logs speed, RPM, fuel and coolant to SD card.
What's in this kit
- ESP32 Dev Board
- MCP2515 CAN Module
- DS3231 RTC
- MicroSD Module
- 0.96in OLED
- 4.7kΩ Resistors x5
- 100nF Caps x5
- PCB Prototype Board x2
- OBD-II Connector
- Enclosure Box
- 12V PSU
- Soldering Iron
- Solder Wire
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items