Firmware Version 2.0

J1939 Monitor & Logger

A compact standalone SAE J1939 monitor and logger for engineers and developers. Monitor live SPNs, use the built-in J1939 database, record timestamped traffic to a microSD card and inject messages without connecting a PC.

View User Interface Downloads Buy on eBay

✔ USB-C Powered (5 V)
✔ microSD Logging (32 GB max)
✔ SAE J1939
✔ Standard & Extended CAN IDs
✔ J1939 Database
✔ Message Injection
✔ Battery-backed RTC
✔ Firmware Updates via microSD

Designed and developed in the UK.

User Interface

The J1939 Monitor & Logger is designed for fast operation using a rotary encoder and 128×64 OLED display.

Status Screen

Displays the CAN baud rate, SD card status, logging status, active filter configuration and firmware version.

Technical Specifications

Hardware

SAE J1939
USB‑C Power (5 V)
microSD (32 GB max)
128×64 OLED
Rotary Encoder
Battery-backed RTC

Firmware

CSV Logging
Message Injection
J1939 Database
Firmware Updates via microSD
Timestamped Logging