If you are using a Moates Ostrich 2.0 or a HULOG device:

Version 5.2 supports real-time AFR logging via a serial wideband controller (Innovate LC-2 or AEM X-Series).

The mechanic then proceeded to download the software from a reputable source and started working on John's car. After a few hours, the mechanic was able to successfully download and install the Honda ECU 3.5 5.2 software, and reprogram the ECU.

A working download of version 5.2 can turn a $50 junkyard P28 ECU into a fully featured race ECU. For a budget J-series swap in an Accord or a turbo D-series project, this software is unbeatable.