Download all .part files associated with this project (e.g., .part2.rar , .part3.rar ) into the same folder, then use a tool like WinRAR or 7-Zip to extract them. If you can share:
did you download the file from (a specific site, forum, or GitHub link)? What is the full list of part files you have? esp628.part1.rar
RAR split archive part 1. You will need all subsequent parts (part2, part3, etc.) to extract the file, as it is likely a compressed file for ESP-based hardware (such as Espressif ESP8266 or ESP32 modules). Download all
I can help determine the exact nature of the file and how to use it. RAR split archive part 1
Without the specific source or full set of files, it is impossible to know the exact contents, but it is typically a firmware binary file , a source code project folder , or project documentation for an ESP chip project.