The download link for rkdevtool v2.69 may not be directly available due to several reasons:
Rockchip tools are proprietary. The official source is often the Rockchip Electronic Wiki or their developer FTP, but these links change frequently. rkdevtool v2.69 download
(.bin) file is selected for your specific chip (e.g., RK3399 vs. RK3566). Seeed Studio Forum Are you looking to flash a specific operating system custom firmware with this tool? The download link for rkdevtool v2