This article describes version 1.6.1 of the firmware for the ThinkRF R55xx family of real-time spectrum analyzers.
This firmware is ThinkRF part number 55-0035, dated 17 April 2019.
This product is distributed as a single binary file, ThinkRF_R55xx_firmware_v1-6-1.img This version of the R55xx firmware is compatible with all ThinkRF R5500 and R5550 products.
Version 1.6.1 is a minor update from version 1.6.0, released 4 April 2019.
Download ThinkRF R55xx Firmware 1.6.1
Download ThinkRF R55xx Release notes
Please refer to here to learn how to upgrade your R5500 firmware.