Lighthouse-tx-htc-2-0-calibration-rescue-244.bin -

The checksum should no longer be all zeros. Three common failure modes after attempting lighthouse-tx-htc-2-0-calibration-rescue-244.bin :

"basestation" : "firmware_version" : "436", "calibration_checksum" : "0x1F7A" lighthouse-tx-htc-2-0-calibration-rescue-244.bin

dfu-util -a 0 -s 0x08000000:leave -D lighthouse-tx-htc-2-0-calibration-rescue-244.bin If using STM32_FlashLoader.exe (older tool): The checksum should no longer be all zeros