(bootloader) slot-count: not found
(bootloader) slot-suffixes: not found
(bootloader) slot-suffixes: not found
(bootloader) has-slot:recovery: not found
target reported max download size of 536870912 bytes
sending 'recovery' (14572 KB)...
OKAY [  0.463s]
writing 'recovery'...
(bootloader) Image not signed or corrupt
OKAY [  0.502s]
finished. total time: 0.965s