Try making sure you have a space between the two command line switches
bmp2c-escher3d.exe myimage.bmp myimage.bin -b -c and not -b-c.
I have successfully converted a 1126kb 24 bit bmp file to a 106kb bin. My firmware bin after the binary copy is 224kb. The bmp file needs to have large blocks of colour. Too much detail will not convert successfully.
I presume you are following the instructions on github for the PanelDue firmware.
You are missing defining a pin with M950 for the servo on the the BL Touch. My config.g for a Hypercube reads -
; Z-Probe
M950 S0 C"exp.heater7" ; assign heater7 for bltouch
M558 P9 C"^zprobe.in" H5 F120 T6000 A30 S0.02 ; Set Z probe type to bltouch and the dive height + speeds
G31 P500 X28 Y0 Z0.812 ; set Z probe trigger value, offset and trigger height
M557 X45:300 Y5:295 S40 ; define mesh grid
Have a look here https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_BLTouch
Glad I spotted it! Falling back on my original DOS 2 and 3 experience!
From github -
Version 3.2.11
Upgrade Notes:
This release is compatible with RepRapFirmware 3.2 or later.
Someone that knows more may correct me but I think the last 100% 2.05 compatible version was 1.24 of the PanelDue firmware