try this :
config.g
; Z-Probe
M950 S0 C"exp.8" ; create servo 0 pin 8 for BLTouch
M558 P9 C"zprobe.in+zprobe.mod" F150 H2.5 R0.5 T2000 A10 S0.03 B0 ; set Z probe type to bltouch and the dive height + speeds
G31 P25 X0 Y80 Z1.25 ; Set Z probe trigger value, offset and trigger height
deployprobe.g
M280 P0 S10 ; set 10deg servo position on GPIO port 0
retractprobe.g
M280 P0 S90 ; set 90deg servo position on GPIO port 0
don't use I1 with M280, and use the same port with M280 as define with M950