# weight-scale spec, "Echo probe": F ends the probe without a reply, then W is answered
@ set grams=1250 stable=true
> 45 68 65 6c 6c 6f
< 02 45 0d 68 65 6c 6c 6f
> 46
> 57
< 02 30 31 2e 32 35 30 0d
