Adidas4275, I read in the manual that HFP should be power with 6-15V...so I thought I should connect it to the 3S (althought I see the board boots ok when powered from the 5V USB)
mspencer, my gain is 25 as recommended by HF manual. Checked with HF Software.
Stacky, I will review my connections maybe I did a mistake. The HF layout for motor connection is not really intuitive
Thanks for the responses!
I'll report later!