Sounds like the same issue with my BKOOL smart pro 2 trainer. Resistance doesn’t change its unusable in fact. I’ve tried laptops and iPads. Undated all sorftware. Turned ERG on and off used BKOOL app and zwift app. Device is shown connected. and in the BKOOL app I can see myself pedalling but the watts isn’t not changing. Keeps on zero. Checked weight and tyres all fine. BKOOL customer service have just stated the obvious which took 3 weeks for them to reply. Machine still not working. It used to work, then didn’t use it for 4 months. Any ideas, and can it be fixed