Ok folks, today I ran out and bought another HRM strap, those Chinese made one, Magene. Came back and try it and without me knowing it, my laptop connect to my router at 5ghz channel. It worked !!! Upon realizing it, I tried my other HRM and it works too!! I havent start training yet ,only connect the HRM to my laptop (windows 10). It has been reading consistently and compared to my watch, it measure around the same heart rate +/- 3bpm.
So for those of you that have dual channel router, try connecting it to 5ghz instead of 2.4ghz. I will report back once I’m done training today and see if it can maintain the reading without dropouts. For those that is looking to train, appreciate if you could try this and report back the findings.
Good luck