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2019/07/29 00:35:21 (permalink)


Hi  Everyone .
I  have short time  to  find how  blue tooth  working.And  I know   it used  radio tech  frequency  hopping spread spectrum to transmission /receiver  data. I have some question , i don't understand and  I need someone explain for me.
the first it relate    channel  work.USA used 79 channel in frequency band  ,some where used 23  channel such as  Japan,Spain...... this mean when i make product  for us  i must  use blue tooth  module from maker support frequency band us,when i make product  for japan  i must  use  blue tooth module form maker support frequency band japan.  i don't known  my thinking it is true or false ?.
The second :so how to set channel to transmission/receiver in 79 channel  or 23 channel in module blue tooth from microchip . i used  a blue tooth audio  BM64.
Thank you so much.

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