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1-) How can I modify the tx/rx power to an antenna? If it is possible of course.
A: We can modify the TX power, RX sensitivity is depended on the module design and the antenna design.
And, we used to have two ways to modify the power, one is to modify the power on the NVRAM released in the SDK.
another is to modify the FW directly , we suggest customer to use the first one because you need to update FW frequently if power not matched.
2-) How can I modify the wifi subsystem to select specific antenna (assuming I have multiple directed antennas, like 4 of them towards North, South, East, West) ?
A: As I know now we used to use antenna diversity to do the antenna switch , and normally it is two antennas in our release.
we need a arithmetic to select the best antenna when the product is moving or rotating , if you used four, that makes the selection stay very complicated. and it need the physical antenna control pin to switch the antenna on .