lower tx_power to 15 for boards with chip antennas#11132
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Boards identified by mikeysklar. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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I went through all the boards in circuitpython.org that looked like they might have chip antennas based on their pictures (or lack of evidence contrary in their pictures, and tracked down whether they really did. Those boards had their default
tx_powerset to 15 dBm instead of the default 20. A few were already set, and one was already set to 11 dBm, which I left alone.I can't see the pass I did was perfect, but I think I got all or nearly all.
Interesetingly, may of the M5Stack boards use a slot metal antenna which is compact but not a chip antenna. I left those alone.
I have asked @UnexpectedMaker if this value makes sense for his boards, all of which seem to use chip antennas. This PR is draft until then.