[Feature Request]: Regulatory gain setting for BLE about firmware HOT 6 CLOSED

I'm not aware of the BLE radios used in Meshtastic devices being even capable of exceeding any ISM region's 2.4GHz max EIRP. Can you point us to some documentation of one that you're concerned about?

from firmware.

Not with a stock antenna, but if you use a high-gain antenna and the limits are in EIRP, the default power level for a radio assuming a dipole is going to be drastically too high without a TX gain reduction at the radio.

from firmware.

Example antenna for what I'm talking about:

https://www.amazon.com/Tupavco-TP512-Wi-Fi-Antenna-2-4GHz/dp/B008Z4DNFC/

from firmware.

Here's one rated at 18dBi:

https://www.amazon.com/TECHTOO-Directional-Connector-Wireless-Extension/dp/B00OCJYPCY/

And another for 23.5dBi:

https://www.amazon.com/Premiertek-Directional-High-Gain-Parabolic-ANT-GRID-24DBI/dp/B005M8KU3W/

from firmware.

This stems from this discussion:

#3932 (reply in thread)

Which would be great, except that in some places where you could install a router/repeater node, they are so far from the ground that they would be outside of normal Bluetooth range when running on a regular dipole antenna. A directional antenna would be great and would drop the RX noise floor so you could talk to it over a longer range, but you'd need to drop the transmit power by a corresponding amount to stay within regulatory limits.

from firmware.

Even the NRF52 at max only makes it to 8db. 99% of folks aren't using high gain antennas with BLE, so I'm not sure there is a compelling reason to parameterize this in the mainline firmware. This seems like a good case for a compile time macro perhaps.

from firmware.