How to achieve long-distance connection communication？ about nimble-arduino

[h2zero]

Are you saying that with the bluedroid library you get more distance than with NimBLE? I don't know how that could be but please test and confirm so I can look at it. FWIW I get well over 30m with my esp32's at 9dbm.

[Blue186]

Thanks for answering my question，
It should be that my other configuration parameters were not done well. I found that by adjusting the parameters of pClient->updateConnParams();, I can adjust the connection distance, and finally successfully achieved a 100-meter connection.

At the same time, in addition to the updateConnParams function on the client, the server also has it. What configurations should I make on the client and server to achieve a stable and efficient connection between the client and the server? The main ones are connection distance and data delay.

[h2zero]

That makes sense, you should be loose with the timeout for distance, latency also if you're inclined. The min max interval being a factor of 15ms is recommended by Apple but there is no reason to follow that other than connecting with Apple devices that I can fathom. Trial and error here will be required to maximize if that's the goal.