This BT RN4871 board as a footprint size error, so the SOLUTIOn is to machine it again.
# BLE
Has you can see, I use same jumpers to connect to the FTDI because the board as the TX RX issue (they need to be exchanged) in order for the computer to comunicate properly with th RN4871 chip:

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@@ -438,6 +438,16 @@ didn't work!!!
Reading and reading the references listed downward. Debuging again... I think the possibility his the VCC is not well soldered.
- Neil lesson: http://academy.cba.mit.edu/classes/networking_communications/
- Last minute engineers: https://lastminuteengineers.com/
-[**ARDUINO** $I^2C$_ Tutorial, from how to mechatronics](https://howtomechatronics.com/tutorials/arduino/how-i2c-communication-works-and-how-to-use-it-with-arduino/)
-[**ARDUINO** $I^2C$_ Tutorial, from how to mechatronics](https://howtomechatronics.com/tutorials/arduino/how-i2c-communication-works-and-how-to-use-it-with-arduino/)