Add BT33 board

[k8188219]

Product Page: https://www.aliexpress.com/item/1005008180809307.html
Spec: nrf52833 + GC1101(PA+LNA)
GC1101 https://www.geochipinc.com/product/SPQDXP/209.html

needs 3.3V for GC1101 so buy module with daughter board is preferred
use picoprobe to flash bootloader

Unlock

./openocd -d2 -f interface/cmsis-dap.cfg -f target/nrf52.cfg -c "init" -c "nrf52_recover"

Flash

./openocd -d2 -f interface/cmsis-dap.cfg -f target/nrf52.cfg \
-c "gdb flash_program enable" \
-c "gdb breakpoint_override hard" \
-c "init" \
-c "reset halt" \
-c "flash write_image erase ./bootloader.hex"

Board Infomation:

VBAT = 3.3V
fem-ctx-gpios = P0.17
fem-crx-gpios = P0.20

Signal strength at 2-3m line of sight

1206.mp4