BBGW+RN52 Integration Stuff
Serial Port Stuff
gpio 7 low configures for 9600b instead of 115200b...
gpio 9 low configures cmd mode rather than data mode
can drive 16 ohm speakers/headsets...
also has mic in...
TODO: buy audio jack for headset
pcm via i2s...
TODO: study i2s ...
solder straight male headers to export pins !!!
position antenna away from the board!
test bb's 3.3v quality and capacity
bring 3.3v to both pwr_en and 3.3v pins
cmd vs data mode:
default is data mode
pull gpio 9 low for cmd mode
leave in data mode (gpio 9 NOT shorted to ground)
connect 3.3v line and pwr_en line
open terminal window @ 115200b
enter cmd mode by shorting gpio 9 to ground
result should be "CMD" on terminal
use terminal settings to just CR not CRLF
"D": dump settings