Discovery of the BG6LH Bluetooth Digital Adapter board for the Yaesu FT-81x radios lead me to build one of my own. The boards were sourced from JLCPCB company based on the provided Gerber files in the github repository.
I modified the population of the board slightly, since my FT-817 was already modified to only power the ACC Pin 1 (+13.8v) when the radio is ON. This was greatly preferred to eliminate the transistors Q1 and Q2, and freed up the PTT pin.
I also brought out ACC Pin 2 (TX GND) to a flying lead so the radio could key my external amplifier.
The final product is excellent, however the driver can be a bit twitchy. Make sure to connect to the Bluetooth module first, before trying to access it with Android software, or the Android device will just use its internal speaker.AT-NAMAFT-187-AUDIO
I also renamed the Bluetooth SSID to FT-817-Audio per this Instructable.
AT+NAMAFT-817-Audio
