Description Based on RDA5981xA Module (8Mbit) Module. On Board USB-TTL CH340 USB Debugger. On board one power LED (not necessary because same to module power led). A switch can switch USB port to CH340 debugger or to output of module USB bus interface. Lead out all pins, please see attached image. I2S pins breakout again on bottom, connect via network resistor. Back side SD card interface, tested by default demo code. Back side SO8 SOC IC reserved footprint, support SPI Flash (which don’t have demo code, didn’t test), CS pin on IO5 SPI Interface CS pin IO5 PSRAM tested by default demo code, CS pin IO 23, change by jumper. More functions are not yet tested so far, any feedback please let us know. More documentation please see wiki page.
