RF-BM-BG22Ax
Shenzhen RF-star Technology Co., Ltd.
Page 13 of 23
Note: Be careful short-circuit. If you have a multimeter, it is best to check whether the adjacent pins are short-circuited
before powering on, as the short-circuit will easily damage the module.
2.
As shown in Figure 7, the module is connected to the USB-to-TTL tool.
Module Pin
USB-to-TTL Pin
Pin 15 (VCC)
3.3 V
Pin 14 (GND)
GND
Pin 6 (PA03 CTS)
GND
Pin 8 (PA05 TX)
RX
Pin 9 (PA06 RX)
TX
Figure 7. Module Connected to USB-to-TTL Tool
3.
As shown in Figure 8, connect the USB-to-TTL tool to the COM port of the computer, and check the port number of
the computer.
Figure 8. Connect USB-to-TTL Tool to the Computer