Bluetooth Low Energy Module
Shanghai Ehong Technologies Co., Ltd
6.5. UART
This is a standard UART interface for communicating with other serial devices. The
UART interface provides a simple mechanism for communicating with other serial
devices using the RS232 protocol.
Table 8: Possible UART Settings
Figure 3
：
Connection To Host device
6.6. I2C Master
The module can act as an I2C master when configured by software. Any two PIOs can
be configured as I2C_SCL and I2C_SDA.
6.7. SPI Master
The module can act as an SPI master (mode 0) when configured by software. Any four
PIOs can be configured as SPI_CLK, SPI_CS#, SPI_DIN and SPI_DOUT. The clock
rate of the software SPI is around 470kHz.
Parameter
Possible Values
Baud Rate
Minimum
1200 baud (≤2%Error)
9600 baud (≤1%Error)
Maximum
2M baud (≤1%Error)
Flow Control
RTS/CTS or None
Parity
None, Odd or Even
Number of Stop Bits
1 or 2
Bits per Byte
8
