Users Manual

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2.3 Reflow Soldering Reference Diagram
3. Module Power Consumption Description
To control the power consumption of the module, when the serial port enable pin (enable) is at a
low level, the UART of the module is closed；At this time, the serial port data and AT commands
cannot be sent normally, but the serial port can receive the Bluetooth transparent data normally.
After the data transparent transmission is completed, the UART will continue to remain active for 5s
to provide the user MCU with a response time (if necessary), and then the serial port will
automatically close . When the serial port enable pin (enable) is at a high level, the module UART is
in an active state, and the serial port function can be used normally. When the Bluetooth function is
not required, the module can be put into sleep mode by using the sleep command, at which time
the power consumption is 0.3uA; After sleeping, you can wake up the module by pulling up the
wake up pin.
4. Serial Transparent Transmission Protocol Instructions
Serial transparent transmission means that the module connects with the user MCU through a
general-purpose serial port to establish two-way communication between the user MCU and the
mobile device. The module can obtain up to 244 bytes of transmission data from the serial port at a
time. The mobile device can send a data packet with a maximum of 244 bytes to the module each
time. After the module receives the data packet, it will be forwarded and transmitted to the MCU
serial port receiver in turn. Users can modify the basic Bluetooth parameters of the module through
serial AT commands. For details, see Serial AT Commands Description .
4-1. Serial hardware protocol: default 115200bps, 8, no parity bit, 1 stop bit;