User's Manual

4.1.3 Observer

1. Command AT+ROLE=2 to select the observation mode (valid after restart)

2. After receiving the advertising, print out all the contents of the advertising package through the serial port.

3. The observer device cannot be connected to any device.

Check format below

LEN

MAC

RSSI

Advdata

1 byte

6 byte

1 byte

No more than 31 byte

Note: LEN is the sum of MAC, RSSI, and advertising data length.

1. The scan window and scan gap are consistent with the scan parameters.

2. The AT command is valid during the period.

4.2 Power supply mode

There are low power consumption mode and wake-up mode.

4.2.1 Low power consumption mode

The so-called low power consumption mode means that the BLE function continues to run after the module enters this mode, and

peripherals other than the wake-up pin of the module are turned off. If you need lower power consumption, you can turn off

advertising and scan through AT commands, disconnect all connections, and set a longer advertising gap, scan gap, and connection

gap.

Enter low power consumption:

1. AT command "AT+SLEEP" immediately enters low power consumption mode;

2. AT command "AT+ONSLEEP=1" power on immediately enters low power consumption;

3. Enter low power consumption through the rising edge of pin WKP;

After the module enters the low power consumption mode, it outputs "STA: sleep" through the serial port (LOGMSG does not

turn off the output).

Note: In the low-power mode, the serial port output is valid and cannot be input

4.2.2 Wake-up mode

The so-called wake-up mode means that the peripherals required by the module are in a normal working state in

this mode. After the module wakes up, it outputs the status "STA: wakeup".

Wake-up method:

1. Wake up immediately through the falling edge of WKP pin;

2. The serial port RX pin wakes up. The serial port rx falling edge, and the low level remains at 50us and above,

wake up immediately.

4.3 Data transmission mode

There are data transparent transmission and format transmission.

4.3.1 Data transparent transmission

The so-called data transparent transmission means that the data received by the serial port is sent to the other

device through BLE without any processing, and the data received by BLE is sent through the serial port without

any processing.

"AT+TRANMD" command setting.