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pull down of this pin; for non-sleeping devices, this pin is meaningless;
6.1.3 AUX
The AUX pin indicates the current working status of the device. When the pin is low, the device is busy; when the
pin is high, the device is idle; when the device receives data, the module will pull the AUX pin low after AUX_delaytime,
and the serial port will start outputting Data, used to wake up the external control device, AUX_delaytime is 4ms by
default, which can be changed by the serial port command, and the customer can decide according to the wake-up time of
the main chip;
6.1.4 ACK
ACK pin is used to indicate the status of the last user data transmission, The pin is pulled low before the
transmission is started. After the transmission is successful, the pin is pulled high. Users can judge whether the data is
successfully arrived by the status of the pin. This pin function does not instruct the coordinator to send a broadcast
message(Only works in non-Sleep-End).
6.1.5 UART_BAUD_RESET
UART_BAUD_RESET pin is used to reset the baud rate, The default level is high when the device is powered on.
In any mode, the pin of the module is pulled low for more than 1000ms. The serial port parameters will be restored to the
default 115200 and 8N1.
Function pin
Pin port
LINK
PA4
WAKE
PC4
AUX
PA7
ACK
PE0
UART_BAUD_RESET
PE2
6.2 Wireless remote configuration function
The module supports remote configuration function. The 2-byte wireless configuration ID is identified by A8 8A by
default. Users can modify the remote configuration ID. When the first two bytes of wireless air data received by the
module are wireless configuration ID, the module judges that the data packet is a remote configuration command and
executes the corresponding command operation. The data packet will not be output through the serial port. Remote
configuration of Sleep-end -device needs to wake up first.
