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setting status and enters the network working state.
Indicator:
The adapter has three indicator lights, power indicator (red), main/slave mode indicator (red), and
connection indicator (green).
When the BLE adapter is powered on, the power indicator (red light) will always on.
If the master/slave mode indicator (red light) flashes every few seconds, the adapter is working
properly. The time interval between the flashing lights can be used to determine whether the
device is the master device or the slave device. If it flashes once every 2 seconds, it is the slave
device. If it flashes once every 5seconds, it is the main device.
If the connection indicator (green light) is off, it means that a connection has been established with
other Bluetooth devices. If it flashes once every 1 second, it means no connection has been
established.
When the BLE adapter is working in parameter setting mode, the master/slave mode indicator
light and connection status indicator light extinguished.
Mode switch button:
After power on, BLE adapter is in data mode, master/slave mode indicator light and connection
status indicator light flash, press the switch button of mode, the device enters the parameter setting
state, master/slave mode indicator light and connection status indicator light extinguished, and
output "+OPEN" from the serial port. In the parameter setting state, the serial port parameter
remains 9600bps, 8-n-1. The device stops the network part and turns off the wireless signal. At
this time, only the device parameters can be set.
