User's Manual

1.3.2 BYPASS mode
The BT is capable of transmitting to the Remote device DATA generated in the HOST
by being connected with Remote device. This state is called the BYPASS mode.
In the BYPASS mode, it is not possible to change the settings of the the BT
device or perform a specific operation.
1.4. Description of the BT State
• The BT state is divided into Advertising, Connected, and Scanning on the basis of the
state of connection with the Remote device and the UART operation mode (see “the
UART operation mode ").
1.4.1 ADVERTISING
It comes under ADVERTISING in the BLE Server mode and under ADVERTISING in all
cases not connected with the Remote Client device.
In case of the Advertising state, the UART operation mode always operates in the AT-
COMMAND mode.
1.4.2 CONNECTED
It comes under CONNECTED when already connected with the Remote
device. In this case, the data generated from the HOST is all sent to the
Remote device.
1.4.3 SCANNING
It comes under SCANNING in the BLE Server mode and under SCANNING
in all cases not connected with the Remote device.
1.5. Description of the BT GPIO
• Three GPIOs are allocated separately in order to make easy the state or control of the
the BT in the HOST.
1.5.1. Indication of Server/Client Connection State (GPIO3)