LM LM068 - LED Indication; Power on LED Sequence; Led0; Led1

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User Manual for “LM068_BLE_Peri_0204” FW

5. LED Indication

5.1 Power on LED sequence

1. All LEDs blink fast during power on for 3 seconds. User can notice all

LEDs blinks together approximately 6 to 7 times.

2. The LM device shows the power on LED sequence after AT*Reset=1

and AT*Reset=2 commands.

5.2 LED0

1. LED0 (RED LED on LM068) is constantly ON to indicate that the LM

device is powered and is ready to process AT commands and is in

working condition.

2. If LED0 is not ON, LM068 adapter might have not powered correctly

or not initialised.

3. The state of LED0 is irrespective of Bluetooth connection or pairing

state.

5.3 LED1

1. On LM devices, LED1 (Yellow LED on LM068) indicates the data

transfer in the BLE connected state.

2. When the LM device is not connected to the remote device, LED1

should be OFF.

3. When the LM device is connected to remote GAP central device, LED1

is ON while the LM device is sending/receiving data to/from the

remote device.

4. LED1 should be off when there is no active data transfer on the BLE

connection.

5.4 LED2

5.4.1 Connected state:

LED2 (Blue LED on LM068) shall be constant ON when the LM

device is connected to the remote GAP central device.

5.4.2 BLE advertiser-mode:

When the LM device is in BLE peripheral mode and is advertising

and ready to connect, LED2 will keep blinking fast until the

module/LM device enters Connected state or enters in Pairing

mode.

5.4.3 Pairing State

When the LM device is in pairing mode, LED-1 and LED2 will keep

blinking fast until pairing is completed.