Datasheet

Can I use the IRQ pin to wake my MCU up from sleep when BLE UART data is available?

handle: 0x000e value: 00 00

# Enable notifications on the RX characteristic (CCCD handle = 0x000e)

# 0100 = get notifications

# 0200 = get indications

# 0300 = get notifications + indications

# 0000 = disable notifications + indications

[D6:4E:06:4F:72:86][LE]> char-write-req 0x000e 0100

Characteristic value was written successfully

# Just to make sure it was updated

[D6:4E:06:4F:72:86][LE]> char-read-hnd 0x000e

Characteristic value/descriptor: 01 00

# Writing "test" in the Serial Monitor of the Arduino sketch should

# cause this output not that notifications are enabled:

Notification handle = 0x000d value: 74 65 73 74

# Write something to the TX characteristic (handle = 0x000b)

# This should cause E F G H to appear in the Serial Monitor

[D6:4E:06:4F:72:86][LE]> char-write-cmd 0x000b 45

[D6:4E:06:4F:72:86][LE]> char-write-cmd 0x000b 46

[D6:4E:06:4F:72:86][LE]> char-write-cmd 0x000b 47

[D6:4E:06:4F:72:86][LE]> char-write-cmd 0x000b 48

# To send multiple bytes

[D6:4E:06:4F:72:86][LE]> char-write-cmd 0x000B 707172737475

# If you are running the callbackEcho sketch and notifications

# are enabled you should get this response after the above cmd:

Notification handle = 0x000d value: 70 71 72 73 74 75

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# If you just want to enable constant listening, enter the following command from the CLI:

$ sudo gatttool -b D6:4E:06:4F:72:86 -t random --char-write-req -a 0x000e -n 0100

# This should give us the following output as data is written on the Uno,

# though we can't send anything back:

Characteristic value was written successfully

Notification handle = 0x000d value: 74 65 73 74

Notification handle = 0x000d value: 6d 6f 72 65 20 74 65 73 74