UM11082
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User Manual
Rev. 1.1 — 12 January 2018
9 of 18
NXP Semiconductors
LPC8N04 Development Board
User Manual
3.2.4 Playing a tune
To enable the speaker, jumper JP9 needs to be set such that the speaker is enabled
instead of the top row of LEDs (see
Figure 3
). By default, the firmware will assume this
GPIO is being used for the LED row, but will switch to driving the speaker once a push of
button S2 is detected. Because of this, the speaker will making a buzzing sound until S2 is
pressed.
There are 3 tunes available on the App. To change the tune, simply tap on the name of
the tune to be played, then tap Write NDEF. Fur Elise is programmed into the EEPROM
during manufacture of the Development Board.
Fig 5.
Updating the scrolling message