DC801_DC24PartyBadge

Party badge and BLE hardware board

Hardware

Board design is in Eagle

Board consists of:

Rigado BMD-200 Bluetooth low energy based on a Nordic nRF51822

• 16MHz ARM® Cortex™ M0 CPU, 256kB of flash memory, 32kB RAM

• https://www.rigado.com/product/bmd-200/

• 2 RGB LEDs

• 10 orange LEDs addressable in pairs

• Single button

• A MCP73831 LiPo battery charger

• Spare pins (I2C)

• JTAG interface

• Micro USB - for charging only

• Kickass silkscreen

Software

Environment is the nRFgo Studio and Keil need a segger j-link programmer custom_board.h goes in the C:\Keil_v5\ARM\Pack\NordicSemiconductor\nRF_Examples\11.0.0-2.alpha\bsp Uses the soft device s130v1 firmware

Device is programmed with the softdevice first, then the application is loaded

What's it do?

The badge, when powered on, will run in one of 5 modes.

• Mode 1 - 'Knight Rider' pattern
• Mode 2 - Alternating red eyes
• Mode 3 - Color strobe eyes
• Mode 4 - Battery indicator - voltage as a percentage of 3.7V. Each pair lit is 20%, flashing means 10% instead - add the pairs together to get percentage (increases to the right)
• Mode 5 - Randomly firing orange LEDs

In all modes the bluetooth stack is working as an Eddystone, which broadcasts a URL every 100ms. Newer phones will automatically see the URL and display a notification for it.