Using ESB with S110 on a beacon board

[Johnson]

I intend to use ESB to transmit data every a few hours. Since I want to use a beacon board, I assume the ESB app needs to sit on the S110 softdevice.

I added S110 to the ESB TX example code (esb_ptx_ack_payload_pca10028) in SDK 9.0.0. When the project was built in Keil, it threw an error.

linking... ._build\nrf51422_xxac.axf: Error: L6200E: Symbol SWI0_IRQHandler multiply defined (by nrf_notification_manager.o and app_timer.o). Not enough information to list image symbols. Not enough information to list the image map. Finished: 2 information, 0 warning and 1 error messages. "._build\nrf51422_xxac.axf" - 1 Error(s), 0 Warning(s).

It looks related to the issue reported in this post. But I don't quite understand the solution in that post.

[Stefan Birnir Sverrisson]

Hi Johnson

The nRF Beacon kit contains a normal nRF51822 chip, so it does not need a softdevice rather than a nRF51-DK kit. The beacon kit ships however with preprogrammed S110 softdevice and a bootloader, but if you connect a programmer to the Beacon kit, you can erase that softdevice and bootloader and flash whatever you want.

ESB is a proprietary protocol and can not use BLE softdevice. You should just flash your ESB code to the nRF51822 as standalone, without softdevice.

[Johnson]

If I want it to have DFU bootloader for future update, I need to add S110, don't I?