Does the nrf51822qfaa can support a ANCS application(and have customize serves) with DFU function?

[mike zt]

Hi,I now use the nrf51822qfaaho,s110 v8.00. I need do a application , have customize serves, with ancs ,and with DFU function. Does the chip can support this? Who can help me do a example?

[Einar Thorsrud]

Yes, you can use this chip with a large application (including ANCS and custom services) together with DFU. The limiting factor when it comes to DFU is flash, and the QFAAH0 has a large flash of 256 kB (though it only has 16 kB RAM). The compatibility matrix provide a good comparison of the available variants. Remember to adjust the bootloader and application in the examples to your device with less RAM.

There is no ANCS example with DFU in the SDK, but the SDK has some other examples with DFU that you can learn from (for example the Heart Rate Application). There is also extensive documentation accompanying the DFU examples.

[mike zt]

Thank you ,Einar Thorsrud.

Now i find a question: i use the Heart Rate Application example,ANCS, add custom services, and together with DFU.

1.I use a android mobile phone to connect the nrf51822,then is OK. But I use a ios mobile phone to connect the nrf51822,then The NRF51822 chip disconnected immediately.

2.If i remove the with DFU function,and use a ios mobile phone to connect the nrf51822,then is OK,

WHY?