nrf52840 as gazell device can't obtain host's(nrf24lu1p) system address

[pipixia_8_8]

hi 

      im use nrf52840 as a gazell device which run the demo  \nRF5_SDK_16.0.0_98a08e2\examples\proprietary_rf\gzll\gzp_desktop_emulator\pca10056  ,and use nrf24lu1p

(\nrfready_desktop_2_v3.0.0\source_code\nrfready_desktop_dongle\projects\nrfready_desktop\dongle) as a gazell host.

     frist ,it run and perform perfect ,when i press the button1 in the pca10056,i can see the 'a' in my computer's input window,but when i erase the pca10056 and than program the same

hex,but this time the the keyboard 's code can't tranfer and pca10056 log "System address not received" 、"Host ID not received"、"Dyn Key not received"，i dont know why it do this,i have

never change any code.i try to erase the nrf24lu1p and re program  ,but it also show the log like before, so i nedd your terms help! thank you very  much !

[Håkon Alseth]

Hi,

 

but when i erase the pca10056 and than program the same hex

If you erase the device, you also erase the pairing data stored in flash on the device. Then you will have to pair up again, using the same sequence described here: 

https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/gzll_examples_desktop_device_emulator.html?cp=7_1_4_9_1_1

 

Could you try this and see if it works?

 

Kind regards,

Håkon

[pipixia_8_8]

thank for you reply,i have solve tjis problem. but now i face a new problem,as descripte in 

https://devzone.nordicsemi.com/f/nordic-q-a/60747/how-can-i-add-the-add-the-gzp_desktop_emulator-project-s-funcation-to-the-project-ble_app_gzll

i browse some qusetion like this problem ，as reply in 

https://devzone.nordicsemi.com/f/nordic-q-a/29052/nrf52832-error-flash-download-failed---cortex-m4

so if the application must check if need SD,where i should to modify to relase this limit ? or if the limit can relase?