Error "Writing is not Permitted" on iOS app for RACP characteristic

[SumitS]

Hi,

I am using the sample BLE_gls code provided by Nordic. I have made the following changes in the code:

#define SEC_PARAM_MITM 0 #define SEC_PARAM_IO_CAPABILITIES BLE_GAP_IO_CAPS_NONE

I am developing a customised iOS app. When i try to write to the RACP, i am getting an error "Writing is not Permitted".

Can you please help with this.

Thanks

[run_ar]

hmm, as far as I can see the write is set to BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM. So it should be possible to write to it provided you have bonded to the device, did you do this?

[SumitS]

Hi,

Ok. I found the issue. We have changed the BLE_UUID_GLUCOSE_SERVICE to 0x0001. The RACP is not working with this. But when i changed the BLE_UUID_GLUCOSE_SERVICE to 0x1808 its working. I am not facing this issue with NRF app on android phone. But i am facing the issue on iOS. Is there any restrictions for using a customised UUID on iOS?

[run_ar]

The glucose service is a Bluetooth sig defined service, so you are not allowed to change the UUID of the service.

[SumitS]

But i want to develop a custom service. So are there any restrictions for this in iOS. On the iOS side also i am developing the same custom service.

[run_ar]

Then you should use a vendor specific UUID. You can see how to use a vendor specific UUID in the ble_uart example in our SDK.