nrf52 in central role doesn't see characteristics on android

RE: nrf52 in central role doesn't see characteristics on android

ageron — Wed, 01 Nov 2017 14:12:15 GMT

found a reason. Mostly my fault. nrf connect for windows reads all readable characteristics and fails if nothing is answered, without showing list of characteristics

RE: nrf52 in central role doesn't see characteristics on android

ageron — Tue, 31 Oct 2017 15:33:15 GMT

Hmmm... Looks like created by nrfconnect works, but i see no difference between my characteristic and the created by nrfconnect one. It is visible if i set PROPERTY_READ and PERMISSION_READ or PROPERTY_WRITE and PERMISSION_WRITE, but something goes wrong if I use both of them the same time, like this:

BluetoothGattCharacteristic characteristic = new BluetoothGattCharacteristic(characteristicUUID,
            BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_WRITE,
            BluetoothGattCharacteristic.PERMISSION_READ | 
            BluetoothGattCharacteristic.PERMISSION_WRITE);

RE: nrf52 in central role doesn't see characteristics on android

Jørgen Holmefjord — Tue, 31 Oct 2017 13:05:32 GMT

Ok, so you are writing your own custom app. Could you try setting up a peripheral using nRF Connect for Android app? Click the three lines in top left corner, select Configure GATT server, and setup the desired services/chars. Then go to Advertiser tab and setup the desired advertising settings/data. Now, check if you can see the chars from the nRF52 board.

RE: nrf52 in central role doesn't see characteristics on android

ageron — Tue, 31 Oct 2017 11:17:23 GMT

I suppose there is only 1 way to setup peripheral on android - by calling btGattServer.addService(service) where service is BluetoothGattService with BluetoothGattCharacteristics

It is visible with other android phones and with other bt modules, but nrf52 can't find any characteristics inside service(service is visible)

RE: nrf52 in central role doesn't see characteristics on android

Jørgen Holmefjord — Tue, 31 Oct 2017 10:12:28 GMT

How did you setup the peripheral and service/characteristics?