Error on writing characteristic (133)

[michel]

Hi

I'm testing the nRF Toolbox for Android. But I get this error when I try to connect using the proximity feature:

I'm using the nrf51822 EK with the s110 ble_app_proximity and the phone is a Samsung Galaxy S4 with android 4.4.2

I have also made some debugging, but I don't know how to fix this problem:

Thanks

[Hung Bui]

Hi Michel,

Once a while we saw this error code. It's not described in the Android BLE documentation. However, the error usually come from the Att table being cached. So if you turn off and on bluetooth on the phone, it should usually fix the issue.

If the error occurs programmatically (that you can reproduce it again and again) please let me know.

Example hex file that worked for me ble_app_proximity.hex

[michel]

Thank you Hung Bui,

The error occurs programmatically. I have tried what you said, also I have erased the bond in both devices.

[Hung Bui]

Hi Michel,

Could you give me a step by step instruction on how to reproduce it ? Please let me know your S110 version, application you use. A power reset on the phone, should also be tried.

[michel]

Hi Hung Bui,

I did power reset as you told me, but the error remains. Is the ble_app_proximity S110 v 7.0. I follow these steps:

1. Open nrftoolbox.
2. Select proximity feature.
3. Click on connect.
4. Select my device.
5. They bond.
6. Suddenly the error appears.
7. The connection get lost.

I have tried with the nrf master control panel for android and there is no problem. I can connect and discover services. I think that the problem is in the nrf toolbox app.

[Hung Bui]

Hi Michel,

Could you try to remove bond (and turnoff and on bluetooth) and let them bond again ? One of the main different between the nRFMaster Control Panel and nRFToolbox is that the nRF Master Control Panel use a non-official API refresh() to clear the GATT table cache.

I'm testing here with the S4, Android 4.4.2 and proximity example SDK 6.1 S110 v7.0 and don't see the same error, the setup worked fine with nRFToolbox app.

Update: After trying for awhile I'm seeing the error now. I will test more and let you now if I can find smth.