odd problem with sd_ble_gatts_hvx()

RE: odd problem with sd_ble_gatts_hvx()

sam — Tue, 07 Jun 2016 00:55:20 GMT

Hi,

i have the same problem running on Android but iOS is ok, does anyone has a suggestion or solution for this?

thanks,

RE: odd problem with sd_ble_gatts_hvx()

Pål Håland — Tue, 29 Jul 2014 05:35:54 GMT

I don't know about that.

RE: odd problem with sd_ble_gatts_hvx()

gootoomoon — Mon, 28 Jul 2014 13:50:43 GMT

Can I config something to make Android enable it auto? I find a ble device can enable it when connect it to MCP ,but my device must enable it by click enable button.

RE: odd problem with sd_ble_gatts_hvx()

Pål Håland — Mon, 28 Jul 2014 08:38:44 GMT

Hi gootoomoon,

As far as I remember, the IOS automatically enables the notifications if you have registered for it. But the Android I think you have to manually do it.

developer.android.com/.../bluetooth-le.html search for setCharacteristicNotification

BR Pål

RE: odd problem with sd_ble_gatts_hvx()

Håkon Alseth — Mon, 28 Jul 2014 08:36:44 GMT

What version of android are you using? 4.4.4? Do you see the same problem on several android phones?

Err_code 8 (INVALID_STATE) indicates that the CCCD is not set properly from the central side:

@return @ref NRF_ERROR_INVALID_STATE Invalid state to perform operation, notifications or indications must be enabled in the CCCD.