Problem when I send more than 8 packets

RE: Problem when I send more than 8 packets

Christopher — Fri, 20 May 2016 20:26:27 GMT

Have a look at this sequence diagram which present a way to manage BLE TX packets: infocenter.nordicsemi.com/index.jsp

RE: Problem when I send more than 8 packets

Ole Bauck — Thu, 25 Feb 2016 09:44:45 GMT

You are very welcome :) on_ble_evt() is run at priority app_priority_low, so if waiting for something to happen in this event handler from another event handler you will wait forever.

RE: Problem when I send more than 8 packets

cbp — Wed, 24 Feb 2016 22:40:46 GMT

You have said "You should also not do this in an event handler, but in main."

Well, that was the problem. It's solved!! Thank you very much Ole!!!

RE: Problem when I send more than 8 packets

Ole Bauck — Wed, 24 Feb 2016 16:39:20 GMT

You forgot semicolon after while(tx_complete==false) so it will be equal to

while(tx_complete==false)
{
    tx_complete=false;
}

You should also not do this in an event handler, but in main.

RE: Problem when I send more than 8 packets

cbp — Wed, 24 Feb 2016 14:48:46 GMT

I have put in my code this:

err_code = ble_mag_string_send(&m_mag, datos_ble, i);
if( err_code == BLE_ERROR_NO_TX_BUFFERS){
	while(tx_complete==false)
	tx_complete=false;
	err_code = ble_mag_string_send(&m_mag, datos_ble, i);
}

and this in on_ble_event():

case BLE_EVT_TX_COMPLETE:
					tx_complete=true;
					break;

But again, when the Nexus 5 have received 8 packets of 20 bytes, the communication is over :S

RE: Problem when I send more than 8 packets

Ole Bauck — Wed, 24 Feb 2016 14:37:20 GMT

Changed the answer. sd_ble_tx_packet_count_get(..) will only get the size of the buffer for that connection (7 packets).

RE: Problem when I send more than 8 packets

Ole Bauck — Tue, 23 Feb 2016 17:59:49 GMT

You can only send 6 packets per connection interval with the SoftDevice (it may also be less on the phone/central side). It will have buffers for 7 full packets and if you try to send more you will get error 0x3004, BLE_ERROR_NO_TX_PACKETS (formerly known as BLE_ERROR_NO_TX_BUFFERS). When you get this error you should wait to send until you get BLE_EVT_TX_COMPLETE event.