Central role with high Bandwidth problem

RE: Central role with high Bandwidth problem

Jackxl — Wed, 15 Mar 2017 09:41:33 GMT

I have MiniBeacon as peripheral nrf51822xAB and PCA10028 as central. I solved my problem when I have increased QUETED_WRITE_BUFFER_SIZE from 80 to 200 bytes. Now I don't need 6 buffers.

RE: Central role with high Bandwidth problem

FormerMember — Wed, 15 Mar 2017 08:21:11 GMT

Which device is at the other side of the link? Do you know that that device supports more than 3 packets per connection interval?

RE: Central role with high Bandwidth problem

Jackxl — Mon, 13 Mar 2017 10:12:10 GMT

Fce sd_ble_tx_packet_count_get shows me 6 buffers, but It still doesn't work. I want send 80 bytes,but only 54 bytes is send.it seems only 3 tx buffers.

RE: Central role with high Bandwidth problem

FormerMember — Fri, 03 Feb 2017 09:44:06 GMT

1) To set high bandwidth, you can try the following:

uint32_t  opt_id;
uint32_t  err_code;
ble_opt_t softdevice_options;

....
ble_stack_init();
....
softdevice_options.common_opt.conn_bw.role               = BLE_GAP_ROLE_CENTRAL;  	      
softdevice_options.common_opt.conn_bw.conn_bw.conn_bw_rx = BLE_CONN_BW_HIGH;
softdevice_options.common_opt.conn_bw.conn_bw.conn_bw_tx = BLE_CONN_BW_HIGH;

err_code = sd_ble_opt_set(BLE_COMMON_OPT_CONN_BW, &softdevice_options);
APP_ERROR_CHECK(err_code);

2) When I test here, it is not necessary to change RAM settings when enabling high bandwidth . Whether or not high bandwidth will affect UART, SPI, TWI, you would need to test.