sending data to a particular peripheral in multi connection in central

RE: sending data to a particular peripheral in multi connection in central

sowmiya — Sat, 04 Jul 2020 00:43:20 GMT

Ya...thank you for your reply ...

Completed the implementation and its working fine...

RE: sending data to a particular peripheral in multi connection in central

Dmitry — Fri, 03 Jul 2020 20:35:03 GMT

If you're asking about an implementation of mapping algorithm - sorry, I don't have a ready solution, but it's quite simple: an array of structures containing two fields (handle and address), and a function that walks through this array, comparing each address with that you want to send data to, and returning corresponding handle field. In case of 5 entres there's even no need to worry about optimization.

RE: sending data to a particular peripheral in multi connection in central

sowmiya — Fri, 03 Jul 2020 13:40:13 GMT

yes found that but to passing a conn_handle for only particular peripheral ,

i m strucked at the place of mapping in c code when connected ??

if u have any code based on this mapping kindly share the code ..it would be grateful for me

regards,

sowmiya

RE: sending data to a particular peripheral in multi connection in central

Dmitry — Fri, 03 Jul 2020 13:11:56 GMT

ble_lbs_c_t structure has conn_handle field, you can call ble_lbs_led_status_send() only in case m_lbs_c[i].conn_handle matches the handle for required peer address in your map.

RE: sending data to a particular peripheral in multi connection in central

sowmiya — Fri, 03 Jul 2020 06:03:20 GMT

yes ,thank you ..i can able to get evt->evt.gap_evt.conn_handle and evt->evt.gap_evt.params.connected.peer_addr.addr

for every connection.

but in my application after 5 connections of peripheral to one central , i will send data along with anyone of the connected peripheral peer address that time,

1.how can i choose in central to send data to a particular peripheral ??

2 .how can i map the peer address with that id ??

for (uint32_t i = 0; i< NRF_SDH_BLE_CENTRAL_LINK_COUNT; i++)
{
err_code = ble_lbs_led_status_send(&m_lbs_c[i], 0);
if (err_code != NRF_SUCCESS &&
err_code != BLE_ERROR_INVALID_CONN_HANDLE &&
err_code != NRF_ERROR_INVALID_STATE)
{
return err_code;
}

if i used like above function , its sending data to all peripherals , here how can i differentiate the one peripheral and that connection id???

RE: sending data to a particular peripheral in multi connection in central

Dmitry — Thu, 02 Jul 2020 20:07:06 GMT

Hi,

Peer address can be found in connection event data passed along with BLE_GAP_EVT_CONNECTED event. You can create a map that will store connection handle and corresponding peer address for each connection.

if (evt->header.evt_id == BLE_GAP_EVT_CONNECTED) {
    uint16_t handle = evt->evt.gap_evt.conn_handle;
    uint8_t *addr = evt->evt.gap_evt.params.connected.peer_addr.addr;
    // add handle:addr pair to the map
}