Trouble to read, write and activate notification

RE: Trouble to read, write and activate notification

DavidC — Wed, 21 Jun 2017 09:00:53 GMT

Thanks! it was so usefull!

RE: Trouble to read, write and activate notification

Sigurd — Fri, 16 Jun 2017 08:38:39 GMT

Hi,

When calling sd_ble_gattc_write you will get a BLE_EVT_TX_COMPLETE / BLE_GATTC_EVT_WRITE_CMD_TX_COMPLETE when the packet has been transmitted for write commands(write without response). For write requests you will get a BLE_GATTC_EVT_WRITE_RSP when the packet is received by the peer.

sd_ble_gattc_write() will return NRF_SUCCESS when it has started the write procedure. When you are doing write request you it will return NRF_ERROR_BUSY(=0x11) if a write request procedure is already ongoing,e.g. you have not received a BLE_GATTC_EVT_WRITE_RSP for your previous write request.

Only one write with response procedure can be ongoing per connection at a time. If the application tries to write with response while another write with response procedure is ongoing, the function call will return NRF_ERROR_BUSY. Either wait for the event BLE_GATTC_EVT_WRITE_RSP before calling sd_ble_gattc_write(), or do Write without Response.

Relevant Message Sequence Chart:

RE: Trouble to read, write and activate notification

DavidC — Thu, 15 Jun 2017 09:01:08 GMT

it doesn´t matter in which order i put them, the first will work correctly but the second and the third will have an error

RE: Trouble to read, write and activate notification

DavidC — Wed, 14 Jun 2017 12:57:03 GMT

Hi Sigurd, the funcions that I am using are the followin: Activating the notifications: err_code = sd_ble_gattc_write(m_conn_handle[conn_nummber], &write_params); Reading: err_code = sd_ble_gattc_read(m_conn_handle[conn_nummber],FREQUUID,0);

Set the Freque. err_code = sd_ble_gattc_write(m_conn_handle[conn_nummber], & write_params_SR);

uint8_t p_value[2] = {0x01, 0x01}; /*/ uint8_t sample_rate = 0x64; /*/

static ble_gattc_write_params_t const write_params = { .write_op = BLE_GATT_OP_WRITE_REQ, .handle = QUATERNIOSUUID, .offset = 0, .len = 2, .p_value = (uint8_t *)&p_value };

static ble_gattc_write_params_t write_params_SR = { .write_op = BLE_GATT_OP_WRITE_REQ, .handle = FREQUUID, .offset = 0, .len = sizeof(sample_rate), .p_value = (uint8_t *)&sample_rate };

RE: Trouble to read, write and activate notification

Sigurd — Wed, 14 Jun 2017 11:09:54 GMT

Hi,

What functions are returning the 0x11 error code?