I need to update a characteristic to use write and write without response flags
I'm able to get this working on one of the characteristics but not the other
Running legacy nrf sdk 17.1
When I run this code, the ble characteristic shows up (on nrf Connect) as write only (with response required)
// Add the CMD Characteristic to SoftDevice.
std::memset(&add_char_params, 0, sizeof(add_char_params));
add_char_params.uuid = BLE_UUID_DATA_CMD_CHAR;
add_char_params.uuid_type = p_dcs->uuid_type;
add_char_params.max_len = BLE_DATA_MAX_CMD_CHAR_LEN;
add_char_params.init_len = sizeof(uint8_t);
add_char_params.is_var_len = true;
add_char_params.char_props.write_wo_resp = 1; // this should work
// Write request
add_char_params.char_props.write = 1;
// CMD characteristic has no authorization, no encryption and is not readable
add_char_params.read_access = SEC_NO_ACCESS;
// CMD characteristic is writable
add_char_params.write_access = SEC_OPEN;
err_code = characteristic_add(p_dcs->service_handle, &add_char_params, &p_dcs->cmd_handles);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
When I run this code (different UUID) it works and nrf Connect shows it having write and write without response abilities
// Add the RCS_TX Characteristic to SoftDevice. This characteristic will
// receive data that will be written to the NRF52840 MCU.
std::memset(&add_char_params, 0, sizeof(add_char_params));
add_char_params.uuid = BLE_UUID_DATA_RCS_TX_CHAR;
add_char_params.uuid_type = p_dcs->uuid_type;
add_char_params.max_len = BLE_DATA_BLERCS_MAX_TX_CHAR_LEN;
add_char_params.init_len = sizeof(uint8_t);
add_char_params.is_var_len = true;
// Write command
add_char_params.char_props.write_wo_resp = 1;
// Write request
add_char_params.char_props.write = 1;
// No BLE restrictions on access to characteristic, however the firmware
// will disconnect unless the peer has authenticated.
add_char_params.read_access = SEC_OPEN;
add_char_params.write_access = SEC_OPEN;
err_code = characteristic_add(p_dcs->service_handle, &add_char_params, &p_dcs->rcs_tx_handles);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
Here is the nrf Connect output:
What am I doing wrong?
