Sending 32 bit of data from nrf52 ble moble app onto nrf52833

RE: Sending 32 bit of data from nrf52 ble moble app onto nrf52833

Sigurd — Wed, 16 Jun 2021 13:03:37 GMT

[quote user=""]p_evt_write->data[0] which is uint8_t data[0] unable to receive the data properly.[/quote]

You can find the length of the data in p_evt_write->len , then based on this, you can find the rest of the data in p_evt_write->data[0], p_evt_write->data[1], p_evt_write->data[2], p_evt_write->data[3] , etc. As mentioned in ble_gatts_evt_write_t, uint8_t data[1]; /**< Received data. @note This is a variable length array. The size of 1 indicated is only a placeholder for compilation.

RE: Sending 32 bit of data from nrf52 ble moble app onto nrf52833

amey3 — Tue, 15 Jun 2021 14:26:47 GMT

i have set add_char_params.max_len as 50; do i have to change add_char_params.max_len to set as size of (uint32_t).please reply me

RE: Sending 32 bit of data from nrf52 ble moble app onto nrf52833

Sigurd — Tue, 15 Jun 2021 14:19:59 GMT

Hi,

How did you Initialize this characteristic?

What did you set add_char_params.max_len / attr_char_value.max_len to ?

Example snippet from LBS service:

    // Add LED characteristic.
    memset(&add_char_params, 0, sizeof(add_char_params));
    add_char_params.uuid             = LBS_UUID_LED_CHAR;
    add_char_params.uuid_type        = p_lbs->uuid_type;
    add_char_params.init_len         = sizeof(uint8_t);
    add_char_params.max_len          = sizeof(uint8_t);
    add_char_params.char_props.read  = 1;
    add_char_params.char_props.write = 1;

    add_char_params.read_access  = SEC_OPEN;
    add_char_params.write_access = SEC_OPEN;

    return characteristic_add(p_lbs->service_handle, &add_char_params, &p_lbs->led_char_handles);