esp32 Partial data write into ADV

I assume you are asking about how to write partial data into the advertisement (ADV) data of an ESP32 device. To do this, you can use the `esp_ble_gap_config_adv_data_raw()` function to set the raw advertisement data. Here's an example code snippet that shows how to set a partial advertisement data:

// define your partial advertisement data
uint8_t adv_data[] = {0x02, 0x01, 0x06, 0x03, 0x19, 0xc1, 0x03};

// set the partial advertisement data
esp_err_t ret = esp_ble_gap_config_adv_data_raw(adv_data, sizeof(adv_data));

if (ret != ESP_OK) {
    // handle error
}

In this example, the `adv_data` array contains the partial advertisement data that you want to send. The `sizeof(adv_data)` parameter specifies the size of the partial advertisement data. The `esp_ble_gap_config_adv_data_raw()` function sets the raw advertisement data using the given `adv_data` array. Note that this function overwrites the entire advertisement data, so you need to include any other data that you want to advertise in the `adv_data` array.