Hi.
I wanna test 1650 byte periodic advertise.
I have reffered the following QAs.
https://devzone.nordicsemi.com/f/nordic-q-a/88164/advertising-1650-bytes-of-host-advertising-data-in-an-auxiliary-segment-using-advertising-extensions
https://devzone.nordicsemi.com/f/nordic-q-a/92514/updating-data-in-chained-periodic-advertising-1-650-bytes
My environments and codes are the following.
[Enviroments]
NCS SDK2.5.1
nRF52840-DK
Windows10 64bit
Sniffer: ellisys BEX400
[Codes]
It is based on "periodic_adv".
main.c
/*
* Copyright (c) 2020 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/bluetooth/bluetooth.h>
#define ADV_SIZE 200
static uint8_t mfg_data[ADV_SIZE] = { 0 };
static const struct bt_data ad[] = {
BT_DATA(BT_DATA_MANUFACTURER_DATA, mfg_data, ADV_SIZE),
BT_DATA(BT_DATA_MANUFACTURER_DATA, mfg_data, ADV_SIZE),
BT_DATA(BT_DATA_MANUFACTURER_DATA, mfg_data, ADV_SIZE),
BT_DATA(BT_DATA_MANUFACTURER_DATA, mfg_data, ADV_SIZE),
};
//NOTE -
/*
struct bt_data {
uint8_t type;
uint8_t data_len; //! cause of this type, ADV_SIZE is 255 at max.
const uint8_t *data;
};
*/
int main(void)
{
struct bt_le_ext_adv *adv;
int err;
printk("Starting Periodic Advertising Demo\n");
/* Initialize the Bluetooth Subsystem */
err = bt_enable(NULL);
if (err) {
printk("Bluetooth init failed (err %d)\n", err);
return 0;
}
/* Create a non-connectable non-scannable advertising set */
err = bt_le_ext_adv_create(BT_LE_EXT_ADV_NCONN_NAME, NULL, &adv);
if (err) {
printk("Failed to create advertising set (err %d)\n", err);
return 0;
}
/* Set periodic advertising parameters */
err = bt_le_per_adv_set_param(adv, BT_LE_PER_ADV_DEFAULT);
if (err) {
printk("Failed to set periodic advertising parameters"
" (err %d)\n", err);
return 0;
}
/* Enable Periodic Advertising */
err = bt_le_per_adv_start(adv);
if (err) {
printk("Failed to enable periodic advertising (err %d)\n", err);
return 0;
}
printk("Start Extended Advertising...");
err = bt_le_ext_adv_start(adv, BT_LE_EXT_ADV_START_DEFAULT);
if (err) {
printk("Failed to start extended advertising "
"(err %d)\n", err);
return 0;
}
printk("done.\n");
while (true) {
k_sleep(K_SECONDS(10));
mfg_data[0] = 0xFF;
mfg_data[1] = 0xFF;
mfg_data[2] = 0x00;
for(int j=3; j<ADV_SIZE; j++){
mfg_data[j]=j;
}
printk("Set Periodic Advertising Data...");
err = bt_le_per_adv_set_data(adv, ad, ARRAY_SIZE(ad));
if (err) {
printk("Failed (err %d)\n", err);
return 0;
}
printk("done.\n");
}
return 0;
}
prj.conf
CONFIG_BT=y CONFIG_BT_EXT_ADV=y CONFIG_BT_PER_ADV=y CONFIG_BT_DEBUG_LOG=y CONFIG_BT_DEVICE_NAME="Test Periodic Advertising" CONFIG_LOG=y CONFIG_BT_CTLR_ADV_EXT=y CONFIG_BT_CTLR_ADV_PERIODIC=y CONFIG_BT_CTLR_ADV_DATA_LEN_MAX=1650
When this code is builded and debuged, AUX_SYNC_IND packet is just 1byte (0x00).
In the case that the data size is 200 like the bellow, AUX_SYNC_IND packet is 203byte and the data looks correct.
#define ADV_SIZE 200
static uint8_t mfg_data[ADV_SIZE] = { 0 };
static const struct bt_data ad[] = {
BT_DATA(BT_DATA_MANUFACTURER_DATA, mfg_data, ADV_SIZE),
// BT_DATA(BT_DATA_MANUFACTURER_DATA, mfg_data, ADV_SIZE),
// BT_DATA(BT_DATA_MANUFACTURER_DATA, mfg_data, ADV_SIZE),
// BT_DATA(BT_DATA_MANUFACTURER_DATA, mfg_data, ADV_SIZE),
};
To chain the data exceeding 255byte, how should I do?
Could you tell me any mistakes in the codes?
Thank you.
