nRF5340 - setting public bt address

Question

Hello, 
 Still on my custom nRF5340 board for a Bluetooth LE peripheral application (building environment: NCS 2.2.0, Zephyr 3.2.99). The net core is populated with the Zephyr HCI RPMsg sample LE Controller as it is. I don't want to change it if possible. 
 The problem is how to move from working random address to public address for advertising ? I've found a couple of functions around, namely bt_ctlr_set_public_addr() and sdc_hci_cmd_vs_zephyr_write_bd_addr(). However, for a reason or another things mess up. 
 To start clean, and depending on my case of use, can anyone pass a recipe in terms of 
 1. API name 2. prj.conf configs 3. include file(s) 
 Thank you very much

Gabriele · Accepted Answer

I've solved as follows, strongly inspired to link . #include static char bt_mac_buf[BT_ADDR_LE_STR_LEN]; void ble_set_mac(bt_addr_t* addr) { struct net_buf *buf; int rc; buf = bt_hci_cmd_create(BT_HCI_OP_VS_WRITE_BD_ADDR, sizeof(*addr)); if (!buf) { LOG_ERR("failed to create buffer [%d]", -ENOBUFS); } net_buf_add_mem(buf, addr, sizeof(*addr)); rc = bt_hci_cmd_send_sync(BT_HCI_OP_VS_WRITE_BD_ADDR, buf, NULL); if (rc) { LOG_ERR("failed to set BT address [%d]", rc); } } int ble_init(void) { bt_enable(NULL); /* check for public address in UICR.OPT area */ if(NRF_UICR->OTP[0] != 0xffffffff && \ NRF_UICR->OTP[1] != 0xffffffff) { LOG_INF("setting public address retrieved from UICR"); bt_addr_t addr; uint8_t tmp[BT_ADDR_SIZE]; int i; memcpy(&tmp[0], (uint8_t *)&NRF_UICR->OTP[0], BT_ADDR_SIZE); for (i=0; i < BT_ADDR_SIZE; i++) { addr.val[i] = tmp[BT_ADDR_SIZE - i -1]; } ble_set_mac(&addr); } else { LOG_INF("going to set random static address"); } if (IS_ENABLED(CONFIG_SETTINGS)) { settings_load(); } }

nRF5340 - setting public bt address

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