Can I change the BT MAC address via esp-hosted-fg?I was used linux driver.

[244219195]

Checklist

• Checked the issue tracker for similar issues to ensure this is not a duplicate.
• Provided a clear description of your suggestion.
• Included any relevant context or examples.

Issue or Suggestion Description

I want to add device node in linux .and then .,i can set this node value to set BT mac for ESP32 -C3 .if have other way to set the BT MAC address.Please tell me .Actually, my idea is to be able to set the Bluetooth address through Linux instead of using the default address.however ，my linux kernel is low ,it can"t support python.

[mantriyogesh]

Hello @244219195 , yes this needs to be added.

Plan would be to make wifi_set_mac deprecated and add up additional mode (diff name then with uint32) for Bluetooth with newer api, set_mac()

We will add this support and let you know. However, It might take some time.

For your case, you can just make small changes and re-use this API at higher layer, with hacks to handle bluetooth case, at both esp and host side code.

[244219195]

Can you provide some examples?

[mantriyogesh]

Slave side hack

Get

esp-hosted/esp_hosted_fg/esp/esp_driver/network_adapter/main/slave_control.c

Lines 303 to 316 in 250e292

	if (req->req_get_mac_address->mode == WIFI_MODE_STA) {
	ret = esp_wifi_get_mac(ESP_IF_WIFI_STA , mac);
	ESP_LOGI(TAG,"Get station mac address");
	if (ret) {
	ESP_LOGE(TAG,"Error in getting MAC of ESP Station %d", ret);
	goto err;
	}
	} else if (req->req_get_mac_address->mode == WIFI_MODE_AP) {
	ret = esp_wifi_get_mac(ESP_IF_WIFI_AP, mac);
	ESP_LOGI(TAG,"Get softap mac address");
	if (ret) {
	ESP_LOGE(TAG,"Error in getting MAC of ESP softap %d", ret);
	goto err;
	}

Set

esp-hosted/esp_hosted_fg/esp/esp_driver/network_adapter/main/slave_control.c

Lines 1517 to 1537 in 250e292

	if (req->req_set_mac_address->mode == WIFI_MODE_STA) {
	interface = WIFI_IF_STA;
	} else if (req->req_set_mac_address->mode == WIFI_MODE_AP) {
	interface = WIFI_IF_AP;
	} else {
	ESP_LOGE(TAG, "Invalid mode to set MAC address");
	goto err;
	}
	ret = esp_wifi_set_mac(interface, mac);
	if (ret == ESP_ERR_WIFI_MODE) {
	ESP_LOGE(TAG, "ESP32 mode is different than asked one");
	goto err;
	} else if (ret == ESP_ERR_WIFI_MAC) {
	ESP_LOGE(TAG, "station and softap interface has same MAC address. OR");
	ESP_LOGE(TAG, "Invalid MAC Address, The bit 0 of the first byte of ESP32 MAC address can not be 1, For example, the MAC address can set to be 1a:XX:XX:XX:XX:XX, but can not be 15:XX:XX:XX:XX:XX");
	goto err;
	} else if (ret) {
	ESP_LOGE(TAG, "Failed to set MAC address, error %d ", ret);
	goto err;
	}

Host side hack

Get

Add test_get_bt_mac_addr() similar to

esp-hosted/esp_hosted_fg/host/linux/host_control/c_support/test_utils.c

Lines 697 to 701 in 250e292

	if (mode == WIFI_MODE_STA) {
	strncpy(sta_mac_str, resp->u.wifi_mac.mac, MAC_ADDR_LENGTH);
	} else if (mode == WIFI_MODE_AP) {
	strncpy(softap_mac_str, resp->u.wifi_mac.mac, MAC_ADDR_LENGTH);
	}

Set

esp-hosted/esp_hosted_fg/host/linux/host_control/c_support/test_utils.c

Line 732 in 250e292

return test_set_mac_addr(WIFI_MODE_STA, STATION_MODE_MAC_ADDRESS);

[mantriyogesh]

Above are not exactly the solution, but the code places to hack, to easily get your work done for now.

[244219195]

Thanks，mantriyogesh.
Looking forward to the development of MAC address configuration in the future.