![]() (Hexadecimal number system uses 16 symbols instead of 10 like the conventional number system.) For example, a MAC address might look something like this: 00-0C-29-20-4A-E4. The MAC address comprises six pairs of hexadecimal digits. ![]() By looking at the MAC address, you can quickly identify which hardware device is sending or receiving data. MAC addresses can be used to troubleshoot connection problems on a network.For instance, if you want to find out which devices are connecting to your Wi-Fi network, you can look at the MAC addresses of the connected devices. MAC addresses can be used for tracking purposes.This can be used to prevent unauthorized devices from joining the network. Many routers allow you to specify which MAC addresses can access the network.MAC addresses can also be used for other purposes, such as identifying devices for security or controlling network access. The receiving device can then use the MAC address to identify the sender and send a reply. When a device sends data over a network, the data is accompanied by the MAC address of the sending device. Bluetooth connections also have their unique MAC addresses. For example, you might have two MAC addresses-one for Ethernet and one for Wifi. If two devices had the same MAC address, they would be trying to use the same resources, which would cause errors.Īs a MAC address is assigned to each network interface, devices can have multiple MAC addresses. This is important because MAC addresses need to be unique so that they can be correctly processed by network protocols. MAC addresses are often assigned by the manufacturer of a Network Interface Controller (NIC) and are stored in its hardware, such as the read-only memory (ROM) or the device’s firmware. MAC addresses are used by the Media Access Control layer of the OSI model. MAC stands for Media Access Control, and MAC addresses are also referred to as Every device that connects to a network has a unique MAC address. MAC addresses play an essential role in networking because they provide a way for devices to identify themselves and communicate with each other uniquely. Using third-party software to change the MAC address.How to change the MAC address in Mac OS.How to change the MAC address of a device?.How to find the MAC address on Android?.How to find the MAC address on a Windows device?.What are the differences between MAC Address and IP Address?.In this article, we will take a closer at MAC addresses and try to answer some of the frequently asked questions like: They uniquely identify devices on a network and are necessary for most layer two protocols. MAC addresses are a critical part of networking. First of all, download the complete project from the following link and build the project.This tool allows you to check the vendor of a given piece of hardware by checking its MAC address. In this section, we will see a demo to get and set the custom MAC address of ESP32. Uint8_t mac_address = ESP32 ESP-IDF OpenWeatherMap API Sensorless Weather Station Demo Finally prints them on the serial console of VS code.Ĭopy this code to the main.c file in the esp-idf project that we created above. This ESP32 ESP-IDF code gets the default MAC address and then proceeds to change it to a custom value. ESP32 ESP-IDF Code to Get and Set Custom MAC Address There are several folders inside our project folder. This opens the project that we created inside the EXPLORER tab. To open the project in a new window, click ‘Yes.’ You will get a notification that the project has been created.
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