- #Esp8266 serial port mac how to#
- #Esp8266 serial port mac serial number#
- #Esp8266 serial port mac full#
Just to confirm what was explained in the introduction section, we can check if the first 24 bits of the MAC correspond to the manufacturer of the ESP8266, which is Espressif. You should get something similar to figure 1.įigure 1 – Output of the function to get the MAC of the ESP8266. To test the code, just upload it to the ESP8266 and open the Arduino IDE console.
#Esp8266 serial port mac full#
You can check the full working code bellow, which also includes the empty loop function. What serial adapter does your ESP8266 board use Probably a CH340G or CP2102 - look for a chip with those markings near the USB port, then google your operating system version, that part number, and the word drivers. To get the MAC dress of the ESP8266, we simply call the macAdress method on the WiFi global variable, which will return the MAC address in the hexadecimal format mentioned early. Then, in our setup function, we open the serial port, so we can print the output of our program. Since we only want to print the MAC, we will do all the coding on the setup function and leave the main loop empty.įirst, we include the ESP8266WiFi library, which we typically use to access all the functionality needed for the ESP8266 to connect to a WiFi network. The code for this tutorial is very simple, since we already have a function to get the MAC of the ESP8266. The tests were performed using a NodeMCU board, a very cheap and easy to use ESP8266 board. You can read more about MAC addresses here.
#Esp8266 serial port mac serial number#
The first 24 bits of the MAC are the identifier number of the manufacturer and the second 24 bits are a serial number assigned by the manufacturer. In terms of format, MAC addresses are 48-bit in length and typically represented in hexadecimal format, with each two hexadecimal digits separated by “:”. Taking in consideration the OSI model, MAC addressing works at a layer (layer 2) lower than IP addressing (layer 3). So, MAC addresses are hardware addresses that uniquely identify a network adapter. Since there aren’t any ESP8266 template for Eagle, I end up using inDesign to create my traces. You use it the same way as the Serial class. For the secondary port, a new serial class called Serial1 has been created. For other types of images, consult your SDK documentation to. When generating ESP8266 version 1 images, the file names created by elf2image include the flash offsets as part of the file name. The next arguments to writeflash are one or more pairs of offset (address) and file name. But, just as a quick explanation, the MAC address is a unique value associated with a network adapter. To use the primary serial port, use the class Serial as usual. The -port argument is documented under Serial Port.
#Esp8266 serial port mac how to#
The objective of this short post is to explain how to get the MAC address of the ESP8266.Įxplaining in detail what is a MAC address is outside of the scope of this post.