8/3/2023 0 Comments Packet sender tutorial![]() This is a function that will be executed when a message is received. Register for a receive callback function ( OnDataRecv).On the receiver side, the sketch should include: For this, you need to know the the receiver MAC address This can tell us if the message was successfully delivered or not Register a callback function upon sending data – the OnDataSent function will be executed when a message is sent.Here’s what we should include in the sender sketch: Then, you can modify the structure to send whichever variable types are suitable for your project (like sensor readings, or boolean variables to turn something on or off).įor better understanding we’ll call “sender” to ESP8266 #1 and “receiver” to ESP8266 #2. We’ll send a structure that contains a variable of type char, int, float, String and boolean. The MAC address should be printed as follows: Serial.print("ESP8266 Board MAC Address: ") Īfter uploading the code, open the Serial Monitor at a baud rate of 115200 and press the ESP8266 RESET button. Complete Instructions to Get and Change ESP MAC Address: To get your board’s MAC Address, upload the following code. That’s how you know to which device you’ll send the information to.Įach ESP8266 has a unique MAC Address and that’s how we identify each board to send data to it using ESP-NOW (learn how to Get and Change the ESP8266 MAC Address). To communicate via ESP-NOW, you need to know the MAC Address of the ESP8266 receiver. In summary, ESP-NOW is ideal to build a network in which you can have several ESP8266 boards exchanging data with each other. ![]() ![]()
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