Communication between 2 arduino's

Projects General Guidance
1

Hey everyone,
How can I communicate between 2 Arduino boards in a wirless way?

2

Radio transceivers. The nRF24L01 is very common. Google will help you find vendors, and tutorials.

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3

For short range, you can try bluetooth modules like HC-05.

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4

For RF24 radios a good starting place is Robin2's simple rf24 tutorial.

For HC05 Bluetooth, search for "Martyn Currie HC05" for information on using HC05 and this page on connecting 2 HC05s: https://howtomechatronics.com/tutorials/arduino/how-to-configure-pair-two-hc-05-bluetooth-module-master-slave-commands/

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5

For medium distances (100-400m) , I think the HC-12 is the best choice

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6

Another alternative, if you just want one way communication, are the cheap 433MHz transmitter and receivers.

How to use the 433MHz transmitter and receiver.

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7

Oh, and while we are at it, if you are using ESP8266 or ESP32 boards, there is ESP-NOW.

Getting started with ESP-NOW.

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