How to connect one arduino uno to many arduino nano?

Question

Arduino

Hello, there are arduino nano boards to which ds18b20 temperature sensors are connected - one board one sensor. And the temperature data needs to be sent to the Arduino Uno main board for further processing. But it has to be done wirelessly. Is it possible to connect many nano boards to one uno, and if so, how?

Answer 1

You can connect. If without wires, then radio modules are needed. It can be the cheapest at 433MHz, it can be popular nrf24l01, it can be long-range lora. In any case, the module is selected according to its characteristics, such as transmission speed, frequency, distance, number of controller legs, etc. Next, see how to work with the selected module.

Answer 2

You can link in any way. If it's a wired connection, then SPI, I2C, Serial, etc. If wireless connection, then radio modules. For the communication to work correctly, you need to organize your own protocol. You can look here to study the issue.