One ESP32/E220 (gateway) and two ESP32/E220 (Endpoints/Sensors)

I'm studying the forum tutorials about EBYTE modules (thanks Renzo for the tutorials). How to configure One ESP32/E220 (gateway) to receive sensor readings from Two ESP32/E220 (endpoint) sent every 5 minutes? Is it necessary to make some code to avoid collision of messages sent by the ESP32/E220 (endpoint) to the ESP32/E220 (gateway)? The examples I've seen on the internet only show examples with expensive commercial gateways to accomplish this task. Thank you so much