Arduino rf communication

[Aurac]

I want to make 2x arduino talk to each other via rf and using sensors. If 1x arduino detects an obstacle it sends a signal to another arduino to lyt a red lyt, if the first arduino area is clear it sends a signal to the 2x arduino to switch the red lyt to green.

This is to be used in a railway station, were arduino 1 is in the station arduino 2 is on the approach to the station, if 1 has a train then 2 is red, if no train in 1 area then 2 can proceed to station.

I hope that is understandable to you. 

Plz try to help. 

[email protected] 

 

[HarryA1]

If you search on amazon.com for "arduino rf" you will find various transmitter - receiver options. Like this for example>

https://www.amazon.com/WHDTS-Transmitter-Receiver-Transceiver-Communication/dp/B07L8RXSDF/ref=sr_1_36?keywords=arduino+rf&link_code=qs&qid=1574902183&sourceid=Mozilla-search&sr=8-36

for this model note:

• T400 Transmission Distance: 400M
  
• T400 Receiving Distance: 50M
  
• GWB Transmission Distance: 400M
  
• GWB Receiving Distance: 400M
  

I do not see the differences between the T400 and the GWB units when ordering the units.