# Make led blink using two nrf24l01

**URL:** <https://forum.arduino.cc/t/make-led-blink-using-two-nrf24l01/998035>\
**Category:** General Guidance\
**Created:** [June 1, 2022, 12:50am UTC](https://forum.arduino.cc/t/make-led-blink-using-two-nrf24l01/998035 "2022-06-01T00:50:45Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![projectflash21](https://avatars.discourse-cdn.com/v4/letter/p/f19dbf/32.png) [@projectflash21](https://forum.arduino.cc/u/projectflash21)\
**Post date:** [June 1, 2022, 12:50am UTC](https://forum.arduino.cc/t/make-led-blink-using-two-nrf24l01/998035/1 "2022-06-01T00:50:45Z")

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Hi,

Is it possible to write a code that allows one arduino nano with a lcd screen, button and nrf24l01 to send a command to another arduino nano, nrf24l01 with a led to make the led flash for duration of time?

I reason for this is for the one module with the blinking led to be a visual indicator that both modules are connected.

Any help/advise would be grateful. Thank you

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**Author:** ![Railroader](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/railroader/32/274550_2.png) [@Railroader](https://forum.arduino.cc/u/Railroader)\
**Post date:** [June 1, 2022, 1:03am UTC](https://forum.arduino.cc/t/make-led-blink-using-two-nrf24l01/998035/2 "2022-06-01T01:03:20Z")

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> [@projectflash21](#):
>
> Is it possible

It sure is. Just don't have a too large distans between the 2 units.

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**Author:** ![groundFungus](https://avatars.discourse-cdn.com/v4/letter/g/73ab20/32.png) [@groundFungus](https://forum.arduino.cc/u/groundFungus)\
**Post date:** [June 1, 2022, 1:36am UTC](https://forum.arduino.cc/t/make-led-blink-using-two-nrf24l01/998035/3 "2022-06-01T01:36:09Z")

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The hardest part is getting the radios to communicate. [Robin2's simple rf24 tutorial](https://forum.arduino.cc/t/simple-nrf24l01-2-4ghz-transceiver-demo/405123) is a good starting point.

Google "arduino led rf24" to see how others have done that.

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**Author:** ![projectflash21](https://avatars.discourse-cdn.com/v4/letter/p/f19dbf/32.png) [@projectflash21](https://forum.arduino.cc/u/projectflash21)\
**Post date:** [June 1, 2022, 5:32am UTC](https://forum.arduino.cc/t/make-led-blink-using-two-nrf24l01/998035/4 "2022-06-01T05:32:34Z")

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I've already got the radios communicating so that's not a issue.

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**Author:** ![xl97](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/xl97/32/213707_2.png) [@xl97](https://forum.arduino.cc/u/xl97)\
**Post date:** [June 1, 2022, 7:51pm UTC](https://forum.arduino.cc/t/make-led-blink-using-two-nrf24l01/998035/5 "2022-06-01T19:51:31Z")

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So whats the problem? (am I missing something here?)

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**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\
**Post date:** [November 28, 2022, 7:52pm UTC](https://forum.arduino.cc/t/make-led-blink-using-two-nrf24l01/998035/6 "2022-11-28T19:52:26Z")

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