What software do I need for this...?

Which software is used to make simple circuit diagram like

The software to make that is called Fritzing, and it is almost universally hated on this forum. It is not a circuit diagram it is a physical layout diagram, and of not very great use.

Please do not hijack some one else's thread, in future, please start your own thread.

@mrnams ,

Topic split from another topic. Please do not add your own questions to the end of other people's topics.

Could you take a few moments to Learn How To Use The Forum

It will help you get the best out of the forum in the future.

Thank you.

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Hello mrnams

Welcome to the worldbest Arduino forum ever.

This is a nice project to get started.

Keep it simple and stupid firstly.
Follow the example code that comes with the library or
run some tutorials for the hardware selected.
If you are happy with the results of the tutorials you can merge these to your project.

Have a nice day and enjoy coding in C++.

The TX/RX lines are crossed :upside_down_face:

It depends on how the two units are classified. They could be DTE or DCE, and that changes if the TX terminal is an output or input.

The voltage divider is on the 5V RX pin.

Ohh sorry guys, will start new thread for each question now onward

To be clear:

Never add your own question to a topic started be someone else, however similar your question is to theirs. For your own question start your own topic. If you think it relevant you can put a link in your question to the related topic.

If you have a series of questions about one subject or topic then keep them in one long running topic that you created.

If in doubt, ask.

thanks,noted

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I hope my question already separated out, here is update from my side
I found "Cirkit Designer" as good circuit designer software, it is in development stage and they have planned for simulation as well, sharing official link.
https://www.cirkitstudio.com/

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