Can I send a signal out on a TX Pin (1) to several Arduino modules to be received on the RX pins (0) at the same time?
For example pin (1) of arduino #1 connected to Pin (0) of 6 Arduinos #2-7
What I want to do is control several Uno Modules with one Uno Module.
The communication is one way, the 6 module will only receive and the one will only transmit
Do I need to do anything to isolate them or can I just have them all connected?
thank you
Can I send a signal out on a TX Pin (1) to several Arduino modules to be received on the RX pins (0) at the same time?
For example pin (1) of arduino #1 connected to Pin (0) of 6 Arduinos #2-7
What I want to do is control several Uno Modules with one Uno Module.
The communication is one way, the 6 modules will only receive and the one will only transmit The TX pins of the receiving Uno Modules are not connected to anything as they only receive.
Do I need to do anything to isolate them or can I just have them all connected?
thank you
Only 4 are shown to simplify drawing
A TX pin can be connected to any number of RX pins. All modules must connect to a common Gnd line.
Yes, you can connect them all. Don't forget to connect all the GND as well.
The Arduino Uno uses pin 0 and 1 to upload a sketch and for the serial monitor.
If you use the Arduino Leonardo or Arduino (Pro) Micro, then pin 0 and 1 are called "Serial1" and are free to use.
With the Unos, if the required baud rate is 38400 or less you could use software serial ports and free up the hardware ports for sketch upload and debugging with serial prints.
@OP: Do not cross-post! (Connect TX to multiple RX?? - Project Guidance - Arduino Forum)
Koepel:
Yes, you can connect them all. Don't forget to connect all the GND as well.
thank you
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