Serial communication between teensy 4.1 & other Arduino board??

C

charnjit

Well-known member
I want to use Arduino Nano board or teensy lc to communicate with teensy 4.1 wia tx rx pins. Teensy 4.1 is connected with audio board .
Can I connect Arduino Nano or Teensy lc to teensy 4.1 by (tx pin to rx pin , rx pin to tx pin ,gnd pin to gnd pin directly ) and read and write serial bytes ???? To play audio or Synth.
Like
images.png

Or any risk to connect pins???
 
No. Arduino is 5V. Teensy 4.1 is *NOT* 5V tolerant. You will need to do something to guarantee that the voltage present on any teensy4.1 pin never exceeds 3.3V
 
Teensy LC to T4.1 is ok, they are both 3.3V.
For nano to Teensy LC or 4.1 use an Adum1201 for level shifting (5V to 3.3V). The Adum1201 is designed for Serial Comms level shifting.
It is possible to buy ready made Adum1201 modules. See here and here.
 
So far, I receive Adum 1201 , I will test coding using Teensy LC,
But here, please tell me , which side Arduino should be connected, and which side Teensy 4.1 what pin will go where???
1740756325432.jpg
 
Below is a connection diagram for you.
What follows is an explanation of connections:
VDD refers to the voltage level for a side be it side 1 (A) or side 2 (B).
In the diagram below Side 1 (A) has been chosen for the Teensy and Side 2 (B) for the Nano.
VI refers to an INPUT Voltage to the level converter be it Channel A or Channel B.
VO refers to an OUTPUT Voltage from the level converter be it Channel A or Channel B.
Voltage arriving at Input VIA at VDD2 levels will be converted to an output voltage at VOA at VDD1 levels.
Similarly Voltage arriving at Input VIB at VDD1 levels will be converted to an output voltage at VOB at VDD2 levels.
The Grounds, GND1 and GND2, are the respective Grounds for the Voltages VDD1 and VDD2.
If the grounds are NOT connected together (GND1 to GND2) then the two sides of the circuit are electrically isolated from each other.
z.png
 
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Thank you BriComp,,,,,
If I send midi message from teensy LC using midi library. And want to read them on Teensy 4,1 using midi library to play Synth waveforms.
Can I connect ( teensy LC Gnd to Teensy LC Gnd) and ( teensy LC tx to teensy 4.1 rx) directly??? Or
Do I need 6n138 circuit between them??
 
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