Uno/Nano Every Serial Communication Issue

Hi,

I need help with serial communication using when using a Nano Every.

I’ve written two simple programs to communicate using serial hardware between two Arduinos. Initially two Arduino Unos were used with Uno1 set up as a master and Uno2 set as a slave. The master sends either a 0 or 1 to the slave. if the slave receives a 0, a LED turns off. If the slave receives a 1, a LED turns on. When using two Unos, everything works correctly. When using a Nano Every as the master and Uno as the slave, the LED never turns on. Why?

6 pictures are attached showing the hardware used and explaining the wiring. Picture 1-5 show the Uno and Nano Every hardware. Picture 6 shows the Uno and Uno hardware.

When code is uploaded to a Uno, the upload sequence end cleanly–no errors.
When code is uploaded to the Nano Every, the following error is reported (see attachment picture 7): avrdude: jtagmkII_initialize(): Cannot locate “flash” and “boot” memories in description

Any help would be greatly appreciated.

Code
Program: SerialMaster

/*
SerialMaster
*/

void setup() {
Serial.begin(9600);
//wait for serial port to connect.
while(!Serial) { ; }
//printing data so I know the code works to this point
Serial.println("");
Serial.println(“Master Starting”);
Serial.println(“New Code 8”);
}

void loop() {
Serial.print(1); //send 1 to slave
delay(1000);
Serial.print(0); //send 0 to slave
delay(1000);
}

Program: SerialSlave

/*
SerialSlave
*/

char c = ’ ';
byte LED = 2;

void setup() {
pinMode(LED, OUTPUT);
Serial.begin(9600);
//printing data so I know the code works to this point
Serial.println("");
Serial.println(“Slave Starting”);
Serial.println(“Cycling to read serial data. Rev. 3”);
}

void loop() {
if(Serial.available())
{
char c = Serial.read(); // read serial data
if (c==‘0’) {digitalWrite(LED, LOW); } // turn on LED if serial data received = 0
if (c==‘1’) {digitalWrite(LED, HIGH); } // turn off LED if serial data received = 1
Serial.println(c);
}
}

Picture 1.JPG

Picture 2JPG.JPG

Picture 3.JPG

Picture 4.JPG

Picture 5.JPG

Picture 6.jpg

Hello Boilermaker,

I think the issue you might be having is that the Nano Every/33's RX/TX pin's are linked to Serial1 not Serial.

Serial is the USB port only.

Please refer to: https://www.arduino.cc/en/Guide/NANOEvery for further details. Specifically under the header: Serial ports on the Arduino NANO Every

As for the error, I am not sure as I don't get that when I compile your master code!

Hope that helps,
Matt

Boilermaker:
the following error is reported (see attachment picture 7): avrdude: jtagmkII_initialize(): Cannot locate "flash" and "boot" memories in description

That is a warning, not an error. This warning is normal, expected, and doesn’t indicate any problem. Please ignore it.

Matt,

Thank you for the advice. That solve the problem. Much appreciated.

Regards,
Boilermaker

Pert,

Thank you for the reply regarding the error. Nice to know it is a warning and to be ignored.

Regards,
Boilermaker