Hey,

Just for information: I solved all my problem ny soldering. Don't know if this is the breadboard or the Dupont wire jumpers, but with wires soldered, everything is working now :)

@rejoe2 said in Door sensor make USB disconnect while reading serial output?:

Your problem report also reminds me to problems other users had with their LAN-GW's. For them afaik downgrading the board definition for the nanos (not the IDE) to version <=1.6.11 helped a lot. You might give that a try...

Ok, I don't really understand yet what is the board definition version, but I will try. Thank you :)

Hey there,

How can I know which Arduino Nano are good for MySensors?
Mine are from Banggood and the serial output seems to be chaotic.

I have one from Gravitech and it seems to be ok…

How to choose? In the MySensors store, this is clone form Asia like mine from Banggood…

@hek said in Door sensor make USB disconnect while reading serial output?:

Did you try adding a larger capacitor on the radio?

Yes, but still the same.

I grab another Arduino Nano (not sure it's a guenuine one) and the serial output is correct! The sensor can not find the gateway, but this is another story :)

Do you know why some Arduino Nano V3 "compatible" will not work?

Hello,

I tried with two spares modules and I am still stuck with this curious behaviour.

@sundberg84 I swapped Nano between the gateway and the sensor and this bug always occurs with the sensor sketch. I have spare radio modules, so I will try with another one, thank you for this suggestion ;)

I use the 3v3 output of the Arduino to power the radio module :)

@sundberg84 I use Arduino Nano V3, breadboards and NRF24L01+ with a 4.7 µF capacitor. For debugging, a use USB port from my computer or RaspberryPI. I tried with a USB charger for cellphones, and nothing seems to change (but I am blind without serial :smile: )

About software, I use Arduino IDE v1.8.5 and MySensors v2.1.1.

@rejoe2 said in Door sensor make USB disconnect while reading serial output?:

@guilou First, I can not see the serial output you tried to link, the log parser page remains blank.

That is weird, on my computer all links are ok.

Anyway, I tried to disconnect/reconnect the Arduino without reflashing the sketch, and I have still the same behaviour: the output stops, and at the same time the Arduino change its port…

26773 TSF:MSG:SEND,10-10-255-2550 MCO:BGN:INIT NODE,CP=RNNNA--,VER=2.1.1
41 TSM:INIT
55 TSF:WUR:MS=0
76 TSM:INIT:TSP OK
97 TSM:INIT:STATID=10
119 TSF:SID:OK,ID=10
14

The "14" on a single like lets me think the serial communication is interrupted at this exact point.

I tried other cables and power source without any success.

Hello,

I have two Arduino Nano and I just want to build a domotic system with Home Assistant and MySensors.
So, I build a serial gateway with one Arduino, just by copy/pasting the documentation example. By reading the debug, I think it's quite good.

For the sensor, my code is:

// Enable debug prints to serial monitor
#define MY_DEBUG 
#define MY_BAUD_RATE 9600

// Enable and select radio type attached
#define MY_RADIO_NRF24
//#define MY_RADIO_RFM69

#define MY_NODE_ID 10

#include <SPI.h>
#include <MySensors.h>

#define CHILD_ID 3

const int buttonPin = 3;    // the number of the pushbutton pin
const int ledPin = 13;      // the number of the LED pin

// Variables will change:
int ledState = HIGH;         // the current state of the output pin
int buttonState;             // the current reading from the input pin
int lastButtonState = LOW;   // the previous reading from the input pin

// the following variables are unsigned longs because the time, measured in
// milliseconds, will quickly become a bigger number than can be stored in an int.
unsigned long lastDebounceTime = 0;  // the last time the output pin was toggled
unsigned long debounceDelay = 50;    // the debounce time; increase if the output flickers

MyMessage msg(CHILD_ID, V_TRIPPED);

void setup() {
  pinMode(buttonPin, INPUT);
  pinMode(ledPin, OUTPUT);

  // set initial LED state
  digitalWrite(ledPin, ledState);

  Serial.begin(MY_BAUD_RATE);
}

void presentation() {
  //sendSketchInfo("TestSketch",  "1.0");
  // Register binary input sensor to gw (they will be created as child devices)
  // You can use S_DOOR, S_MOTION or S_LIGHT here depending on your usage. 
  // If S_LIGHT is used, remember to update variable type you send in. See "msg" above.
  present(CHILD_ID, S_DOOR);  
}

void loop() {
  // read the state of the switch into a local variable:
  int reading = digitalRead(buttonPin);

  // check to see if you just pressed the button
  // (i.e. the input went from LOW to HIGH), and you've waited long enough
  // since the last press to ignore any noise:

  // If the switch changed, due to noise or pressing:
  if (reading != lastButtonState) {
    // reset the debouncing timer
    lastDebounceTime = millis();
  }

  if ((millis() - lastDebounceTime) > debounceDelay) {
    // whatever the reading is at, it's been there for longer than the debounce
    // delay, so take it as the actual current state:

    // if the button state has changed:
    if (reading != buttonState) {
      buttonState = reading;

      // only toggle the LED if the new button state is HIGH
      if (buttonState == HIGH) {
        //send(msg.set(buttonState == HIGH ? 1 : 0));
        
        delay(1000);
        ledState = !ledState;
        Serial.print("State = ");
        Serial.println(ledState);
        send(msg.set(ledState));
      }
    }
  }

  // set the LED:
  digitalWrite(ledPin, ledState);

  // save the reading. Next time through the loop, it'll be the lastButtonState:
  lastButtonState = reading;
}

The serial output is like this.

But something weird happens just after this serial reading. The USB seems to be disconnected and then reconnect to another ttyUSB. So I can't read all the serial at once. I tried to lower the baud rate, as you can see, but there is still the bug.

I tried to swap Arduino, change USB port, change USB cable and there is still this strange behaviour.
Do you know why?