Arduino Mega Introduction: The Arduino Mega is a microcontroller board based on the ATmega1280 (datasheet). It has 54 digital input/output pins (of which 14 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. How to interface a GPS module (NEO-6M) with Arduino Mega. The data for longitude and latitude is displayed on the serial monitor. The Global Positioning System (GPS) is a satellite-based navigation system made up of at least 24 satellites. GPS works in any weather conditions, anywhere in the world.
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I'm using an Arduino Micro. When I use 'Serial.write' etc with the Arduino's IDE serial monitor everything is working fine.
However when I try to read or send data via 'Serial1', I get nothing. 'Serial1' is suppose to use 0 and 1 RX,TX respectively.
Do I need to connect these pins through a USB converter or are they connected on the boards USB converter?
Here is the code:
101
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user3194881user3194881
9 Answers
The only serial port connected to the USB that the serial monitor can read from is Serial.
Serial1, Serial2, and Serial3 are all logic level serial and will not show up on the Arduino serial monitor.
If you want to see the output from these on your computer,it will require extra hardware.
EugeneEugene
Serial is the only serial port connected to USB. So serial monitor can access only that port. If you need Serial1 or Serial2 to be accessed by serial monitor, then you should use 'USB to TTL Serial Cable' and connect this to RX and TX pins of the arduino's Serial1 port.Please visit link for USB to TTL Serial Cable, enter link description here
jithinmdasjithinmdas
'Serial1' in Arduino Micro is Physically connected to TX and RX pins (TTL), 'Serial' is just a 'virtual port' which you can read using Arduino IDE's Serial Monitor, thats why arduino micro is little different from another such as nano or pro mini.
if you use Serial and Serial1 you can aproach this advantage and upload code using USB and make a connection thought bluetooth (using HC06 connected to physical pins) without disconnect the USB cable and powered both devices (micro and bluetooth).
If you can't upload code to your micro sometimes, press micro's reset button then release it and press upload button in Arduino IDE's.'virtual port' sometimes needs to restart and connect using USB.
This is from Arduino's Documentation Website:
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'..Serial: 0 (RX) and 1 (TX). Used to receive (RX) and transmit (TX) TTL serial data using the ATmega32U4 hardware serial capability. Note that on the Micro, the Serial class refers to USB (CDC) communication; for TTL serial on pins 0 and 1, use the Serial1 class. '
Miguel MuñizMiguel Muñiz
You said it right, Serial1 is the RX and TX pin, while Serial is a virtual interface between computer and Arduino. I have used the TX and RX pins for a wireless module, and if you NEED to use Serial1, it would have to occupy pins 0 and 1, and switch from DLINE to UART on your board.
jyongcjyongc
Open serial monitor with the icon placed in right corner of Arduino IDE. It will be available if you connect the Arduino with PC.
user3647272user3647272
When you open the Arduino IDE write this code block
T9500 / T9550 / T9650Safety and General InformationControl ButtonsKEM-PK14190-70Important Information on Safe and Efficient OperationRead This Information Before Using Your Radio.The information provided in this document supersedes the general safety information in user guides published prior to December 1, 2002.Transmit and Receive Procedure Your two-way radio contains a transmitter and a receiver. Motorola radio manuals.
Select the arduino 9600 port and write something. If you get your written text your arduino is ready from serial comminicate.
Muhammed AlmazMuhammed Almaz
Make sure you go to tool/board: and select Arduino Mega (or other board with multiply serial ports) or it won't work, because the Uno only has one Serial communication port (aka The TX and RX pins on pins on 1 and 0)! Write 1,2 or 3 depending on what TX and RX pins you are using on the Board. The mega has a whole set of extra pins for Serial 1,2 and 3, for example:
Arduino Uno (etc):
Arduino Mega:
or
or
techsettechset
You have to define Serial1 by using SoftwareSerial class from SoftwareSerial library ,Google and download the library :
the code should be something like this :
Mohammad JbberMohammad Jbber
![]() Serial1 is the wrong class for pin 0 and pin 1. You should use Serial class.
Do I need to connect these pins through a USB converter or are they connected on the boards USB converter?
It makes no difference for Serial class.
Mathieu Borderé
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Ercan ErsoyErcan Ersoy
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Hello!
We have an xBee Pro S2C that is using this library very well on a Software Serial connection to ports 2 and 3 on an Arduino Uno. However, when we take the same setup and try it on a Arduino Mega 2560 using any of the ports specified here:
https://www.arduino.cc/en/Reference/SoftwareSerial
Not all pins on the Mega and Mega 2560 support change interrupts, so only the following can be used for RX: 10, 11, 12, 13, 14, 15, 50, 51, 52, 53, A8 (62), A9 (63), A10 (64), A11 (65), A12 (66), A13 (67), A14 (68), A15 (69).
We cannot get this setup to work on the Arduino Mega 2560. We did not try every combination of these ports but tried most of them and it continues to fail. We can get successful packets on an Uno on pins 2 and 3.
Code is as follows:
Mega Software Download
`#include 'Arduino.h'
#include 'XBee.h' #include <SoftwareSerial.h> #define IS_STAR 0 #if IS_STAR #define rxPin 10 //input #define txPin 11 //output #else #define rxPin 2 //input #define txPin 3 //output #endif #include 'SoftReset.h'
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///setup xbee object
XBee xbee = XBee();
SoftwareSerial xBeeSerial = SoftwareSerial(rxPin, txPin);
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//Setting up class & contructors Arduino Mega Serial Pins
Laser::Laser () {
Mega 2560 Software
Any thoughts as to what changes would need to be made to this library in order to run on a Mega if any?
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