I cannot get serial communication working on Intel Galileo Gen 2. I'm using Serial1 on port /dev/ttyS0 assigned to pin 0 and 1. For testing purposes I created loopback on that serial port (connected RX and TX together). Unfortunately, it seems that nothing works. After few test it seems that my board can receive data, but cannot send any.
void setup() {
Serial.begin(9600);
Serial1.begin(19200);
Serial.println("Ready");
}
void loop() {
while(Serial1.available() > 0) {
Serial.print(Serial1.read());
Serial.print(' ');
}
uint8_t buf[3] = {0xC0, 0xFF, 0xEE};
Serial1.write(buf, 3);
delay(2000);
}
I run same sketch with same configuration on Arduino Yún and it worked well. Where the problem could be? Thanks.
For this particular Galileo board, the baud rate for Serial object is always 115200 baud no matter the argument you give it. Since you connected Serial1 to Serial it could be just a synchronisation error due to different baud rate. Did you try to change this Serial1.begin(19200); to this Serial1.begin(115200); ?
Related
I can't see any Serial.print() outputs in Visual Studio Code from my Arduino device (an ESP8266 in this case). I was expecting to see it on the Debug Console. Do I have something configured incorrectly?
I know my code is working as the LED is flashing but I'm not seeing any output anywhere.
Here's my code:
#include <Arduino.h>
void setup()
{
Serial.begin(9600); // EDIT: added this line
Serial.println("Setup...");
pinMode(LED_BUILTIN, OUTPUT);
}
void loop()
{
Serial.print("On!");
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
Serial.print("Off!");
digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
I am using this board:
https://www.waveshare.com/wiki/e-Paper_ESP8266_Driver_Board
Here is my platformio.ini file:
[env:esp12e]
platform = espressif8266
board = esp12e
framework = arduino
; Custom Serial Monitor port
monitor_port = COM4
; Custom Serial Monitor speed (baud rate)
monitor_speed = 9600
Near the bottom right of the VS Code screen is a little plug icon. Click that to open the serial monitor.
Set serial port baud rate in setup() by adding this code:
Serial.begin(SERIAL_BAUD_RATE);
For example:
Serial.begin(9600);
Finaly in serial port monitor set baud rate
I use Xbee in my project with arduino. I have set up Xbee configuration(i can send massge in xctu serial consol), but i have problems with arduino code. I try to use "SoftwareSerial" library, but it doesn't work properly. For example I send data using Xctu, but Xbee connected to arduino cannot receive data. Can you please help me with receiver and transmiter arduino code? Thank you, in advance.
The code:
#include <SoftwareSerial.h>
#define rxPin 1
#define txPin 0
SoftwareSerial xbee = SoftwareSerial(rxPin, txPin);
void setup(){
xbee.begin(9600);
Serial.begin(9600);
//Serial.println("Starting XBee Comunication");
xbee.listen();
}
void loop(){
if(Serial.available()){
xbee.write(Serial.read());
}
else{
Serial.println("not available");
}
if(xbee.available()){
byte x = xbee.peek();
Serial.println(x);
}
else{
Serial.println("none to read");
}
delay(2000);
//Serial.println(rec);
}
Some quick debugging tips:
Disconnect the XBee and short your TX and RX pins together. Make sure you read back what you send.
Are you sure you have the TX and RX pins connected to the XBee module correctly? TX out of the Arduino goes to RX of the XBee and vice versa.
Have you powered the XBee module correctly? XCTU should have support for finding nodes on the network and interacting with them. Make sure the module is powered up and responding on the network.
connection:
USB to TTL interface modules four pins:
1)0v-volt of avr
2)vcc-5 volt avr
3)TXD-TX of avr
4)RXD-RX of avr
and the USB to TTL serial interface module connected to PC using USB to RS-232 convertor DB9 cable.
below is the code:
#include<avr/io.h>
void UART_transmit(unsigned char data);
int main(void)
{
unsigned char i,message[]="i love india\r\n";
DDRD=0x00;
PORTD=0xFF;
UCSRA=0;
UCSRB=1<<TXEN; // transmitter enable
UCSRC=1<<URSEL | 1<<UCSZ1 | 1<<UCSZ0; // 8 data bit, a stop, none parity
UBRRH=0;
UBRRL=5; // for 9600 baud at 1MHz
while(1)
{
for(i=0;message[i];i++)
{
UART_transmit(message[i]);
}
} // while(1) end
} // main() end
void UART_transmit(unsigned char data)
{
while(!(UCSRA & (1<<UDRE)));
UDR=data;
}
RX of each device must be connected to TX of the other, and vice versa, unless you are using a null modem cable, in which case your connections are correct. You might try using a multimeter and google to determine if your connecting cable is straight or null-modem.
I also recommend that you revise your code as outlined in the manufacturer's application note AVR306: Using the AVR® UART in C. This is the authoritative reference on setting up and using the UART on AVR microcontrollers.
Before you mark this question as duplicate, please note that I have already tried this, this & this
I bought an Arduino UNO R3 & a SIM808 GSM/GPS shield recently. The RX of the Shield is connected to Pin 11 of Arduino, TX to Pin 10 with both the GNDs connected to each other. I have connected my Arduino to my computer with the USB & the shield is connected to an external power supply with a 12V Adapter. Additionally, I have connected the 3.3V of the Arduino to Vcc of the shield.
Following is the sketch I have used:
// Include the GSM library
#include <GSM.h>
#define PINNUMBER ""
// initialize the library instance
GSM gsmAccess;
GSM_SMS sms;
void setup() {
// initialize serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.println("SMS Messages Sender");
// connection state
boolean notConnected = true;
// Start GSM shield
// If your SIM has PIN, pass it as a parameter of begin() in quotes
while (notConnected) {
if (gsmAccess.begin(PINNUMBER) == GSM_READY) {
notConnected = false;
} else {
Serial.println("Not connected");
delay(1000);
}
}
Serial.println("GSM initialized");
}
void loop() {
Serial.print("Enter a mobile number: ");
char remoteNum[20]; // telephone number to send sms
readSerial(remoteNum);
Serial.println(remoteNum);
// sms text
Serial.print("Now, enter SMS content: ");
char txtMsg[200];
readSerial(txtMsg);
Serial.println("SENDING");
Serial.println();
Serial.println("Message:");
Serial.println(txtMsg);
// send the message
sms.beginSMS(remoteNum);
sms.print(txtMsg);
sms.endSMS();
Serial.println("\nCOMPLETE!\n");
}
/*
Read input serial
*/
int readSerial(char result[]) {
int i = 0;
while (1) {
while (Serial.available() > 0) {
char inChar = Serial.read();
if (inChar == '\n') {
result[i] = '\0';
Serial.flush();
return 0;
}
if (inChar != '\r') {
result[i] = inChar;
i++;
}
}
}
}
Problem here is same as that mentioned in those linked posts.
The condition if (gsmAccess.begin(PINNUMBER) == GSM_READY) never gets executed. Neither does the else part execute.
Serial monitor never goes past SMS Messages Sender.
Please note that I am using AirTel India, I have a fully activated Data Plan & the PIN Number has been changed to 0000.
Would really appreciate if someone could suggest something helpful.
Thanks for your time!!
You cannot power a GSM module from the 3.3V of Arduino! a GSM needs peak currents of 3A (yes, Amps, not milli-amperes). You really need a LiPo battery to power the GSM. You could power a 3V Arduino from the same LiPo battery, actually, if you need a mobile solution, but not the other way around.
Please first check if the module responds with the next code Example Code
Other thing the Supply voltage range must be 3.4 ~ 4.4V, try not using less voltage .
The GSM library of the Arduino is for the Quectel M10 GSM/GPRS module and is not compatible with SimCom SIMxxx modules.
Here is the library that you can use for your SIM808 module https://github.com/MarcoMartines/GSM-GPRS-GPS-Shield (examples included in the repo). Note that this library uses the SIM900 library which allows low level interface with SimCom modules.
For further reading here two adafruit links:
http://wiki.iteadstudio.com/SIM808_GSM/GPRS/GPS_Module
https://www.adafruit.com/products/2637
the shield is connected to an external power supply with a 12V
Adapter. Additionally, I have connected the 3.3V of the Arduino to Vcc
of the shield.
What do you mean by that? You need to supply your shield with the required voltage that can deliver the required amps. And also you need to have a common ground with your arduino.
In addition, if your shield is a 3.3V you need to shift Tx line comming from arduino as well (because it's a 5V) using a voltage divider.
Note that these shields have also a soft power-up button that needs to be connected as well, to allow the code to power up your module.
have really been suffering with my simulation! Tried connecting my arduino mega 2560 to COMPIM (used as GSM Module) in my circuit and also loaded sample code but damn! In vain! I wanted to view the data sent in virtual terminal but am getting nothing! and its also complaining of excessive CPU usage.
And thereafter, the messages are displayed as shown below.
Someone please help me out. Am I making a mistake oh? Infact the arduino code for displaying in the simulation is also giving me hard time. The one am using is as shown below.
#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11); // RX, TX
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
Serial.println("Goodnight moon!");
// set the data rate for the SoftwareSerial port
mySerial.begin(9600);
mySerial.println("Hello, world?");
}
void loop() // run over and over
{
if (mySerial.available())
mySerial.println("Hello, world?");
if (Serial.available())
mySerial.println("Hello, world?");
}
Will b every grateful for any help offered.