I have written some serial code which justs outputs 'X'. Using the arduinos IdE Serial monitor I can view this very nicely.
I can not view this data on hyperserialterminal though, what could be the issue?
be sure tho choose the correct serial port, that nothing else is using that serial port (like serial monitor), to choose the matching baudrate and that other options are right (8n1)
The Arduino Micro requires the DTR and RTS pin of the comport to be ON, something the Arduino monitor does!
Hence with my serial interface i had to set the DTR and RTS ON, to beable to receive!
The issue is Out put of the Arduino pins of serial monitor are TTL output. If you use USB to TTL output can connect to tx and Rx pins . Then only you can see the terminal window.
Also check The Ground pins. aLSO PASTE YOUR CODE WHAT YOUR ARE TRYING TO PRINT
Related
Arduino will reset when DTR signal go Low usually happen when we connect to Serial port.
But when I write code in python using module serial.tools.list_ports. Arduino alway reset when I check for available port except I use Arduino port in other program.
Here my code.
def serial_ports():
return [p.device for p in serial.tools.list_ports.comports(include_links=True)]
Why I happen and how to stop it?
As you have correctly mentioned that
Arduino will reset when the DTR signal goes Low, usually happens when we connect to Serial port.
You might try connecting a 100 Ohm resistor between the 5V pin and the reset pin to stop reset signal going low with the DTR signal.
I have designed a ledstrip driver capable of receiving commands over UDP-IP. I initially worked with an Arduino MEGA, and currently I'm in the process of deploying the code in an Arduino NANO.
The Arduino NANO only has one hardware serial interface, unlike the MEGA, which has several. This forces me to disable the usual debugging through one of the Serial ports (by sending strings to the computer) and to reserve the one and only serial interface for the ESP8266. In short, I am connecting the ESP8266 to the TX and RX pins in the NANO.
I am aware that I could use the softwareserial.h library, but I'd like to avoid it if possible.
The following function sets up the Wifi object:
void wifi_setup(){
// Initialize serial for ESP module
Serial.begin(9600);
// Initialize ESP module
WiFi.init(&Serial); /* GETS STUCK HERE */
...
}
The problem is: the microcontroller gets stuck in the Wifi.init() function and never abandons it.
I am aware that the serial interface is connected to the USB port, and am suspicious this might be a problem. However, I have tried giving power to the NANO through the VIN pin instead of through the USB port, and it hasn't worked.
What am I doing wrong?
The best solution will be to write separate code for ESP8266 and Arduino Nano - or even only for ESP8266 (NodeMCU to make it easy). It will be much easier. But if you really want to do it in your way, i think ESP uses 115200 baud, and you've set it to 9600.
I'm trying to write a simple code that sends a string to an xbee and one that sends the string back, I was able to do this with XCTU via console, but I want my arduino to send the string.
I was able to use a simple code that read my output from the serial monitor and sends it to an xbee connected via usb adapter, the problem is that I now wrote the code so it sends a predefined string like in the screenshot, but when I write into the monitor it still sends whatever I wrote instead of the static string. I'm also unable to read what I type into the xbee console from XCTU.
I'd love any assistance in this, I've tried uploading and resetting everything to no avail.
Screenshot of problem with the current code of the arduino on the left
You said you were using an Arduino to try to communicate with your XBee Zigbee module.
One thing you have to check is the connection between the TX and RX signals on the Arduino side and on the XBee Zigbee side.
I've helped someone on another forum who used this Seed Studio XBee shield :
If you look at the schematics of this shield, the XBee 'DOut' signal (Tx) is wired to the XB_TX line which can be connected to any of the AJ2 pin with a jumper.
Now on the Arduino side :
On this extract of the Arduino schematics, we can see that the ATMEGA UART has it's RX signal connected to pin 2 of the CPU which is wired to the IOL (AJ2) pin 0.
So, that means that on this shield, the jumper have to be placed between XB_TX and pin 0 of AJ2 to connect the XBee transmission signal (output) to the ATMEGA reception signal (input) [and also XB_RX have to be connected pin 1 of AJ2].
As you didn't mention what kind of shield you were using, you have to double check this point which is a common issue when using serial communication.
In a general way, ALWAYS connect 1 output to N input (except open-drain or open-collector outputs which can be connected together to make a wired OR but which finally have to be connected to N inputs)
Hope this helps
Best regards
From what I can tell on the documentation Xbee "hijacks" the serial system. Instead try blinking an LED to confirm data is being received and sent.
documentation
I just start a project which is very basic actually. But I need an information. It is about arduino serial communication. Here is the question.
If I connect arduino to computer using TTL to RS232 converter without USB cable then can I still use serial monitor to get some data or what happens ? Assume arduino is programmed before using usb cable, and it is powered externally when usb is not used.
for instance the code just
Serial.println("It is working");
delay(1000);
Thansk a lot.
you will fry it. Standard RS232 use a +-12V level, while arduino use TTL level (0-5V), so you still need a RS232 -> RS232TTL converter. If you use it, then using virtual serial over USB or real hardware serial is exactly the same, except that hardware serial port never appear/disappear when you plug in the arduino (there is not something like plug'n'play in rs232, it is always plugged)
I was using Arduino Uno to build a robot, but suddenly this error (stk500_getsync(): not in sync: resp=0x00) occurred. I tried a lot, searched on the net, to fix this error, but no solution worked for me. At last I bough 2 new Arduinos. But each of those 2 Arduinos ran few days correctly and after a few days gave the same error.
I was, and am, unable to find what causes this error. Can anyone kindly tell what could be the mistake I may be doing?
This has happened when the COM port is not correctly selected. Determine the COM port used to communicate with Arduino and set in in the IDE, then recompile the sketch.
I just found the reason from this link
of this error.
There are a TON of pages out there on how to solve this error. The problem is none of them worked for me. The typical solutions range from not having the correct serial port or correct Arduino model board selected under the Tools menu in the Arduino software, to not having a driver (or the correct driver) loaded.
However, the frustating part for me is I KNEW I had the correct serial port and board and driver selected because I was getting output from a sketch scrolling in the Serial Monitor window via a USB connection.
The fix? DISCONNECT ANY WIRES going to pin 0 (RX) while you do the upload. The sketch upload function uses the RX pin.
NOTE: You also need to disconnect any wires going to pin 0 (RX) if you have a sketch with a Serial.read() or Serial.peek() statement, and you want to use the Serial Monitor input field (as shown using the '752' in the example below) to feed data into the running sketch. If you don't disconnect pin 0 it will appear as if your data was entered into your sketch but nothing will happen because the data never truly gets input.
It's looks like there is no connection between PC and Arduino. Possible reasons: Something wrong with USB port OR driver, USB wire, ATMega16 controller, ATMega328 UART or bootloader. First, try to check, if data from Serial Port reaches Arduino. Pull ATMEGA from socket, short-circuit pins RX and TX on Arduino board (pins 0 and 1), and send some data from PC. You should receive exactly same string, as you sent. Also you should se RX TX LED's blinking. If you can't see data back, check if serial port you are using are actually exist in device manager, try to play with it's settings (speed, port numer), try to use another USB port and cable, etc.
I was having the same issue. But for me no led was lighting up on connection and the error observed was the same as yours. I fixed this by changing jumper pin configuration from ext to usb . You can try the same settings by altering the jumper pins between power jack and usb jack.