Questions tagged [serial]
Serial communication is the standard USB connection between the Arduino and a computer with a standard USB A to B cable or through the TX/RX pins using a USB to serial converter. It can also refer to the serial library.
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Arduino to Arduino communication
When I send data to an Arduino Uno via the serial monitor, the serial data goes down the same USB cable used to program the Arduino. So there must be a device on the Arduino board like a FTDI or USB-...
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Wolfram Mathematica reads but closes stream feeds from Arduino Serial port after a few data sets
This is a Wolfram Mathematica / Arduino serial feed problem , but I am posting here just in for any suggestions on enhancing the Arduino code or the Mathematica notebook. The original post is here ...
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HC-05 won't connect to phone [closed]
I have an HC-05 and I can pair with it but I can not connect to it.
I tried connecting with other phones but is the same with other phones. I try to connect to my PC but it can't find it.
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Can Arduino read serial being sent over by Processing? [closed]
I am trying to control a robot remotely using an Xbox remote. The Xbox remote connects great with processing, specifically using this project https://www.makeuseof.com/tag/arduino-robot-game-...
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1
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convert string representing a binary number to binary
I have a serial input "1111111" and I would like to convert this to a binary B1111111 that I can send to a led matrix.
I tried to search, but, all the results were misleading, led to full ...
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Arduino Uno RFID-RC522 won't scan any card or tag
So I bought a RFID-RC522 module with a blue tag and a white card, and I searched for tutorials and found this library that I used it.
and here is my code :
#include <MFRC522.h>
#include <SPI....
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1
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Read byte and time into EEPROM, then display with a comma between the time and the value?
I have bytes of natural numbers 1-60 coming in at random times:
Example of send data
// Uno send
void setup() {
Serial.begin(9600);
int integersToSend[] = {1, 22, 30, 4, 50};
for (int i = 0; ...
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1
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Reading a string from the serial port and comparing to another string
I'm using an Arduino Mega 2560 and writing a really simple piece of code that doesn't work.
String a, letra;
#define led 13
void setup() {
Serial.begin(9600); // opens serial port, sets data rate ...
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1
answer
41
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ArduinoJson reading `null` from Serial
I have a setup that reads from serial when I sense that there is something to be read (and always assume that what is sent to the arduino is valid json):
void setup(){
Serial.begin(9600);
...
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1
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Serial does not read buffer with integer characters greater than 43
I'm trying to write a script to move an object coupled to a linear axis through a stepper motor. The user must send information such as the length to be moved, the speed of movement, the direction of ...
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1
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Lilypad sends corrupted data on Serial
I have an Arduino Lilypad with this simple code where I try to write a simple message to the serial console. The baud rate is set to 9600 both in the code as well as in the serial console and I'm ...
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Makerfabs Maduino Zero 4G LTE - SIM7600 Serial1 does not reply to AT commands
I am using the following sketch to test this board.
// Description: input AT commands via serial monitor to learn how to use 4G module
// version:v1.0
// Author:Vincent
// web: http://www.makerfabs....
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1
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Make my Arduino (Mega or whatever is better for the task) to be able to read and write `Serial` data to a **rj45** port
I have a Chinese hybrid solar inverter that exposes an rj45 input which talks the serial protocol (Baud rate 2400, no parity, 8 bits, 1 stop bit). I need my Arduino (say, Mega or whatever, does not ...
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Why are the UART ports not working on my Portenta breakout Board?
I am using a Portenta Arduino Breakout Board (https://store.arduino.cc/products/arduino-portenta-breakout) that is connected to the Portenta H7 (https://store.arduino.cc/products/portenta-h7) for a ...
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I have a cash counter with RS232 in the back of it, I want to read the data that supposed displayed on the projector
I have cash counter with RS232 in the back of it. I want to read the data that supposed displayed on the projector with RS232 to TTL convertor and arduino.
Here is all my setup
Now I
Connect the ...
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0
answers
48
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Arduino MKRZero "This device cannot start" (Code 10), and Keyboard.h
I have bought my brand new Arduino MKRZero to emulate a keyboard. When I plug it in, I get the following on COM6, which is listed as "Arduino MKRZero".
"This device cannot start" (...
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1
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How to fix UnicodeDecodeError when using Serial.println
I am using an Arduino Uno R3 to send instructions to a serial monitor in a Python program with Serial.println. But when I send a specific line, I get a a UnicodeDecodeError.
The line in the Arduino ...
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0
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Slow I2C communication
To collect temperature and BPM, I connected a max30101 in my Heltec WiFi kit V3 with ESP32. The data collected are stored in arrays to extract statistical features from signals which an algorithm will ...
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1
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Why this simple serial monitor code not working?
The follwoing code echoes whatever arduino recieves through reciever pin. The idea is that arduino will echo whole data in the buffer on the same line and starting from the new line while echoing the ...
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1
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ESP8266 serial monitor spitting out garbage
I am trying to set up a weather station, and I should just have the anemometer left. This code works fine (as far as I know).
// Pin definitions
const int reedSwitchPin = 2;
// Variables
volatile ...
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1
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sim800l gsm module response isn't completed
I am using the sim800l gsm module with nodemcu esp8266 and comunicating with it using AT+ commands. The module is working correctly but I am trying to use the command AT+CLCC to get all the current ...
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1
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57
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HardwareSerial and SoftwareSerial not compatible
The HardwareSerial requires to run an interrupt to store received bytes in the buffer. Look at this file from the Arduino Core.
If I am now constantly receiving and writing on the Software Serial, the ...
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1
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SoftwareSerial and HardwareSerial lost data
I need two Serial ports. One port is some sort of modified Software Serial, where I have to be listening constantly and send responses immediately if the port requires it. There is no XY problem ...
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1
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Arduino Uno WiFi Rev2 is sending serial data to IDE, but not to C# program
I have an Arduino Uno WiFi Rev2 which I am trying to read data over the serial port from (using C#). The Arduino program periodically emits data to the serial port (for testing purposes). Whenever the ...
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1
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57
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Why is the serial monitor not printing a variable?
I connected an Adafruit color sensor to my Arduino and am having it make calculations. However, when the calculations are done and sent to the serial monitor, it says "NDVI: " without ...
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3
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1
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How to ignore garbage values in serial communication between arduino and python
I have arduino uno. I am trying to send and receive serial data from arduino to python. I have usb to uart converter. I have connected its tx to rx of Arduino and rx to tx of Arduino and gnd is ...
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3
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Best way to send a boolean (1/0) to a windows application in real time?
I have an arduino mega connected to a light sensor that reads the status of a machine's indicator light. I have a C++ application that controls the machine, and I would like the arduino to send the ...
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1
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131
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Unable to upload sketch to Lolin S3 Pro (ESP32-S3)
I'm trying to upload a simple sketch to the new Wemos Lolin S3 Pro but unfortunately I can't seem to get it to work. I get the following error message:
Connecting......................................
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Can I use regular pins (Example: D2, A3, etc...) as serial (RX, TX)?
Python/Arduino Beginner here...
I have a DFplayer I am trying to hook to my Arduino and I want to hook it up through the regular pins instead of the RX and TX pins, but I've not been able to find ...
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2
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Arduino unable to read 0x41 and 0x42 (reads others just fine (ICT bill acceptor)
Here is my issue:
My code successfully recognizes and accepts $1 (0x40) and $20 bills (0x43), but it fails to recognize, display, process, anything for the $5 bill (0x41), and $10 bills (0x42). Also, ...
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nano 33 BLE problems with reading RC signal
I'm using an Arduino Nano 33 BLE and a L293D motor driver to control a three-wheeled RC robot. The sketch I'm using worked fine with my Uno Rev3, but I've moved to the Nano for size/weight reasons, ...
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Serial plotting a pwm
I'm trying to plot the value of the pwm that increases (every 2 sec) then decreases to compare it to the value of an encoder. I was expecting a continued value (like a step ) during 2 seconds but ...
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2
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converting comma delimited Serial message to 7 Unsigned Long variables
Working on a project where I get an input where its a comma delimited string like:
"255,10000000,42949672950254,12,22".
and then the numbers (no commas), would be split into 6 Long ...
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1
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How to produce a USB CDC serial port for Arduino nano 33 BLE?
I'm trying to program an Arduino Nano 33 BLE bare-metal to get some precise timing and size measurements. I've managed to upload the code to my card, but I cannot communicate with it. More ...
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0
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slave arduino receiving commands from two serials
I have a slave arduino connected to a master arduino mega (through UART) and to a RPi (through USB). The slave arduino is set to monitor various SHT85 (through I2C) and NTC sensors. What I would like ...
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1
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Maduino (Arduino Zero) at91samd21g18 - Unable to connect to the serial port
I have been using this device very little but it was use to work, and it also gave me the same issue in the past, the somewhat I was able to upload again.
I tried to use the reset button, and short ...
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0
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Serial does not receive all chars
I'm trying to follow Serial Input Basics to build a program which receives commands over serial like "<led:12,34,21>" but i'm stuck on receiving the characters from serial...
I have ...
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0
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OEM Arduino UNO not seen by COM port
Arduino UNO R3
My error code:
avrdude: ser_open(): can't set com-state for "\.\COM3"
An error occurred while uploading the sketch
This has been mentioned several times before here in the ...
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2
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Program to Multiply Numbers Won't Actually Multiply Them
I am trying to write a program which takes in a number of pairs to be multiplied, then prints out the result of each multiplication. Instead of doing this, the program just prints out the number of ...
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1
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I need some help in transmitting voice via VLC
The project I'm working on: Short-Range Coded Visible Light communication System.
Visible Light Communication (VLC) systems utilize light to transfer data between transmitter and receiver over short-...
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1
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Arduino Mega Loopback Test with Several TX/RX Ports
I am trying to do a loopback test using an Arduino Mega. What I am looking to do is send a byte over TX and receive said byte back at RX and verify that the byte is unchanged. More or less I just have ...
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0
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Any libraries exist for easy configuration via USB?
I have a device that would really benefit from a USB configuration tool. I'm envisioning "plug it into a PC, and it appears as a storage device with a YAML config file". Are there any ready-...
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Modbus RS485 Decode the message received
I'm try to read some value from a soil NPK sensor using RS485 Modbus e Arduino uno.
I menage to sent the request msg and I got the response but now i don't know how to read the response in order to ...
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0
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58
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HC-05 Disconnects Underwater(predictably). How to make it reconnect by itself?
So I have an application where I send a Bluetooth module underwater(in a waterproof case). I have the Arduino+module sending my computer on-land a constant stream of numbers. Predictably, when the ...
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1
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Why can't I upload a sketch by connecting directly to the serial pins?
I have an handful of fake arduino nanos. The work fine, but as an experiment, I tried to program them with a usb serial adapter (a real FTDI one). It doesn't work, but also, strangely, it seems to ...
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Incorrect data received on serial communication
I have two Arduino UNO connected with two wires, and ground, that exchange informations through serial data.
The communication is working with INT, but I am having troubles to receive correct ...
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0
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Sending an image captured using ov7670 using arduino and serially transmit it to python
I am working on using an ov7670 camera module with arduino uno,capturing the image frame wise and transmitting the image serially line by line of each frame to python for image processing, however i ...
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1
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523
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Need ESP32 to use 3 Serial Ports
I have a project that needs 3 serial ports on my ESP32 Dev 38-pin MCU. Two of them are for Nextion touch displays and the other is for a GPS. The problem from what I understand is that the ESP32 has 3 ...
3
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2
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589
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USB serial communication arduino nano and jetson nano
I want to communicate between Jetson nano and arduino nano through serial.
I wrote a simple script to test functionality but I receive strange data
here is the arduino code
void setup() {
// put ...
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0
answers
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Dump data check failed on a TinyPICO using ESP32
I use the TinyPICO microcontroller with ESP32 and I program it using the Arduino IDE. I recently got a new error on my Serial Monitor:
E (113) esp_core_dump_�^X.K�ɕ�dump data check failed:
Calculated ...
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