Questions tagged [serial-data]

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31 views

Super fast UART transimission return error

The code was based on Fahad Mirza's very helpful example here Send structure through Serial The Sender's code now became struct Gyro_data_structure { char command_name[5]; float gyro_X; float ...
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1answer
50 views

TX pin sends wrong data in Arduino Uno

I want to send some data to an IP Modem from Arduino Uno. That IP Modem has TTL levels TX and RX inputs. I used this connection between Arduino to the IP Modem: I am powering Arduino with 12 V ...
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1answer
41 views

SoftwareSerial data being corrupted - looking for suggestions

I'm having problems running a serial communication between a NodeMCU ESP8266 and an Arduino Uno. I'm using the "standard" SUART setup, i.e. pins D1&D2 on the ESP are hooked up with GPIOs 2&3 ...
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3answers
52 views

Arduino Uno still boots and runs but no serial communication over USB

After having the Arduino Uno running for a short period of time, it seems to no longer communicate over the USB port when connected to the computer. It still seems to turn on and run the program ...
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1answer
30 views

UPDATE: Fault in processing code - doesn't receive correct data from Arduino

I am receiving data from an LDR which I am inputting into processing. The data seems to be received to Arduino correctly and I have looked at the data being sent via the serial monitor and it all ...
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1answer
66 views

Why do people use 115200 instead of 9600?

So I came across lots of Arduino program setting serial speed to 115200 instead of 9600, while many people just kept using 9600 for the same purpose. Why did people choose to use 115200 or other ...
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0answers
81 views

Serial communication is not working in arduino pro mini

I am using arduino pro mini ATmega328P(5v 16MHz) and a ftdi FT232RL to connect to the PC. The arduino does not produce any output for the AT coomads(blank output) when I connect both rx and tx pins to ...
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0answers
57 views

ESP8266 mqtt publish + subscribe + serial read

seems I have some issues in my code as I subscribe for specific mqtt topic and also read same value via serial and publish it to mqtt. It takes time for device connected to serial to change setting ...
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0answers
41 views

Nodemcu & GSM module & CLIP problem (CLIP line not always appears on the serial connection)

I'm working on phone-controlled car park gate. Trusted employees numbers are saved on SIM card/hard coded in program. So the idea is, if a trusted person calls the "gate number" ; Nodemcu will ...
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1answer
34 views

Serial monitor when port is being used by another application

I am controlling some LEDs via the USB serial port using a Tkinter/Python3x script to debug what I suspect is a hardware problem. from tkinter import * import serial usbport = 'COM3' ser = serial....
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1answer
45 views

SD card readline reading batched lines?

So, I am trying to transmit float data, over UART, from my Arduino to another machine. The log of this data is really large, so I am forced to put it on an SD card, and read it into the Arduino line-...
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2answers
134 views

Serial.availableForWrite versus Serial.flush

Is there a difference between the following two line codes? while (Serial.availableForWrite <= 0) {} versus Serial.flush() Thanks!
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2answers
59 views

How to program micro chips directly with USB

Is it possible to program chips like the Arduino uno's Atmega328P directly with USB serial from your computer? Where can i find information on the protocols/standards to do such a thing? More ...
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1answer
50 views

Getting issues while using SoftwareSerial

I am trying to read string send from esp8266 esp01 to Arduino mega. When I use normal Rx and Tx ports, it works properly but when i am initializing new serial port using SoftwareSerial then nothing is ...
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2answers
106 views

Arduino Bluetooth communication is slowing down because of the 'for' loop!

I'm sending data to Arduino through the mobile app. So far, all the code has been running consistently. #include <SoftwareSerial.h> #define FASTLED_INTERNAL #include <FastLED.h> #define ...
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1answer
105 views

Interrupts arduino interrupting serial comunication

I have problem with communicating VB.Net-Arduino. It seems the interrupt pause my serial communication line in void loop() { ... }. I don't know what to do, and I can't erase interrupts line since I ...
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1answer
269 views

sending string from Arduino to ESP8266 works on UNO but not Pro Mini

I have a project where I am getting sensor data and sending it over to an ESP8266-01 to send to ThingSpeak. After some work I got it to work. So like I real smart person I decided to replace the ...
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1answer
96 views

How to stole/read data from an output serial port?

(Sorry, I'm not a native English speaker) I have a chip with Serial Input, Serial Output, and a Clock (used by both serials). I want to read the output with an Arduino or ESP-32. The device I want ...
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0answers
48 views

Reading byte per byte from a txt file on SD Card without using the 512Bytes buffer

I am trying to read every sequenced-byte that is located on a txt file in the SD card. I have been reading quite a lot about the SPI and SD libraries, But I have found a lot of different information ...
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1answer
107 views

About UART one transmitter multiple receivers

I have vector nav vn100 IMU that sends data serially rs232...I want to drive 4 servo motors using atmega32 upon roll angel from vector nav vn100..atmega32 can only drive 2 servos using hardware fast ...
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1answer
124 views

Can I daisychain multiple Arduino Nanos to a single USB port (specialized purpose)

I need to have several Nanos on one USB port. They will have separate power, so power constraints won't be a concern. I need them all to go through the same serial port. They will never get anything ...
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0answers
44 views

Arduino serial read data conversion, getting garbage values

I am developing code on Arduino to read 9 bytes of data from other controller. I am getting same arrya elements which is transmitted from controller, but when I convert the same it gives me garbage ...
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1answer
198 views

Parsing data in arduino?

I just started working with Arduino and in my project I am trying to achieve the COMM between two Arduino using HC-05 in master and slave mode respectively, I configured it all successfully. Now I ...
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0answers
34 views

Is it a rule of thumb to always use a buffer for realtime data acquisition from a microcontroller? [closed]

I probably have a misunderstanding one way or another, so this may be a bad question, but whenever I see sketches of projects that are outputting realtime data or in general, I always see the use of ...
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1answer
143 views

Fast data logging

I want to store noise data (basically from A0) from an Arduino Uno to an SD card with faster writing speed, preferably by using 512 data together and the write it at once. What should be the code?
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0answers
55 views

Help with code for changing motor speed depending on MPU6050 angles read

I have been trying to create code where my MPU6050 is constantly reading the angle it is at and based on that angle, increase or decrease the motor speed. For example the motor will be off when the ...
-1
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1answer
156 views

Sending double data from Matlab to the Teensy 3.6 via the microUSB

I've been hitting against a wall for over a week now. My current project is to use a Teensy 3.6 to send data over an SPI bus to a chip which is effective going to be a signal generator. I've made a ...
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2answers
169 views

Can't Interface SIM900a With Arduino Uno

I've got the following module of SIM900a. My connections are: VCC -> External 5 Volt 1.5 Amp Supply GND -> Common GND TX -> Arduino RX (Pin 0) RX -> Arduino TX (Pin 1) I hear a ring ...
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1answer
124 views

How to parse multi line serial data with an unknown number of lines? [closed]

Here's the example data I've read in H-Term: \r\n \r\n NO:0015\r\n G: 5.97kg\r\n T: 0.00kg\r\n N: 5.97kg\r\n \r\n \r\n How to save the number including "kg" to each variable (NO, G,...
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1answer
123 views

Method to iterate over the bits in a byte sent over serial [closed]

In my current project which integrates Arduino/avr IC with Raspberry-Pi, and each communicating via serial, I'm looking to send a byte of data to the Arduino from the RPi, which then would be iterated ...
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1answer
38 views

Question on how “f” value is calculated in converting Morse Code to laser audio from this tutorial

I am working on this tutorial, https://www.hackster.io/SURYATEJA/morse-code-communication-using-laser-module-both-ea1b01 and the author created a "Send" and "Receive" code for encoding and decoding ...
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2answers
61 views

Command through Serial monitor does not properly work in Arduino

I am executing a function in Arduino by giving String input to the serial monitor. The issue here is when i enter "SHOW$" (without quotes) the function showData() works but when i enter the same "...
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0answers
68 views

Have terminal bash script act as virtual “button” for Leonardo?

I've searched quite a lot for this and tried to piece bits of code together but with no luck so far. All i'm looking to do is have a command I can run in terminal/bash script on the Mac trigger some ...
1
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2answers
67 views

Help to delimit and read specific contents of incoming HTTP string

I am sending strings to an Esp8266 via web browser. The below code returns the following in serial monitor if I send in browser: Send from browser to esp8266 - http://192.168.1.220/s1s2s3s4s5d1 ...
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1answer
498 views

problem data I2C to sensor GY955/BNO055 (China)

I want to ask, I have a problem when running the Arduino sensor, I can't output data, but it's detecting that the sensor address has been paired. Like I2C has a problem or locks it. Last night it ...
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3answers
276 views

Sending file from PC to Arduino

How can i send a (file) from PC to Arduino Yun at running time ? There's a way to send some commands via Serial. But how would a whole file goes ? Assuming the file can take place at RAM without any ...
0
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2answers
209 views

Serial Communication between 2 Arduinos for analogRead value

I have an optical sensor connected to A0 on Arduino #1 (Nano) giving me values from 200 to 1010. I need to receive these values in Arduino #2 (Nano) through serial communication. I have used a simple ...
1
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1answer
978 views

getting error 'Serial' was not declared in this scope

I am adding Dust Sensor to my particle photon project at home, I got this GitHub project that I want to test before implementing a final code. I am not an expert in cpp, I wanted to modularise the ...
0
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1answer
28 views

Serial data not parsed correctly

The code I have works for the most part but when I send data via bluetooth received over software serial, too quickly, it is not parsed correctly. I'm a bit stuck with what can be done to a void the ...
0
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1answer
272 views

How can i split an incoming data in arduino? [duplicate]

So for my arduino project I need to split this line of servos data 180 0 0 0 90 90 0 Which would be parsed as: servo position1 servo positin2 servo positin3 ...servo position 6 in to separate ...
0
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1answer
338 views

Serial communication between 2 arduino's doesn't works when Sending string in a program with a lot of functions

Note : This question is completely different from the questions that I have asked before although the code snippets might be the same, So please do not waive it as a duplicate right when you see ...
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4answers
99 views

Arduino reads string from another Arduino only if the string is in a loop why?

In my setup I have connected two arduino's Serially. An Arduino Mega is the on that is sending the string and a Arduino Uno is the one receiving it. Arduino Mega : RX1(19),TX1(18) - Serial1 ...
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2answers
945 views

Why can't my bluetooth receive serial data from my android phone, but can send serial data from my bluetooth to my android phone?

I can receive serial data from my phone but I can't send serial data to the arduino using bluetooth. I can see my input from serial monitor to my Android but not the other way. I'm using ARF7044A ...
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3answers
216 views

Read one value from continuous data stream at a lower frequency

I am working on a university final project and have run into a problem with programming Arduino, after a 3 year hiatus. I have a pressure transducer that is sending pressure data at 10Hz. I have ...
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1answer
564 views

Arduino reading value from external devices on

For this device it says: The PC Interface Option has all the features of the standard DC1100, but also has a COM Port interface that allows you to capture the air quality data to a PC for graphing ...
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2answers
275 views

Arduino Due & Spec gas sensor - how to choose specific information from a stream of incoming bytes to store

I'm trying to build an air pollution sensor for a college project, with an Arduino Due and a series of Spec Sensors digital gas detectors. However, I'm having a little trouble getting the first one of ...
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0answers
64 views

How to connect to LCD and communicate via serial usb simultaneously? (UNO)

Pretty simple home automation project I am working on. I'm trying to hook my arduino which has a 16x2 LCD, DHT22 temp/humidity sensor to my Pi via usb. I want to be able to maintain the values on the ...
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1answer
2k views

How do I get a nonzero output from my HX711 and load cell?

I am trying to set up a load cell using the HX711 amplifier. Whenever I upload my sketch, my serial monitor only will read zeros regardless of load applied to the sensor (no signal appears to be ...
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1answer
47 views

How do I get multiple readings(binary) based on my arduino output?

I am new to arduino and therefore not much experience in handling codes, please be forgiving and help me! For my school project, make use of arduino to make 4 capacitive sensors (which has already ...
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2answers
808 views

What causes Serial.available() to become false after Serial.read() gets data?

As serial data bytes are being read from the serial buffer by Serial.read(), are they removed from the Arduino's 64-byte serial buffer altogether? In my current situation I'm using SoftwareSerial, ...