Arduino

Questions tagged [datalogging]

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logging data into some storage or memory

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56 views

Writing to sd card with a sampling rate 50ms or less? I have a sketch that writes to sd every 1s but jams at faster sampling rates. Please help?

My code below reads data from an ADC and 3 digital pins via a Mega and prints to an SD Shield (Deek Robot). I want to be able to read the data every 50ms (20ms ideally). I can't get below 250ms. I've ...
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1answer
19 views

I cannot open/write to dataFile SD shield in mySketch but have no problem with Datalogger example sketch from the SD library…?

Hello Arduino Community I am collecting data and attempting to log it on to a Deek Robot SD shield via a Mega. I have the data in a dataString which I can Serial.print to the monitor but would ...
0
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1answer
26 views

Does LabVIEW Linx affect the communication speed with Arduino?

I am using LabVIEW to connect to Arduino Mega. I control a logic gate to switch the current On/Off and at the same time there is an I2C connection with a sensor. It came to my attention that the ...
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1answer
49 views

Why am not being able to initialize the Micro-SD?

The reason I bought this MicroSD board because to follow their guide and I have used the recommend code in: File > Example > SD > CardInfo also did the slight change in the code for const int ...
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1answer
69 views

creating HTTP persistent connection, to create 'smooth' data over GSM sending

Project goals Send data over GSM to firebase Fast sampling - need to send 16 bytes every half second to firebase Send data using GET or POST to server with PHP script, that redirect data to firebase ...
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0answers
28 views

Send data from arduino to server using GSM, TCP

My actual connection is like: Arduino -> GPRS(http)-> my server(php script)-> firebase <-android plotting app But it only allows to send some data once every 2 - 3 seconds (depending of ping to my ...
0
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1answer
45 views

Can't store RFID data in the next 5 bytes of array

I'm working on RFID project to handle multiple cards. I did most of the things OK. But now I have one problem. Which is the following: The RFID code is 5 bytes, so I need an array of 5 bytes. If ...
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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 ...
0
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1answer
59 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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1answer
61 views

Arduino stops logging data after ~32761 seconds

I made a small set up to log temperature on SD card, everything is running smoothly until it reach 9:06:01 of logging that is 32761 seconds. I know that corresponds roughly to the maximum value of an ...
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0answers
87 views

AD7606 DAQ and datalogging

I'm making a Data Acquisition System for force impact usign an AD7606 from Analog Devices, an Arduino DUE and a load cell. I already tested it following this guide an making the proper changes for ...
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40 views

Unsure how to get pressure data from MCP3424

I am having trouble reading data from an MCP3424 chip, specifically the one from this website: https://uk.rs-online.com/web/p/general-purpose-adcs/6696086/ I have a pressure transducer that connects ...
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1answer
198 views

Data loging while browsing a menu on LCD shield

I'm new in arduino and not particularly awaken when it comes to code ;) . I'm developing a device SD logging Temperatures from 2 thermocouple . Hardware works well and I'm now trying to refine use of ...
0
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1answer
179 views

Conflict between SD card shield and accelerometer

I'm trying to get the SD card (Adafruit microshield SD card) and an MPU6050 accelerometer to work at the same time. When I connect the SD card to the Arduino (without the accelerometer), it's ok; When ...
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0answers
112 views

How can I read the serial output of STM32F103C8T6 from USB to Serial TTL?

I recently bought a STM32F103C8T6 board (blue pill) I programming to it using the USB to Serial TTL I bought (CP2102). I'm still taking very first steps and trying to figure out how to operate the ...
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3answers
103 views

Arduino log file directly to file

I have problem because I need to read values and then save them in a .txt file, but Arduino doesn't have a physical connection with my computer. It only has a connection with a computer using Ubuntu ...
0
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1answer
347 views

Interfacing AD7606 with Arduino Due. How to data-log?

I have an 16 bit ADC7606. It is in parallel mode. I have a working sketch that allows me to read 8 channels, convert the 16 bit integer to decimal and then serial prints to monitor. I would like to ...
0
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1answer
63 views

Averaging input from multiple input over a fixed amount of time (estimated)

I am trying to average input values for a number of inputs and have it then store those averages into a string to write to a txt doc on a sd card. I am using: // read 6 sensors and append to the ...
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2answers
48 views

Tian stops working after some hours

I'm having a very strange problem. I have a Tian that is programmed to send out sensor data to a server every x seconds. My program run well but after 14,15 hours of operation it stops working and I ...
2
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3answers
860 views

Is it possible to use extra AVR Flash memory as non-volatile EEPROM-like Flash memory storage?

In STM32 microcontrollers it is possible to use a technique that ST calls IAP, or In-Application Programming, in order to write to the Flash memory from your running application. They even have a nice ...
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2answers
508 views

Uniform timing when using Arduino for data acquisition

I am using Arduino UNO together with a SPI ADC (LTC1859) and SRAM (23CL1024) to record a series of data points at approx 2 kHz sampling rate (let's say a few thousand data points). I have some ...
0
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2answers
247 views

EDB char array problem. New input word overlaps the previous words saved

I have been searching everywhere now and nothing seems to work out for me. When I try to input a new word, it overlaps the previously entered words. Here is my struct definition: struct LogEvent{ ...
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2answers
341 views

EDB. Is it possible to create multiple tables with db.create()?

Good day! I seem to be having trouble creating multiple tables with EDB. I am using Arduino UNO and SD Card module to save my db. Here is my Serial. Here is my table declaration. struct ...
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2answers
632 views

Using a Micro SD card for data logging, bad idea? Reliable?

I'm planning a project that will read data from an I/O board. The micro SD card would hold data for input bit identity, labeling ?, then logging after events end. Nothing would be written to or read ...
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2answers
393 views

How to use an Arduino to measure speed of rocket

I am not very experienced with Arduino and I am trying to learn it. I was wondering what is the easiest and most effective way to calculate speed and log it every second so to say. This would be ...
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1answer
2k views

Download and print data from Thingspeak

I opted to try doing this with Thingspeak Library instead, which @gre_gor suggested early on. Worked much easier! Here's working code for anyone else trying to do this. I used the MKR1000. #...
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1answer
168 views

3 AC current sensors using one Arduino Uno board measuring at 200Hz

I'm new to electronics and need some help please. I'm planning to measure current of a 3-phase output using one sensor for each phase (thus 3 sensors would be required). The frequency of data ...
0
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1answer
756 views

ERROR on SIM900AT comand HTTPDATA (POST method)

Good day community, I have a project which is VEHICLE GPS Tracker and I'm using Arduino Mega, NEO GPS6MV2 and SIM900. I'm using SIM900 to send the GPS coordinates on a web server. I'm using the POST ...
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2answers
477 views

How to read data from an NI DAQ?

I'm using an Arduino to control an experimental setup and read analogue signals from some sensors. But there are other sensors for which I need a DAQ for. I have a National Instrument USB-6259. On my ...
0
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2answers
646 views

Arduino Uno SD card fails to initialize

I'm not sure why my SD card fails to initialize when I run my code (below) but works when I just check to see if it is being read by the Arduino with the CardInfo code in the Arduino library. The ...
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1answer
892 views

Setting Time to UTC with Data Logger Shield (with RTC DS1387)

I own an Adafruit Data Logger Shield https://www.adafruit.com/product/1141 I followed this tutorial https://learn.adafruit.com/adafruit-data-logger-shield/using-the-real-time-clock This part of code ...
2
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2answers
492 views

Grab keys from an ordinary USB kyboard

Arduino USB I want to write an Arduino Sketch (if there is no other possibility it can also be plain c) , to grab keyboard inputs from my ordinary USB keyboard. Preferably without expensive hardware, ...
4
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2answers
3k views

Data logging speed with arduino

I am trying to make some data logging conserining physiological data coming from a bitalino. My problem is that I would like to collect samples at something like 1 kHz, that is the rate that the ...
0
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2answers
83 views

Saving sensor logs of unknown length

I have a sensor giving me values (ints) which I want to keep, and send to a computer via the WiFi shield when requested via HTTP. I have the HTTP thing working, however, I do not know how to have a ...
4
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1answer
195 views

Advanced Arduino Project Help

So, I am an Engineer working on a very time tight project. I want to create a system capable of collecting data from a Photodiode and compiling it in a way that will separate data into four columns ...
0
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1answer
127 views

Sparkfun OpenLog both lights flashing

I'm building a simple RS232 data logger with the Sparkfun OpenLog and a SEEED RS232-TTL adaptor. I'm powering it with a 9 volt battery and a 7805 voltage regulator. It's dead simple. I built it on a ...
2
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0answers
491 views

Arduino Sdcard database Library [closed]

Im using Arduino connected to an SD card and PIR sensor , and based on the inputs from the PIR sensor the data needs to be written on the sd card , It is done , but for retrieving the data from the SD ...
3
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3answers
353 views

How to connect 70 analog sensor to a single Arduino (Mega or Uno) device?

I was working on a project in which I need to collect soil moisture data for a farm. For this, I need to collect soil moisture value from 70 sections of the farm on a single Arduino. But, this is not ...
5
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3answers
2k views

External Flash Memory File System

I'm building a weather data collector and I want to be able to dump that weather data somewhere. I've considered the options, and since I'm going to be storing a fairly small amount of data (in the ...
1
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1answer
274 views

What is the point of a adafruit data logger

In order to play an audio file, I was suggested to get an Adafruit data logger, yet right now I am stuck with the project and I realized that I'm not using the data logger to its full potential. Yet ...
0
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1answer
198 views

PCF8563 does not remember time when restarting Arduino Uno?

I'm trying to use the following RTC module (PCF8563) with Arduino Uno. I am using this library to set/get time and date from PCF8563. However, whenever I shut down the Arduino, the time/date is lost! ...
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1answer
678 views

Pattern detection in sensor data

I'm using a heart rate sensor along with an Arduino for a project of mine. I have to determine whether the heartbeat is following a particular pattern (eg: when when heartbeat regularizes a lot after ...
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2answers
563 views

Data acquisition/logging question [closed]

I want to use an Arduino Uno for a data-acquisition purpose. Normally adhoc data acquisition boards can record each sample at a desired sampling rate. So that I can plot all the samples recorded. I ...
2
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3answers
5k views

Using Arduino as Keylogger

Is it possible to use arduino uno r3 as USB keylogger by connecting the usb male pin to CPU and keybord cable to female USB pin of arduino. So that the keystrokes are stored in EEPROM. Without using ...
0
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1answer
123 views

How might the SD library be reading phantom files?

I have the Sparkfun CAN Bus shield with integrated SD card writer attached to an Arduino Mega 2560. I can delete a logged file from the SD card using Windows, log more data using the SD library, then ...
2
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3answers
2k views

Sum values, store them and print the last value

I have a mass flow meter connected to an Arduino Uno board. I have managed to read the volume flow in L/hour, but now I'm struggling to implement a code that stores the values so that I see the number ...
11
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3answers
20k views

How to increase SD card write speed in arduino

I'm creating a data-logger system which logs data in SD card at a high speed of about 20000-30000 bytes per second. But the SD library in arduino currently writes data at about 4500-5000 bytes per ...
0
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1answer
1k views

nRF24L01+ packet loss caused by Arduino reading and communicating with sensors

I have 2 Arduinos communicating with each other. My problem is that one sends packets every 1.5-2 seconds but the other Arduino does sensor reading and data uploading with a Wifi module, which may ...
1
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1answer
460 views

How to structure data for HTTP upload

I'm building a GPS tracker using an arduino nano, Adafruit Ultimate GPS breakout, a SD card slot and a SIM800L module. So far everything works, the tracker uploads the data to a server as well as ...
0
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1answer
715 views

Interfacing to scale over RS-232

Objective: interface and Arduino MEGA to a Mettler Toledo SB32001 using the RS-232 communication protocol described in the manual. Equipment Used: SB32001 Mettler Toledo 32 kg scale Arduino MEGA ...

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