Questions tagged [data]

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Parsing the data from an HTTP POST request on a ESP8266 / wemos

I'm sending an HTTP Post request on my Android App to my Wemos D1 mini pro and want to parse the incoming data (which is a json). My current code just prints out the whole POST request and I need to ...
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26 views

how do I detect a data connection?

on an ardunio, is there a way to detect if a data connection (vs power only) is present? I want to have my arduino behave differently if connected to a pc, or on stand alone power. specifically, I ...
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61 views

Wrong serial data

I am communicating with a system serially using Arduino Nano and I am able to communicate with it except for one issue. I have two functions and I want to call them together so that I can get two ...
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1answer
32 views

How to detect patterns in an FFT output?

I have an FFT output from a microphone and I want to detect a specific animal's howl from that (it howls in a characteristic frequency spectrum). Is there any way to implement a pattern recognition ...
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1answer
52 views

Is it possible to connect Arduino to an instrument and import data from the instrument?

I purchased a coulomb meter recently. Basically, It is an instrument to measure static charge. The display is fixed and there is no way to take data from the instrument. So, I can't take continuous ...
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21 views

Sending sensor data from Android app to arduino via USB Serial

I've searched this and have only found solutions for receiving data FROM Arduino TO android, I need the opposite. I basically need to figure out how to press a button from my android phone that will ...
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2answers
34 views

Parsing Arduino Receiving Strings

I'm currently using google geolocation to get location data to one nodemcu and sending it through serial to another Arduino. The serial command I'm getting right now is, 1.450187T103.824745 I'm ...
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19 views

Reading and sending data from a micro SD card using Micro SD card adapter without using buffer

Actually, I am trying to get data that appears in a .wav file, but I got the problem that it is not as fast as I need because, looking around the SD library I found that most of the bits are saved ...
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2answers
53 views

Arduino security

My question is how secure can I make an Arduino? The project I am working on would put the Arduino out in the public (school campus inside a trash can to sense how much trash is in it) and I want to ...
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1answer
36 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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42 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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2answers
309 views

Can a 150 PSI Pressure Transducer accurately measure up to 30 - 40 PSI? [closed]

I have an Arduino project which requires reading pressure data from a pipe. The best pressure transducer I have been able to find is this one. Seeing as though its max pressure is 150/200 PSI, will ...
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1answer
317 views

Arduino String: use a non-null-terminated char array?

I'm using a library that takes a String as it's parameter (https://github.com/gmag11/painlessMesh) I want to pass char arrays that is binary (UTF-8) data that also contains null-bytes (0x00). Right ...
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1answer
853 views

Problem converting character array into integer in arduino using atoi function

I'm receiving a character string from a radio signal on my arduino. This character string consists of four character digits, which I want to convert into an integer. The four digit sequence may ...
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1answer
228 views

How to scroll data in LED dot matrix through multiple modules?

I've been struggling in this issue for a long time, I know there are people who have done it. But, I don't have much experience in C to have the skills to design or develop such complicated functions....
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1answer
535 views

ATtiny84 vs ATtiny85 consumption

I'm doing a comparative study between ATtiny84 and ATtiny85, and I found from the datasheet that ATtiny84 consumes less current, is that normal even if it is bigger in terms of size and number of pins?...
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1answer
313 views

Writing data to a specific address in EEPROM

I'm trying to write two strings to an Arduino Uno's EEPROM. Here, the first code block works fine: it writes string(True/False) at 'address 0'. But the second block, which writes data at 'address 5', ...
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1answer
27 views

Is this a good function for I2C receive?

I'm trying to fix my I2C code: Is the following function correct because it has multiple returns. I don't know if that would work. uint8_t I2C_rx(uint8_t ack_rx) { uint8_t i; if (ack_rx) ...
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1answer
326 views

Two data outputs to be displayed on one 16x1 lcd display

Before pursuing this very far, I would like to know if I can get two different data outputs (one on the left 8 and the other data on the right 8). And if so, are there any requirements on the display ...
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1answer
284 views

Transfer byte-buffer with ENC28J60

How do I transfer a series of byte[256]-buffers to a server with an ENC28J60 Ethernet adapter? I get blocks of uint8_t from an Arducam camera module and I'd like to transfer them to a host. Does ...
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1answer
74 views

Passing serial data to Processing using something other than ln to trigger Processing

I have a Uno program and I can transfer data to Processing using println. In Processing bufferUntil('\n') interprets the ln as \n, stops buffering, and reads the string until the next '\n'. I would ...
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1answer
358 views

How can I split data coming from JSON?

In my recent project, I'm working with Arduino and JSON. Now, I get data from JSON and I can able to receive in Arduino side. Below one is my Arduino code: #include<LiquidCrystal.h> ...