Questions tagged [array]
Refers to code that present variables in the form of an array.
280 questions
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Arduino Nano IoT 33 Char Array size constraints
I would like to save data that I am receiving from API calls in a char array. The problem is that the data is around 80 kB, and my Arduino IoT 33 only has 32 kB of memory.
It will save data in a char ...
CommunityBot
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0
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1
answer
88
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How to modify the Leonardo's HID descriptor
I'm trying to make an Arduino Leonardo work with a PS4 following a similar approach as ArduinoXInput with its modified AVR core. However, even though I managed to add the device and configuration ...
CommunityBot
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Serialise a struct containing a flexible array
I want to serialise and deserialise a struct containing a flexible array.
I did find a working code but wondering if it is the most elegant and optimum way to do it.
This is my first attempt below ...
- 163
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2
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Passing an array as an argument to a function [closed]
Please help how make it work.
int myArray1[] = {10, 11, 12};
int myArray2[] = {15, 16, 17};
void setup() {
Serial.begin(9600);
}
void loop() {
myFunction(myArray1); delay(1000); // i want to use ...
- 38.9k
1
vote
1
answer
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Why does filling up a large char array cause a crash? (ESP8266)
Here's the code in question:
void setup() {
Serial.begin(115200);
Serial.println();
char test[5000];
int i;
for (i = 0; i < sizeof(test)-1; i++) {
test[i] = 'x';
Serial....
- 45.2k
2
votes
2
answers
439
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Arduino receive response from SIM800H to AT+CCLK? command
I've been trying to make a program that interacts with SIM800H trough AT commands. It worked with the String class, but it was full of "memory leaks" and after a few hours it just hanged. ...
- 1,795
1
vote
2
answers
136
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Is there a maximum length of an array in ROM?
Consider the following code:
#include <Arduino.h>
unsigned char testimage [] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
...
- 634
-1
votes
1
answer
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Large arrays crash the arduino
I have three large PROGMEM arrays, in order to store musical notes for a song. One array is the notes, one is the note durations, and one is the pause after the note.
The first array is an int one and ...
- 45.2k
1
vote
1
answer
411
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stream a "big" array of measures to a server through wifi
I'm measuring accelerations at "high frequency" (4kHz) from an accelerometer (ADXL355/ADXL357) to an esp32. It's crucial that no sample is lost while performing a measure which last say 2 ...
- 45.2k
0
votes
1
answer
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How to send int array with ESP8266 http post request?
I'm reading RFID cards' UID with an ESP8266 and trying to send that information to my web server hosted on a Raspberry Pi. I'm currently storing the UID in an int array, but the http.POST(); function ...
CommunityBot
- 1
1
vote
1
answer
793
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ArduinoJSON - How to check if array is empty
Parameters file defines the creation of entities and stored in flash. Its structure is given, and all fields ( keys & values ) are given.
In current phase - those parameters are hard-coded in a ...
- 1,049
1
vote
2
answers
118
views
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 ...
- 45.2k
0
votes
3
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Does int array[100] = {0} construct work on Arduino?
I'm compiling my code in Arduino IDE. I have an array that I want to 0-initialize. I know memset works on Arduino, but I'm used to this way from my desktop C++ programming practice:
int array[100] = {...
- 38.9k
-1
votes
3
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146
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What is the best way to create a library from existing functions?
I was tasked to take functions that work, and create a library with these functions.
Take a look at the following function that existed inside a program:
char* Num_to_HEX_char_array(int32_t value)
{
...
- 18.3k
1
vote
0
answers
129
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Converting more strings from serial monitor to int arrays
I want to transfer 8 lists from a python script, via Serial Monitor to the Arduino. I can get the strings to Arduino and Arduino saves them as String array, but I can't change it to integer (it shows ...
