Questions tagged [bytes]
A group of binary digits or bits (usually eight) operated on as a unit.
12
questions
0
votes
1answer
44 views
Function displaying byte instead of value
I'm not sure I understand everything I do, but here is my issue:
I'm using ESP-now between two ESP32s.
Here is the code of the first ESP:
#include <WiFi.h>
#include <esp_wifi.h>
#include &...
0
votes
0answers
109 views
arduino split string into an array [duplicate]
i have problem with change srting to array
my string input is like this B109DAE1B71B638E it come from Serial.readString
and i want to change this string to array byte like this
byte in01[] = { 0xB1, ...
0
votes
2answers
126 views
Is there a variable type of half byte? Is there a workaround?
I have this long array of 64 values going from 0 to 15, values which only cost 8 bits, for a pulse width modulation.
So I made a test to see its cost in space, commenting one of the two arrays.
const ...
-1
votes
1answer
266 views
Reading Buffer from Software-Serial & Writing to Serial
My progress so far:
#include <SoftwareSerial.h>
SoftwareSerial ttySerial(10, 11); // RX, TX
byte buffer;
void setup()
{
// Open serial communications and wait for port to open:
Serial....
0
votes
1answer
559 views
RF24 library commands, channel, and address
I'm trying to use the RF24 library for wireless communication.
However, it appeared that this library does not have "help" option.
There was a keywords file but it did not explain what it does.
I ...
1
vote
3answers
2k views
Set and extract individual bytes of a number (lowByte() and highByte())
You can extract
the low-order (rightmost) byte of a variable
or
the high-order (leftmost) byte of a word
with the functions lowByte() and highByte() respectively (the quotes are from the ...
1
vote
2answers
168 views
need to compare if a byte is less than 80 hex
I am using an infrared sensor called OTI301. In its data sheet it says that in order to obtain object temperature and ambient temperature values I need to extract the binary information from the ...
2
votes
2answers
249 views
How to convert char[12] to byte[6]
I am trying to convert a char[12] array that contains a Mac Address into a byte[6] in order to use within the Ethernet.begin method. I have tried various methods from online, but had little success to ...
1
vote
2answers
87 views
How to modify a created byte?
I have created a byte for 16x2 LCD. It is basically a custom character which I will have to change later.
byte char[8]{
B10000,
B01000,
B00100,
B00010,
B00001,
B11000,
B11100
};
I want to ...
1
vote
1answer
787 views
USing arrays, binary data and bitRead
This is my first manually typed code. I'm sure there may be some glaring "schoolboy errors" in it, so wondered if people could give it the 'once over' In particular, I have never used C++ arrays, ...
0
votes
1answer
81 views
Arduino will not read three successive packets in the serial connection
I have written a small program to send serial commands from Python to the Arduino Micro. This is my code for both:
Python
import serial
ser = serial.Serial('COM5', 9600)
ser.write(b'0')
ser.write(...
1
vote
1answer
1k views
Passing arrays, global arrays within functions, pointers, and declaring array sizes
I'm super confused right about now!
I've been working on project involving Xbees in API mode, and I need to send different arrays of bytes to the Xbee depending on which buttons I press. Mostly what ...
