9
votes
Accepted
How to pass 'Serial' as an input argument in Arduino function?
The Serial object is the end of a chain of classes, each with a different set of functionality.
Print -> Stream -> HardwareSerial => [Serial]
Since you are reading from it the best class to ...
- 106k
9
votes
Accepted
Non-blocking SoftwareSerial.Write
In short, you don't.
The SoftwareSerial implementation for AVR doesn't have an outbound buffer at all.
It just turns the interrupts off during each character outbound and it sends them all immediately....
- 5,719
7
votes
Accepted
Create New Serial Class Inheriting from Stream
The Stream class has pure virtual methods which must be implemented in derived not abstract class.
The pure virtual method from base class Print is:
virtual size_t write(uint8_t) = 0;
The pure ...
- 18.3k
6
votes
How to write a library that support both HW and SW Serial communication and allow user to chose which one to use?
The trick here is to go "up a level". Both HardwareSerial and SoftwareSerial inherit from the Stream class. It is that class that provides the majority of the interface that you actually ...
- 106k
6
votes
Printing the array using print and serial write function in Arduino Uno
Serial.write(some_byte) writes a byte on the serial output. The
Arduino serial monitor tries to interpret the bytes it receives as text:
0x11 is a control character, displayed as “□”
0x22 is the ...
- 45.2k
6
votes
reading device or board specific properties from the Arduino MKR WiFi 1010 device
The IDE shows the serial number so I looked into the SAMD core and found the function which reads the serial number from registers. It is in the CDC.cpp file
uint8_t Serial_::getShortName(char* name) {...
- 18.3k
5
votes
getting error 'Serial' was not declared in this scope
I learned that I needed to include Arduino.h header file
apart from that I learned .ino files and .cpp files is that the .ino files transparently include particle.h for you.
The other difference is ...
- 575
5
votes
How to chose softserial library use on Arduino project?
I think your problem is that you need 4 serial ports.
With software serial that's just not going to happen:
SoftwareSerial can only receive on one serial port at any given time.
AltSoftSerial is ...
- 106k
5
votes
Accepted
What is the best delay to use between characters sent to the serial port
SoftwareSerial has a considerable overhead. It can often send at 115200 successfully but 9600 is about its limit for receiving, and you're trying both send and receive. In addition, for each character ...
- 15.4k
5
votes
What is the best delay to use between characters sent to the serial port
Simply put, a serial port implemented in software requires the program to sample the input pin fast enough to detect every transition. To satisfy the Nyquist frequency rate we need the program to ...
- 7,513
4
votes
Can increasing the size of the software RX buffer cause problem in Arduino Uno
The buffer is in the UNO's limited (2K) RAM; you'd be using 1/4 of it for the input buffer. If your app is small enough and simple enough (limited call depth, specifcally), there may still be enough ...
- 15.4k
4
votes
Why does SoftwareSerial::read() return int?
The documentation on Arduino's website shows SoftwareSerial::read() as returning a char.
No it doesn't. There is nothing in the documentation that tells you the return type. There is only an example ...
- 106k
4
votes
Accepted
Serial.availableForWrite versus Serial.flush
The line
while (Serial.availableForWrite() <= 0) {}
waits until the serial output buffer is not full. Whereas
Serial.flush();
waits until the serial output buffer is empty.
- 45.2k
4
votes
Accepted
Converting each digit in an integer to its respective ASCII characters
To convert a whole number to a char array in one go use the itoa function. That sounds like what you actually need.
To convert one digit from decimal to ascii just add '0', the ascii value for a 0....
- 3,391
4
votes
Accepted
SoftwareSerial read until available is empty only works with delay
Serial does not transmit data as one bunch, but byte by byte. There can easily be some little delays introduced, especially, when transmitted via a packaged protocol like bluetooth, long enough, for ...
- 16.6k
4
votes
Accepted
How to read from and write to rs232 device from/to Arduino
You didn't show how you connected the MAX3232, so I cannot say anything about that. But I can write something about your code and how the data gets received on the PC.
On the PC: Here it is important ...
- 16.6k
4
votes
Accepted
which is the best way to declare Serial while creating Arduino library?
As regards the use of Stream:
I usually use Stream instead of HardwareSerial because:
It allows the use of other serial devices, like SoftwareSerial or USBSerial that aren't "Hardware" ...
- 106k
3
votes
SIM800L not registering to network
I am 90% sure it's a power issue. Not sure on what board/module you're using but the SIM800L/SIM900 needs a burst of current of 2 A during 577 µS (See the manual).
Try using 4700 µF ...
- 103
3
votes
Arduino Pro Mini Serial Monitor garbage
I had the same issue. The problem was solved in an other forum:
https://forum.arduino.cc/index.php?topic=434623.0
I copy the solution here:
It appears that in fact your board is not running at 8MHz, ...
- 193
3
votes
Accepted
SoftwareSerial runs out of "text" space on ATtiny
Your sketch doesn't fit into program memory of the ATtiny. If you comment out the println of the array, the compiler evaluates that the array is not used and doesn't attach it to the program. Then the ...
- 18.3k
3
votes
SoftwareSerial runs out of "text" space on ATtiny
There is not enough room in program memory for 140KB. ATiny only has 8KB for the whole program. So there is no way to fix this with your current hardware.
Options-
add a storage device (SD card, ...
- 630
3
votes
Receive data from Arduino board to Android application
I don't think your code is correct:
void loop () {
if (blueTooth.available())
Serial.write(blueTooth.read());
if (blueTooth.available()) <----
blueTooth.write(Serial.read());
}
...
- 5,652
3
votes
Sending PUBX commands to GPS Board (Ublox NEO-6M) through SoftwareSerial
I've tried your code sending those PUBX commands to a ublox module and they work successfully for me.
There are a lot of fakes about on the internet using AT6558 chips repackaged as ublox. Check the ...
- 31
3
votes
Accepted
Entire arrays are not read by Processing sent by Arduino unless cord is unplugged and plugged back in?
I would suggest that you are seeing reset-stutter from the serial. Basically the sketch is running and filling the serial buffer with data. Then you connect and the board resets, but some data is ...
- 106k
3
votes
Accepted
Passing HardwareSerial and SoftwareSerial as a Class Property
A base type for Arduino hardware serial classes, SoftwareSerial and other software serial classes and some other Arduino classes is Stream (reference). Stream.h on GitHub
class CustomSerial {
private:...
- 18.3k
3
votes
ESP8266 ASCII to HEX convertion and checking
A little explanation about HEX and ASCII:
About HEX
Raw computer data consists of zeros and ones. For humans it is difficult to read a (long) row of zeros and ones. You can represent such a row (of a ...
- 443
3
votes
Software serial conflict with WiFi on ESP8266
As noted, there are conflicts between Wifi and SoftwareSerial. The attempt in the question to disconnect WiFi is a step in the right direction, but not enough. You have to actually turn off the WiFi. ...
- 261
3
votes
Accepted
Why does SoftwareSerial::read() return int?
You'll see in the code just above your third link that the function can return a value of -1 if there is no data present. Thus a 16-bit value is used to cover the range of 8-bit uint8_ts, plus one ...
- 836
3
votes
Getting issues while using SoftwareSerial
SoftwareSerial only works on a few select GPIO pins on the Mega. Specifically those pins that have PCINT on them.
But that is irrelevant. There is no reason to use SoftwareSerial on a Mega except in ...
- 106k
3
votes
Accepted
Reading from EEPROM and combining
You cannot use the + operator for that.
However, since EEPROM.read only returns one byte and not a string, you can do a much easier implementation:
void loop()
{
char result[] = "1:2:3";
for ...
- 13k
Only top scored, non community-wiki answers of a minimum length are eligible