Questions tagged [programming]
The process of designing and writing source code as part of a program (or sketch) for Arduino. For questions about uploading code to an Arduino board, use the [uploading] tag instead.
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DHT22 sensor reading code interprets negative values weirdly
The following code reads the DHT22 temperature and humidity values, assuming the pin value as the sensor's host pin.
When the temperature drops below 0°C, this code returns inadequate values in the ...
CommunityBot
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Receiving incorrect Data through CANbus MCP2515, Nano to Nano - Data points 3, 5, and 7 only go to 7 bits instead of 8?
We are trying to get two Nanos to communicate via CANbus, using MCP2515 shields. I have decided to use the autowp/arduino-mcp2515 CAN interface library for the code. I've based my code off their ...
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Need help with programing the LCD for my project
I am trying to make a digital die for my project at school. I am having trouble with the programming. I don't really know how to write code and I am not a programmer.
I took inspiration from a post on ...
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Difference Between delay() and a while Loop with millis() in Arduino?
What are the practical differences between using delay() versus a while loop with millis() for timing in Arduino projects? I assumed both methods are blocking, but I'm not completely sure.
Example ...
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How to set cables to connect CP2102 to Pro Mini?
How do I connect the cables in order to program the Arduino Pro Mini with the CP2102 usb interface?
The TX, RX and GND is easy, but I am not sure about the RST, DTR, DST, etc.
When I try cables like ...
CommunityBot
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Make an Arduino board act as both a usb storage device and a keyboard?
I am making an interface project that, when plugged into a computer, shows up as both USB flash storage and can type like a keyboard when some physical buttons on the board are pressed.
I have seen ...
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Can I use regular pins (Example: D2, A3, etc...) as serial (RX, TX)?
Python/Arduino Beginner here...
I have a DFplayer I am trying to hook to my Arduino and I want to hook it up through the regular pins instead of the RX and TX pins, but I've not been able to find ...
CommunityBot
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Code for a load cycler seems to be stuck
I am trying to make a battery load cycler to charge and discharge a battery repeatedly for a certain amount of cycles and here is my code:
bool in_charge_mode;
int cycles = 0;
float cutoffvoltage = 2....
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Function of rxAlign parameter in the PCD_ReadRegister function in MFRC522 Library
I'm trying to port the MFRC522 Arduino library (from GitHub) to the ARM MCUs.
My problem is with the PCD_ReadRegister function:
/**
* Reads a number of bytes from the specified register in the ...
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expected `}' at end of input
int scvVal = 6;
int drvVal = 9;
int sensorVal = A1;
void setup() {
Serial.begin(9600);
pinMode(6, OUTPUT);
pinMode(9, OUTPUT);
}
void loop(){
sensorVal = analogRead(A1);
Serial....
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rfid_default_keys check with RC522
I just received a RC522 board and since i am new to RFID, I tried out some examples from "Arduino RFID Library for MFRC522". Here's one of them
rfid_default_keys
/*
* -------------------------------...
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Using WiFiServer in blocking mode
I am learning ESP32 network programming and I started by writing a simple telnet server. It uses a WiFiServer object to listen on port 23 and just log anything it receives to the serial monitor.
...
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Can one re-program a Leonardo Eth via its Ethernet port only?
Let's assume we have an Arduino Leonardo Eth running some sort of networking application, perhaps a very simple web server. Importantly the server is read only and static HTML. There is no ability to ...
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Reading JSON from Arduino via Serial Missing Parts of Message
I have a project (Digital Dashboard for a Motorhome) in Pi that reads JSON data from an Arduino board and sends it via Serial.
The Pi gets the JSON data, makes some adjustments and then sends it to an ...
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"return" not working to break out of a loop
I'm fairly new to this, and I haven't been able to find any answers after searching repeatedly.
I have a Startscreen() function that I run during my setup sequence, and within that function i use ...
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