Top new questions this week:
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I’m using an Arduino Nano, a UNL2803 IC, and three 2N3904 transistors to drive three seven-segment vacuum fluorescent display tubes (IV-6) in a multiplex configuration. The UNL2803 is used to drive …
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I am using Arduino IDE 2.0.3. When compiling code if there is an error it shows on a black background with a red font, that is hard for me to read. Can I change either the background or the font? …
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I am trying to control a servo motor with the following code: #include <Servo.h> Servo servo; int const inputPin = 3; void setup() { Serial.begin(9600); servo.attach(9); pinMode(…
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I wrote a TCP client in C and a TCP server in Python. The client runs on a ESP32S2 board while the server runs on my PC (virtual Linux OS) and both the board and PC are connected to the same Wi-Fi. …
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Consider this code: void loop() { digitalWrite(pinTest, HIGH); digitalWrite(pinTest, LOW); } On an Arduino Mega 2560, running 16MHz (=0.06us), I would expect the width of the pulse to be …
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github.com/espressif/arduino-esp32/tree/master/libraries/HTTPUpdate I found out that this library can read x-MD5 header but looks like it’s going through with the update no matter what MD5 I …
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I have written this code: char message[4]; memcpy(message, &delta, 4); Wire.write(message, 4); When I try to compile I get this warning: warning: invalid conversion from ‘char*’ to ‘const …
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Greatest hits from previous weeks:
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What is an ICSP pin? I have read that it is an AVR and a tiny programming header for the Arduino, but what is an AVR and what does an ICSP pin do?
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I am attempting to connect and use an ESP8266 board with my Arduino nano v3.0 and I am not have much luck. I have read a bunch of tutorials and articles, the most recent is elektro-blogger….
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I started recently working with a uBlox Neo 6M GPS module (data sheet www.u-blox.com/images/downloads/Product_Docs/NEO-6_DataSheet_%28GPS.G6-HW-09005%29.pdf). I connected it to an Arduino Uno …
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Trying a simple led blinking program I could not get the builtin led on a LoLin Node MCU v3 working. The LED_BUILTIN constant is set to pin 16 / GPIO16 / D0. Reading several articles and QA I think …
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There was a similar thread before but it didn’t solve my problem. I had an issue with sending GPS data, which is float, and I couldn’t receive the float with the same amount of significant figures as …
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I’m starting to build my first Arduino project but I’m running into some problems with serial communication. I get serial data from the console and store it in a char array called “data”. Then, when …
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I want to have a LED turn on when I push a button and go off when I push the button a second time. This code doesn’t work: const int buttonPin = 4; const int motorPin = 10; const int ledPin = …
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Can you answer this question?
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I have been trying to develop multi cpp project in platformio and whenever I define ESPAsyncWebServer class object with the extern in defines.h and declare it in main.cpp I am getting scarry looking …
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