All Questions

I'm working on an LED project and intend to power a pro micro with 12v, and would like to avoid a buck chip. The schematics and datasheets all claim the pro micro can regulate up to 12v through the ...

I am attempting to control a Folinn VFD (Manual: Manual) with an Arduino Uno via a MAX485 module such as this. Pins for MAX485: DI > D8 DE & RE > D10 RO > D11 VFD settings: F00.01 set to 2 ...

Hello I'm experiencing a problem with LORA SX1276. My communication configuration is LORA P2P: Raspberry PI (as a master) using SX1276 Arduino MEGA 2560 (as a node) using SX1276 The system works ...

I am trying to develop proteus simulation for remote-controlled robotic car using two Bluetooth modules one attached with the robot and the other used as a controller remotely. the two Bluetooth ...

I'm trying to print the information, which is received from the other ESP32 by CAN transceiver, on an OLED. The CAN bus is working perfectly, as the 'HELLO WORLD' is already be received. But I can't ...

6 sensors connected to nodemcu 12E trough onewire interfacing sometime gives right reading sometimes -127 , and i confirmed all connection is ok as per diagram

Right now I'm programming an Arduino Uno Rev3, I'm using a Sensor Shield v5 (image at the bottom) to be able to have several Ultrasonic sensors and Servos. Right now I'm thinking about getting a ...

I am looking to use my Arduino as a on/off switch for my desktop PC. All I need it to do is bridge to pins on the Arduino as i will be connecting it to the PC motherboard on the power pins. I'm ...

I'm trying to logistically figure out how I could determine the position of an object (a Reed switch) along a path (of magnets). I understand if I start at one end I can just count the magnets as I ...

I'm looking to get into electronics, with a lot of interest in Arduino and Raspberry Pi, but also maker culture as a whole. I'd like to really be able to create and engineer a bit. Taking a glance at ...

I am having diffuclt times with this sensor, so I kndliy ask for your help! The sensor is named "SPUVA-CS-C3535-A", datasheet here. The sensor I use (cs3535) has just two pins (+ and -). From my ...

Connecting MPU6050 with Arduino without using A0-A5 pins.

I want to build a systems that measures if some parking spots are occupied or not. I chose to use an ESP8266 12-E NodeMCU Kit with multiple HC-SR04 ultrasonic sensors. In my project, it is essential ...

i have a lot of tags (Animal tags rounded yellow) EM4305, this have 15 spaces of memory and i need change ID writed, currently i'm using this module but it did not can possible write on tag, exist a ...

I am using the library SerialCommands and I am just trying to print the first text message in the Serial Monitor. But this code does not work for some reason. The expected result is that the Serial ...

I have an ESP8266 to which I want to connect a few ultrasonic sensors. I need to poll them every second in order to calculate the distance they measure. Because ESP8266 doesn't have many digital pins, ...

Im working on a sketch that needs to display some internal variable values and analogue reads in a simple webpage. The only catch is that it needs to be as reliable as possible. Im getting some odd ...

const int button1Pin = 2; unsigned long led1OnTime; bool led1On; int ENA = 9; //ENA connected to digital pin 9 int ENB = 3; //ENB connected to digital pin 3 int MOTOR_A1 = 7; // MOTOR_A1 connected ...

I'm trying to set up an ESP32 (DOIT ESP32 DEVKIT V1 in the Arduino IDE, with Espressif's WiFi libraries) with the following includes so far: #include <WiFi.h> #include <WiFiClient.h> #...

Ok. So I'm close to tearing me hair out on this one. I have a batch of cheap Arduino Nano clones, that just straight up won't work. (I HAVE gotten one of them to work, but I suspect that was by pure ...

I am currently carrying out a project where I am using an Arduino Mega2560, to recover data from two ultrasonics sensors (HC-SR-04). For the purpose of my project, I must add HTTP requests to this, ...

I'm trying to make a kernel for a macro-key maker, this is the starting page's code: char m[] = "What do you want to do? Type the following commands in this " "terminal:\nnew --> Creates a ...

I'm trying to use SMS messages to turn a relay on/off but before doing that i need to have a password system before allowing the user to turn the relay on/off. Basically, you have to send the password ...

I unable to trigger the interrupt on the nRF52840. Target is Arduino Nano 33 BLE Sense with the microcontroller nRF52840. Flash device J-Link EDU Mini. IDE is SEGGER Embedded Studio. I can exclude ...

Pc and Mcore with bluetooth module are paired. The port is COM9 outgoing in PC. However, when I send message Arduino does not get anything. I just disconnect arduino from pc and write simple code in ...

LCD #include <Adafruit_Fingerprint.h> #include <SoftwareSerial.h> #include <Wire.h> // Comes with Arduino IDE #include <...

The Arduino Nano 33 IoT looks great with its builtin Bluetooth chip. At ~€20 (Germany) it's pricey though and seems overkill for what I need anyway. What is a good, cheap alternative for a simple ...

Have anyone tried to program a ATTINY44A with Arduino IDE. Can't find json file to add in Board manager, does it exist?

I list networks wireless networks with ESP8266. In this list I am detecting unencrypted networks. Some networks like Eduroam - Uni appear unencrypted. How can I detect unencrypted networks in ...

#include <LiquidCrystal.h> LiquidCrystal lcd(2, 3, 4, 5, 6, 7); #include <SoftwareSerial.h> char Mob[20]="+923319020922"; String stringGPS = ""; String stringGPS1 = ""; char c=0; int t=0,...

#include <Adafruit_Fingerprint.h> #include <LiquidCrystal_I2C.h> #include <Wire.h> SoftwareSerial sms(2, 3); SoftwareSerial mySerial(4, 5); LiquidCrystal_I2C lcd(...

I have 1,500 LEDs that I would like to be able to control with one Arduino Uno board. Would I be able to do this?

I am looking to use the adafruit rfm95w(https://www.adafruit.com/product/3231) on top of the adafruit huzzah esp8266(https://learn.adafruit.com/adafruit-fea ... 6/overview) and an SPI sd card breakout....

By using the following draft i decode the signals from an RF receiver #define CH1 2 #define CH2 3 #define CH3 4 #define CH4 5 #define CH5 6 #define CH6 7 int ch1Time, ch2Time, ch3Time, ch4Time, ...

I have some unused pins, should I connect them together and to the ground or leave them floating?

I want to write an Arduino code, that runs on several different Boards. The code can perform digitalRead/Write operations, but the pin number will be set from the user/outside. I want to include a ...

I'm building a single master multiple slave RS485 network for remote sensors on test equipment. I have the hardware built and working, and I can do a Serial.print on the master and have the slaves ...

I am using MAC OSX Mojave and trying to program an Arduino UNO board. However, whenever I start the Arduino IDE, I only find one port in the ports section called: /dev/cu.Bluetooth-Incoming-Port. ...

I have a problem, I am using 56V DC combined batteries system. I get ADC values comes to Arduino like 211, 217 etc... I have to find out when the DC volt drop to 42V. How do i know the digital value ...

I have a 10 DOF sensor with wire outputs labeled "VIN", "GND", "SCL", and "SDA". I would like to wire these into my arduino and ultimately obtain x, y, and z displacement. This might sound like a ...

How to create a USB CDC device. (I'm using stm32f103c8 black pill board) and I want to read the data through USB in my raspberry pi as a serial port. I am using a black pill to read RFID-rf522 to ...

I have 2 Arduino Nano, they are connected via ports 2 and A2 While I use only one port to receive, it works properly. But if I activate the second port, system crash (and even first port don't work ...

I have a stepper motor 28BYJ-48 rated 5 V and I want to use a DVR8825 driver so I can use the 1/32 micro-stepping feature. My problem is that DVR8825 has a minimum operating voltage of 8.2 V. Would ...

Does the MB-102 can handle Arduino Uno, SIM900 and 3 other modules that requires 5v? If yes, does 9v battery is enough? If no, please suggest me what should I use that uses only 1 barrel jack(if ...

Arduino: 1.8.12 (Windows 7), Board: "Arduino Uno" Sketch uses 3938 bytes (12%) of program storage space. Maximum is 32256 bytes. Global variables use 240 bytes (11%) of dynamic memory, leaving 1808 ...

I have 2 questions. Why we have to put our functions before void loop and void setup into VScode+platformio? I switched from arduino IDE to VScode+platformio today, when I upload the sketch with ...

I've been designing a product for some time using arduino language, but on our own hardware. Recently a need arose to add some Bluetooth capability to our product. We decided to use BT classic instead ...

How can i convert file .ino to hex file so that i can compile new sketch via bluetooth. Can you help me to figure out the way to do this? thanks for helping

I've recently bought a SIM5320E GSM shield board for Arduino Uno and I've managed to get it working nicely - to send txt messages etc. The GSM shield can only use pins D2 and D3 for RX and TX. I would ...

So I'm having a little bit of difficulty here in my NEO-6M. The problem is it doesn't show any data in my serial monitor. My NEO-6M Led is already blinking so its already ok. RX -> Pin3 , TX -> ...