All Questions

Filter by
Sorted by
Tagged with
0
votes
0answers
6 views

Finding a Pro Micro that will take 12v

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 ...
0
votes
1answer
9 views

Controlling VFD with ModBus RTU via RS485 and Arduino

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 ...
0
votes
0answers
6 views

Arduíno MEGA 2560 and LORA SX1276 stop receiving

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 ...
0
votes
0answers
6 views

Virtual terminal for my Proteus 8 professional is unable to read the correct value of the data i entered

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 ...
0
votes
0answers
19 views

How can I display text on OLED?

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 ...
0
votes
0answers
17 views

-127 reading on DS18B20 i am using 6 sensors connected to one wire [closed]

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
0
votes
0answers
20 views

Using Arduino Sensors with STM32 based NUCLEO boards

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 ...
0
votes
0answers
25 views

Arduino desktop on/off Switch over WiFi

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 ...
0
votes
1answer
28 views

Using a Reed switch with multiple magnets?

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 ...
0
votes
0answers
23 views

Creating rather than following tutorials/instructions? [closed]

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 ...
0
votes
1answer
34 views

Reading sensor with current ouput with Arduino

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 ...
0
votes
1answer
20 views

How to connect MPU6050 with Arduino Uno without using A0-A5 pins?

Connecting MPU6050 with Arduino without using A0-A5 pins.
0
votes
0answers
16 views

ESP8266 GPIO limitations with HC-SR04

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 ...
0
votes
0answers
12 views

Is it possible to modify the animal tags (EM4305) with any module that works with Arduino? 134,2Khz

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 ...
0
votes
1answer
18 views

How can I make the Serial Monitor work with the Serial Commands library?

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 ...
0
votes
0answers
23 views

How can I connect as many HC-SR04 as I can to my ESP8266

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, ...
0
votes
1answer
24 views

Arduino Ethernet shield frequently drops its IP address

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 ...
-1
votes
0answers
45 views

Repair my code.and solution this problem [closed]

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 ...
0
votes
1answer
23 views

ESP32 HTTPS server - how to get POST request string

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> #...
0
votes
1answer
55 views

Arduino NANO (CH340) error while flashing bootloader [duplicate]

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 ...
0
votes
0answers
24 views

ESP8266 + Arduino Mega

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, ...
0
votes
1answer
29 views

Line not printing int in Serial Monitor

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 ...
0
votes
0answers
30 views

Using SMS to receive password, then to choose whether to turn the relay on or off

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 ...
0
votes
0answers
17 views

Toggle PWM IN interrupts on nRF52840 [closed]

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 ...
0
votes
0answers
14 views

MCore(Arduino) - Python bluetooth communication

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 ...
-1
votes
0answers
28 views

how to combine these two sketches [duplicate]

LCD #include <Adafruit_Fingerprint.h> #include <SoftwareSerial.h> #include <Wire.h> // Comes with Arduino IDE #include <...
0
votes
0answers
39 views

Cheaper alternative to Arduino Nano 33 IoT with BLE?

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 ...
0
votes
0answers
25 views

How to Program ATTINY44A from Arduino IDE

Have anyone tried to program a ATTINY44A with Arduino IDE. Can't find json file to add in Board manager, does it exist?
0
votes
0answers
32 views

ESP8266 - How can I detect unencrypted networks in authentication (hotspot)?

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 ...
0
votes
1answer
31 views

serial 1 was not declared in the scope

#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,...
0
votes
0answers
25 views

merge two loops in arduino uno?? compiled but not working [duplicate]

#include <Adafruit_Fingerprint.h> #include <LiquidCrystal_I2C.h> #include <Wire.h> SoftwareSerial sms(2, 3); SoftwareSerial mySerial(4, 5); LiquidCrystal_I2C lcd(...
0
votes
0answers
42 views

Can I control 1,500 LEDs from 1 Uno? [closed]

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?
0
votes
0answers
19 views

adafruit rfm95w and sd card

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....
0
votes
1answer
22 views

Decoding RF receiver signals

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, ...
4
votes
3answers
9k views

What to do with Arduino floating pins?

I have some unused pins, should I connect them together and to the ground or leave them floating?
0
votes
2answers
43 views

Read amount of I/Os in code

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 ...
0
votes
0answers
23 views

Arduino RS485 communication protocol - minimising overheads and best practice

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 ...
0
votes
0answers
16 views

Aruino UNO not getting programmed on MAC OSX

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. ...
-1
votes
2answers
38 views

Arduino Analog to Digital Conversion from 56V DC Batteries

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 ...
0
votes
0answers
31 views

10 DOF gyro and accelerometer to x,y,z displacement

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 ...
0
votes
1answer
38 views

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

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 ...
0
votes
2answers
42 views

Reading from 2 serial ports

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 ...
0
votes
1answer
18 views

Can I control a 28BYJ-48 5V stepper with a DVR8825 driver?

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 ...
0
votes
1answer
22 views

MB-102 BreadBoard Power Supply Limitation

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 ...
0
votes
0answers
21 views

Need help when i use ph 4502c and upload my code thats is going pop out [duplicate]

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 ...
0
votes
1answer
18 views

ESP-12 + FTDi + platformio

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 ...
0
votes
0answers
25 views

Arduino-compatible Bluetooth classic module to use in a product

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 ...
-1
votes
1answer
33 views

upload sketch via bluetooth for android

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
0
votes
0answers
9 views

Using NeoSWSerial library with EnableInterrupt and a GSM board for Arduino Uno

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 ...
0
votes
1answer
27 views

NEO-6M is working but it doesnt show data

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 -> ...

15 30 50 per page
1 2 3 4 5 400