All Questions

0
votes
2answers
27 views

Load Resistor Use for Voltage Sensing by Arduino

I connected a piezoelectric film to a Arduino Uno board via analog input. However, as I was getting very high voltage values (reaching 5 volts without much movement). Therefore, I added a 1 megaohm ...
0
votes
1answer
34 views

Arduino OSX Mojave - Serial port only shows sometimes

I've found lots of issues about serial ports not showing up at all, but none about what I'm experiencing. Sometimes I can see my Arduino Mega 2560 in the ports list, and sometimes I can't. I've tried ...
0
votes
1answer
16 views

Any possible way to stack Motor Driver shield L293D with Xbee Shield v03 on arduino?

So i am trying to stack these two shield on arduino, now the problem here is that i guess there is a conflict between the pins of arduino being used by both shields, so can anyone suggest a solution?
0
votes
0answers
23 views

Optical mouse sensor M116504386 arduino libary

I am doing project and I used optical mouse IC sensor M116504386 with 16 pins and I don't know how to get this sensor libraries to interface it with arduino uno.
0
votes
1answer
22 views

Firmware backup and restore

I need to have the firmware stored somewhere on the board in order to get back to it after flashing a new firmware. Is there a way to store a backup of the firmware somewhere, and use a button to ...
0
votes
0answers
7 views

Arduino MKR 1010 WiFi as BLE central/client

I'm trying to use my new Arduino MKR 1010 WiFi as a Bluetooth Low Energy central/client, however I could only find information on how to use it as a peripheral/server (for example with the ArduinoBLE ...
-4
votes
0answers
23 views

Angle measurement device with app integration [on hold]

Firstly, I’d like to apologize in advance for the long post, but I am in serious need of help. I am currently working on a project to design a novel wearable device which will act as a calisthenics ...
0
votes
1answer
43 views

How to write a float value EEPROM

I'm using this library for my DS3231 which have a Atmel 24C32 on it. i have a float value which increases by 0.5, like: 27.50 28 28.50 ... the code is like this: float lowTemp= 10.5 float ...
0
votes
1answer
18 views

esp8266 esp01s EEPROM and flashing

which flash option do I need to take to use EEPROM? Can I flash with 1MB and no SPIFFs and still write data to EEPROM? thanks T
0
votes
0answers
26 views

Pure mechanical engineer here. can i learn arduino within a month [on hold]

Good Day Everyone, I am a Mechanical Engineer who doesn't have any tiny bit knowledge of electricals or elecctronics.I am required to work with arduino for my final year project. So i want to know if ...
0
votes
1answer
28 views

ESP8266-01 is not working and it's hot

it has been so long since I tried to connect the esp8266 through Arduino Uno and get it to work my goal is to send data from the Arduino Uno to web site, I have tried everything and a lot of codes but ...
0
votes
1answer
15 views

What is the use of reserved pins and SDD2, SDD3 pins of the NodeMCU?

How to use the reserved pins on the NODEMCU? What is their use? Also what is the use of SDD pins? Thanks.
0
votes
1answer
44 views

Get 5V output from NodeMCU [duplicate]

I have a sensor that requires used of 5V as input to Vcc. But I dont see any 5V output pins on the NodeMCU 1.0(12E). Is there a way I could get 5V output pins? Its not a duplicate question. I want a ...
0
votes
1answer
27 views

DS3231 and EEPROM

Currently to get time/date i'm using DS3231 module with the RTClib library, i want to use the Atmel 24C32 chip on the module to store some small values (temperature etc). Can i use the current ...
1
vote
1answer
42 views

Is it possible to execute a code in runtime when gets updated over the air (OTA)?

I would like to build a lib like ArduinoOTA but with no downtime at runtime. To achieve that I am wondering if it is possible to create a simple setup and loop code to Check for new releases If we ...
0
votes
0answers
21 views

So I am working on integrating a MLX 75306 linear optical array with Arduino

So I am trying to read the data from MLX 75306 linear optical array with Arduino, I know the sensors interfaces in SPI, and have connected to the correct SPI ports on the Arduino Uno but my biggest ...
0
votes
1answer
57 views

Person (phone) detector that trigger an event esp32 cam

So me and my dad are trying to catch would be thieves and also someone leaving behind alcohol bottles. At his storage business the cameras don't reach to these spots. Without being too invasive I ...
0
votes
1answer
26 views

Can an Arduino Pro Mini interface with a full-sized WiFi shield?

We have an Arduino Pro Mini on a breadboard connected to a 9V battery and a sensor, reading data. We also have a full-sized Adafruit WINC1500 WiFi Shield with PCB Antenna. I would like to know if they ...
0
votes
0answers
23 views

Make pc program for read arduino data and print on display [closed]

I make small project for my father. Pls help me.How to read data for arduino and print on the my pc app . I make temp and humedity arduino project. I like visit the temperature on the my app. PLS help ...
0
votes
1answer
19 views

RTClib library the second, second

I'm using RTClib for my DS3231 module, the problem is the library is displaying the second without zero behind it: 22:1:1 and when i print the time on my 16x2 LCD time is displaying like this: 22:...
0
votes
0answers
24 views

HC-05 Bluetooth module on breakout board with straight header pins

Has anyone found the HC-05 bluetooth module (on the breakout board) with straight header pins? I seem to only be able to find them with the 90 degree header pins. Removing those and soldering on ...
1
vote
1answer
47 views

What is causing this warning in Arduino IDE?

I'm using DS3231 module with rinkydink library and it is working just fine, however every time i want to compile the code Arduino IDE shows this warning: C:\Program Files (x86)\Arduino\libraries\...
0
votes
1answer
33 views

Activating a Relay with Wemos D1

I have a problem similar to these questions: Wemos D1 doesnt drive Relay Wemos D1 is not triggering Relay I got this BC548B transistor from an old apparatus I scratched. The transistor saturation ...
0
votes
0answers
10 views

Why such large error on opAmp in my setup? [migrated]

I'm working on a device that would restore voltage on my collection of used 18650 cells. The theory is that they need to be charged extremely slowly with constant current of max 100mA until they are ...
0
votes
1answer
55 views

20x4 LCD shows up as 20x2

I need help with my LCD. I have a 20x4 LCD and it shows up as 20x2. The LCD address said "// Set the LCD address to 0x27 for a 16 chars and 2 line display". I changed it which says "// Set the LCD ...
0
votes
0answers
14 views

Cannot import library file from ESP32 sdk library in “Eclipse C++ IDE for Arduino” project

I have successfully installed "Eclipse C++ IDE for Arduino" and the Plugin works fine. Now I installed a custom board (ESP32) by adding package_index.json URL in windows>prefrences>C/C++>Arduino. The ...
-1
votes
0answers
31 views

Make Leonardo appear as UK or US English keyboard to Mac? [closed]

I'm using a Micro Pro Leonardo, it's a Chinese clone (3.3volt version). For some reason I believe the Macs I run it on see it as a Chinese keyboard and that makes some of the inputs incorrect as ...
0
votes
0answers
21 views

Can't get the right values with the pulse sensor and the LM35 temperature sensor . Reading 2 anolog sesnors

I am trying to combine the two sensors (pulse sensor using this library and LM35 temp)(on a Arduino UNO board),but there is a problem with them when is a noise at the pulse sensor .The values are ...
1
vote
0answers
30 views

Can't get fastled.h and remoteme.h to work together

I'm trying to make a Google Assistant controlled LED strip, but I'm stuck. I can control the on board LED of the nodemcu with Google Assistant, and I can control a LED strip too, but I can't combine ...
0
votes
0answers
13 views

Error Starting SPIFFS

There is a problem running a simple SPIFFS file system code on different versions of the Arduino IDE, as code shown below. In Arduino IDE version 1.8.4, works fine. No longer version 1.8.9, can not ...
0
votes
0answers
23 views

Simulating a magnetometer [closed]

I need to simulate a magnetometer that senses earth's magnetic field and also an artificial AC magnetic field of a frequency between 30-80 Hz. I also want to simulate getting values from the simulated ...
0
votes
0answers
26 views

How to make a Day/Week Timer with Arduino Help I need [closed]

hi I trying to build a timer like your outdoor timer that has like 12 programs but id like more but it can do mon tues wed thur fri sat mon-fri sat sun this here is what I wanna do to my code.. ...
0
votes
1answer
49 views

cross correlation of two analogread value on arduino?

I am working on a final project called sound source localization using Arduino Uno. I want to use two sound sensor to capture a sound. The nature of the sound is clap or speech sound. I want to use ...
0
votes
0answers
21 views

invalid conversion from 'byte {aka unsigned char}' to 'void (*)()' [-fpermissive]

char auth [ ] = "8439"; // Wi-Fi credentials . char ssid [ ] = ""; char pass [ ] = "chan"; const int SENSOR_PIN = A0; const int RS = 0.5; const int VOLTAGE_REF = 32; const byte ButtonPress = 2; const ...
1
vote
2answers
46 views

ESP8266 Webserver not reachable after 2 minutes from reset

I have a Keyes Espressif ESP8266 NodeMCU, I have two LEDs that I want to control which are connected to the ESP. When I open the webpage http://10.0.0.5/5 after uploading the sketch it works fine. If ...
0
votes
0answers
27 views

how can i send get and post request from esp01 using arduino uno

I am using an esp8266 01 module with the Arduino Uno to establish a communication between the Arduino and my web site. I actually don't know how to send Rest HTTP requests from the Arduino to get data ...
0
votes
1answer
47 views

How to stringtok this long string?

I have a string, "id,port,password,ssid,delay,flag,class,category" Please tell me how can stringtok this and find out the "flag" value(0 or 1)? Here is what I tried: void setup() { char input[]...
0
votes
0answers
20 views

Programming AFE4404 using Arduino mega2560

I'm facing difficulties programming an AFE4404 using the arduino mega2560. I'm using AFE4404 I2C to program it. I tried most of the code I found online with minor changes to get all the LED and ...
1
vote
2answers
28 views

Connecting Function Generator to Arduino

I want to send a function generator's signal to an Arduino UNO Analog pin. Can I use an Oscilloscope probe connected to the function generator output BNC, set to 1x to connect to the Arduino headers ...
0
votes
0answers
31 views

Why does my TFT keep turning white after moments?

Alright, seems there is something wrong I am doing that I don't understand. Before I start explaining, my question is different than this white screen question. First of all my TFT ST7735 is working ...
0
votes
0answers
33 views

Addresible led delay for 24 hours with arduino uno

Im working on a project with my addresible led strip and arduino uno I need 3 leds on the strip to light for 24 hours and then the next 3 leds on the strip should light up for 24 hours and so on. Can ...
1
vote
2answers
59 views

How to modify a created byte?

I have created a byte for 16x2 LCD. It is basically a custom character which I will have to change later. byte char[8]{ B10000, B01000, B00100, B00010, B00001, B11000, B11100 }; I want to ...
0
votes
0answers
19 views

LCD on top of SD datalogger flickers help!

I have a problem with my 16,2 with buttons lcd shield.(LCD Keypad Shield). It is connected on top of an SD dataloger. I came to the conclusion that every time the sd shield logs data and completes the ...
0
votes
1answer
27 views

Combining code for multiple sensors in one program (Arduino)

I need to operate 2 different sensors (gas and DHT11) simultaneously. I have managed to run each one of them separately and I don't know how to manipulate the code so they could work together. Here ...
0
votes
1answer
22 views

How to wire a hall effect sensor to arduino?

it's a UGN3503 hall effect sensor, in some schematics they used a 100uf capacitors and data connected to analog pin and in some a pull up resistor and data connected to digital pin. as someone new to ...
0
votes
0answers
27 views

Arduino and NodeMCU problem with wifi conecction

Hello guys I am beginner with micro controllers but I am trying to make a simple IoT with Arduino and NodeMCU as WiFi. I was using this tutorial and code https://www.electronicshub.org/wifi-controlled-...
0
votes
0answers
21 views

Laser Engraver with Arduino Uno + CNC shield V3 + A4988 driver (without TTL/PWM modulation board) [closed]

I am absolutely new in this field so i am a complete novice....... But I would be highly obliged if i can receive some info regarding CNC Laser Engraver on the problem that i am currently facing........
0
votes
1answer
84 views

Stuck with bad sketch

How can I get my programmer board/windows computer to recognize my board again. I am using the esp32 cam and have put two boards in a state where I am unable to flash them anymore. here is the error: ...
0
votes
1answer
25 views

Water pump controlled by soil moisture sensor

I'm just learning to code in Arduino. The purpose is that first the sensor measures the moist level (I mapped the reading values from 0 to 100). If the value is less than threshold 70, then it will ...
0
votes
1answer
33 views

Using use the STM32F103C8T6 board with the Arduino

last two days I am trying to program my blue pill with Arduino IDE, helplessly... Actually, I managed to install simple blink program, but after that, all other attempts ended up with: Failed to ...

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