All Questions

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
48 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
28 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
48 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
34 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
21 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 ...
0
votes
1answer
32 views

Public IP for Arduino with Ethernet shield and Arduino Uno

I'm new Arduino and I would like you to help me. I would like to have a public IP so that anyone can get access to it, not only from domestic domain. What could I do?. I'm using Arduino Uno, Arduino ...
1
vote
1answer
45 views

Arduino USB host + RS232

I'd like to get a word of advice regarding the subject. Basically there's a COM port based device which I need to connect to an Android tablet via USB. The tablet will be exchanging data packages with ...
0
votes
1answer
13 views

Serial communication questions

I have to arduino's which are communicate using rx/tx. Arduino1 (A1) send data over serial to Arduino2 (A2). My questions are: 1 - If A1 do Serial.print each 50ms and A2 reading serial each 100ms ...
0
votes
1answer
23 views

Arduino controlled LCD 16x2 is very very dim

I was testing out whether my 16x2 LCD works. I hooked it up to the arduino. Some white box appeared which probably meant it works fine, but the box and the blue background looked very dim even when ...
0
votes
0answers
18 views

Using use the STM32F103C8T6 board with the Arduino [duplicate]

last two days I am trying to programm 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 ...
1
vote
1answer
20 views

USing arrays, binary data and bitRead

This is my first manually typed code. I'm sure there may be some glaring "schoolboy errors" in it, so wondered if people could give it the 'once over' In particular, I have never used C++ arrays, ...
0
votes
0answers
15 views

IFTTT google asisstant [closed]

I've tried several times to test the Google Assitant integration with IFTTT but nothing. I have tried to send a phrase for blynk but it seems that it cannot accomplish the task. it is functional ? or ...
0
votes
0answers
33 views

How to Insert Data in Arduino's Direct Mysql

As inserted in a Arduino Mysql Direct Tablela I'm new to Arduino and would like to know how to do something in the code to make a copy in the database This code to pass the RFID and authorized ...
0
votes
1answer
38 views

Help combining digital and analog code in arduino programming

So I'm making a device that does 3 things, Measures frequency of an audio signal through a microphone Checks whether there is a weight placed on a pressure pad (my pressure sensor works through the ...
1
vote
1answer
27 views

Servo Motor in function

I have a project with 9 servo, I want to make a function to control each separate. Only that he is not accepting the servo as a parameter. Can someone tell me if it is possible to pass the servant as ...
0
votes
0answers
29 views

Sending commands to an STM32 chip via UART with Arduino Pro Mini

I am having trouble making an Arduino Pro Mini send commands via USART to an STM32 chip. The serial communication protocol is currently set to 9600 baud rate with no flow control or stop bits. Is ...
1
vote
0answers
33 views

esp32 and the esp32-cam (agoal)

Is it considered possible to use the esp32 code on an esp32 cam board? Do they use the same hardware? I am having difficulty using this sketch https://gist.github.com/wybiral/...
0
votes
2answers
33 views

How to upgrade ESP8266 NodeMCU SDK from V2.5.2 to V3?

ESP.getFullVersion() output: SDK:2.2.1(cfd48f3)/Core:2.5.2=20502000/lwIP:STABLE-2_1_2_RELEASE/glue:1.1-7-g82abda3/BearSSL:a143020Connecting to DO_231455 I upload sketches from the Arduino IDE. How ...
0
votes
0answers
31 views

Can I use the NodeMCU ESP12 5v pin and control it with a relay?

This question might be a little esoteric, but I cannot find any answer for it. Situation: I want to have more than 8 Analog sensors on a NodeMCU ESP32. Unfortunately due to SPECTACULARLY poor design ...
-1
votes
0answers
19 views

How to connect Arduino to LTC6803?

I'm trying to build my own BMS to manage 36 CALB 100Ah cells, and I am kinda stuck on how I should wire 3 of these LTC6803's together and then to an Arduino Nano clone. Any ideas?
2
votes
1answer
79 views

How to repeat an IF statement

My LCD info is called from an IF statement but since it's clock and temperature info i don't want to just show the information but update the information constantly in real time. i don't want to use (...
0
votes
1answer
23 views

Problems with controlling LED with soil moisture sensor

I'm a beginner at Arduino. I have a soil moisture sensor and I mapped the lowest and highest moisture value to a value in between 0 and 100. What I was trying to do was if the value was less than ...
0
votes
0answers
22 views

Waking up a NodeMCU when force load is applied to device

I am currently designing a device that will take measurements from a load cell that is in tension. I am using a v1.0 NodeMCU device that features an HX711 load cell amplifier and is running off of ...
1
vote
1answer
46 views

Dynamic Serial port selection and use without instantiating all Serialx objects

I have an arduino project that reads a config file from SD and then receives data on a serial port that is specifed in the config file. I therefore need to instantiate the Serial (Serial0), Serial1,.....
2
votes
1answer
46 views

The arduino can't seem to output correctly

i am a beginner at python and I am average at Arduino and I had the idea of using both of them together for a project. I have been trying to make a Arduino + Python car which I can control with my ...
0
votes
1answer
35 views

atmega328: external crystal oscillator and uart

I need an clearity about external crystal oscilator. I got communication between esp32 and atmega8/88/328 processor, I use atmega wih internal oscillator and looks like it have problem with serial ...
0
votes
1answer
35 views

Changing the light state

Can someone give me a solution to the following problem? I have 1 IR remote, blynk app,some pushButtons and also 1 relay module. (I set 1 pin of ATMega as input to be able to read what esp sends when ...
-1
votes
0answers
42 views

I'm building arduino radar. I need help with the servo [closed]

I'm building arduino radar. I need help with the servo. The servo doesn't move 180 degrees back ans forth. My project consist of the following: Smraza UnoR3, Breadboard (830 Tie-points), LCD Display (...
0
votes
0answers
24 views

5th Led wont turn on (ws2812)

I'm trying to re-use a piece of example code I found here: https://howtomechatronics.com/tutorials/arduino/how-to-control-ws2812b-individually-addressable-leds-using-arduino/ And I only have 5 LEDs ...
0
votes
0answers
27 views

Run DC motor with 2 limit switch and reverse delay time

I setup the feeding system with arduino uno, L298, dc motor and two limit switches. When i press the push button rotate CW and opened gate. All right up to here. But i want to make i pushed button ...
0
votes
0answers
39 views

How to send and receive data over LAN from an esp8266 operating as a station?

I have an esp8266, I have an led connected to one of the GPIO pins, I want to be able to control the state(high or low) as well as request the current state of the led from my computer which is ...
0
votes
0answers
12 views

Arduino menu coding problem by Keypad and 128*64 graphic LCD

I am trying to modify on the menu code to be able to use a keypad shield and arduino for scrolling between lines. after uploading and trying the code the following has happened: 1- I can not scroll ...
0
votes
1answer
45 views

How to create a wired ESP8266 range extender? [closed]

Context: I have a NETGEAR router on the first story of my home, the range doesn't extend to the ground floor. I do have a cable duct from my router(on the first story) to the ground floor. Question: ...
0
votes
1answer
33 views

Error conecting raspberry with my arduino in a serial port [closed]

Hi i am trying to make a comunication between theses device but when i am trying to run in my raspberry i have the follow error: Traceback (most recent call last): File "serial.py", line 1, in ...
0
votes
1answer
54 views

Connecting to WiFi on ESP32 using credentials from SD card

I'd like to use an SD card to provide the login credentials to an ESP32. I've already got the ESP32 reading the relative data from the SD card and storing it as a char array on the ESP, but when I use ...
0
votes
2answers
62 views

How to automatically reset the NRF24L01 module

For my home-automation project I'm using several arduino nano's with each a NRF24L01+ module. Each module is able to both receive and transmit with one another. Everything seemed to be flawless for a ...
0
votes
2answers
53 views

Constant ADC sampling rate on ESP8266 or ESP32

I want to sample Sound input with either an ESP8266 (preferred) or ESP32. As I'm using a low pass filter anyway, a sample rate of 1000-2000hz would be totally ok. What is more important, is that it is ...

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