All Questions

0
votes
1answer
24 views

Mapping segments and memory allocation on a segment LCD driver

I've just configured a segment LCD and driver, everything works fine, but because I decided to not use vias on the PCB, the connections between the two are mixed. To be more precise, in order to ...
1
vote
1answer
21 views

Create a device to detect object and voice alert what kind of object it is [closed]

Here is what I want to do (since I'm not a embedded guy) create a prototype with an Arduino to detect objects using camera(object classification?) that prototype will detect objects and alert that ...
1
vote
1answer
25 views

Where can I find the source codes for the various classes and methods used in Arduino Primo?

I am new to Arduino development. I am trying to connect a BLE device (Arduino Primo) with my iOS app. From the Arduino BLE examples, I understand how to initialize the BLEperipheral class and then ...
0
votes
0answers
25 views

How do I get makefiles for custom boards?

I want a makefile to compile a sketch without Arduino IDE. I found MakeFiles that is compatible for Arduino boards like the Uno, and atMega derivatives. Here I have a different one, STM32 development ...
1
vote
1answer
35 views

Is it possible to connect many (20+) SPI sensors to an Arduino Mega?

I am making a system for measuring whether or not there is vacuum present in big steel containers. They are located up to 100 meters from the control cabinet. The question is, how many SPI sensors ...
0
votes
0answers
23 views

Reasons Flash Page is Locked Due

Using the Arduino Due on a project, I have found that I commonly run into the issue Flash Page is Locked when attempting to upload. I have used the library write functions of DueFlashStorage that ...
0
votes
0answers
10 views

VNH2SP30 Motor Driver not working in reverse

I bought 2 new VNH2SP30 Motor Drivers because i thought the first one was broken but they are both giving me the same issue, they run in forward direction but not reverse... When the motor is ...
0
votes
1answer
25 views

WiFi connection times out if credentials retrieved via serial terminal

I've implemented a small WiFi connection procedure into my ESP32 project. The available networks get printed with index, then I'm entering the index and retrieve the network name from it. The password ...
0
votes
0answers
18 views

How does the MKR1010 manage its power?

I recently started this project with a MKR1010, However, I found that when plugging in to the USB port from the MKR to my laptop, everything works fine. But when I start using external power, using a ...
0
votes
0answers
27 views

Adafruit Feather ESP32 - GPIO power drain during deep sleep

I have an Adafruit Feather ESP32 whose GPIOs I use to control an external device. I don't want the device to drain the power of the ESP32 sometimes, so I set the GPIOs to INPUT. When I go into deep ...
0
votes
0answers
21 views

Arduino robot arm movements sudden movement [closed]

Thank you for taking your time to read my problem. I built a robot arm and I control it through Bluetooth from Android device. All works great, but when I use a slider from app for controlling only ...
0
votes
1answer
16 views

GPS module Ublox Neo 6M issue

I using the above mentioned GPS module with Arduino UNO. I find that I cannot receive the Latitude and Longitude values in the $GPRMC string in the NMEA data, as I used the module inside a concrete ...
0
votes
1answer
14 views

NodeMCU with HC-SR04 ultrasonic sensor

How can I interface an ultrasonic sensor with a MCU with 3.3 V GPIO like the NodeMCU? I tried powering the sensor with both 5 V and 3.3 V from the MCU. Both failed to show any results as the distance ...
1
vote
0answers
23 views

Easy way to store Wi-Fi data on Arduino and ESP8266

I'm using Arduino UNO and ESP8266 for my application which has to share data over a public network. At the moment, I hard code the ssid and the password of my Wi-Fi network directly in the Arduino ...
1
vote
1answer
29 views

Wire.h missing - Failing to upload I2C 16x2 LCD sketch

I am total newbie in Arduino and for the last 3 days I am trying to figure this out. I would like to use an I2C display for a project. I have installed the LiquidCrystal_I2C, but when I try to upload ...
0
votes
0answers
26 views

Is NVS storage reset during an OTA update? (ESP32)

I plan to save some settings in the NVS repository of my ESP32, which will also be implemented OTA update. The question arose, will the data in the NVS storage be reset when the OTA update is ...
-1
votes
0answers
16 views

how i can programming send and reserved threw IR INFRARED (COMMUNICATION)? [closed]

how i can programming send and reserved threw IR INFRARED (COMMUNICATION)?strong text
0
votes
0answers
20 views

Serial port not selected [closed]

//TMP36 Pin Variables int sensorPin = 0; //the analog pin the TMP36's Vout (sense) pin is connected to //the resolution is 10 mV / degree centigrade with a //500 ...
0
votes
0answers
17 views

Computer vision without internet connection? [closed]

I want to recognize a purple flower between green grass and to do this I will use computer vision. I read that most used methods is OpenCV but I have a problem. I will use this technique with a robot ...
0
votes
1answer
50 views

How can write a single?

} Book; Book b1 = {"The Zahir","Paulo Coelho",336,0}; while writing this structure inunction but how can write a single data like name of book into structure
0
votes
0answers
8 views

gsm A6 module sms sending problem CME error 58 [closed]

I have to send SMS to mobile CME error 58 my sim there is no pin protected but still, now I'm getting this error
0
votes
0answers
20 views

Can 2 H-Brides be controlled by one Arduino?

The three motors are from windshield wipers, with one of the brushes disconnected in each. The controllers are BTS7960 43A modules One Bridge for two drive motors (speed and direction), and the ...
-1
votes
1answer
55 views
0
votes
0answers
19 views

Communicationg PLC with arduino Uno board [closed]

In my current project I have to communicate with 10 different devices with PLC. PLC is the master. When input comes from PLC to a device, the Arduino controller through RS485, I want to check the ...
0
votes
1answer
27 views

Servo delay problems

So I had a test last week with the Arduino Uno starter kit. We got a task including the servo. I had to get the servo to go from 0 to 90 degrees and it was supposed to use 4 seconds to do so. Than ...
0
votes
1answer
22 views

HanRun HR911105A 17/20 Mini ethernet shield pins Dont have SI

Please somebody who had the same issue help me. The question is how to connect this Mini Ethernet shield to an Arduino. The main problem is the pins that my shield have or haven't; my current ...
0
votes
1answer
40 views

Reading ADS1232 with Arduino

I'm a newbie and I'm trying to read an ADS1232 with an Arduino for a Weight Scale Project. I read data through the SPI interface, but i don't receive the result. #include <SPI.h> #define ...
0
votes
0answers
25 views

Arduino communication by LCD and Keypad

My project is Arduino based. I connect the RX of the first arduino to the TX of the second and vice versa. I want to read the key which is being pressed (two digits) and send these two digits to ...
0
votes
2answers
20 views

Using NodeMCU D8 (GPIO15), D4 (GPIO2) and D3 (GPIO0) pins

I am using a NodeMCU board and have already used 6 digital pins as output for interfacing with the LCD. I intend to use 2 more digital pins, one as input and other as output for interfacing an ...
0
votes
1answer
19 views

Arduino Due - Native/Programming Port [on hold]

I am finalizing a project. I was using the programming port from the beginning and getting ready to change to the native port. I thought it would be as easy as changing my Serial.xxxx to SerialUSB....
0
votes
1answer
32 views

Component with controllable resistance from Arduino? [on hold]

I'm new to Arduino and building circuits, and was wondering if there is a type of component, or some other way to do the following task: I want to control the resistance of a circuit from my computer ...
1
vote
1answer
26 views

How do I supply either (1) dual voltage or (2) negative voltage?

Sorry in advance if this question already exists--I tried to search but my keyword knowledge is shaky. I have created a Colpitts oscillator on breadboard using AA batteries as the power supplies. I ...
1
vote
1answer
51 views

Unexpected negative values from abs() function inline with analogRead

When sampling from A0 with a 0-5V signal on an arduino micro with the code below I get some negative values. int sensor = 0; sensor = abs(analogRead(A0) - 512); Values: 77 25 -74 -58 46 113 -74 102 ...
1
vote
0answers
10 views

QMC5883L automatic calibration

I have a QMC5883L magnetometer, and a pretty basic sketch which just prints the values from X, Y and Z axis to the serial monitor. I want to use it in an application to detect changes in the ...
0
votes
0answers
21 views

RS485 Arduino Communication Issue

Friends, I am trying to achieve half duplex communication between two Arduinos using RS485 Protocol. The hardware I am using is a MAX485 module and an Arduino Uno. I am using the SoftwareSerial ...
2
votes
0answers
25 views

What does “Update of OCR1x at” mean in the WGM table of ATMEGA328?

I just finished a reading a couple of online guides on how to use timer registers with pulse width modulation, so I'm still new to its concept. When I looked in the ATMEGA328 specification sheet, I ...
1
vote
1answer
18 views

.elf and .hex equivalency? (code, eeprom, fuses, and lock bits all in one)

I have all configurations (eeprom data, fuses, lockbits) of my ATMega168A together with the code in my C files. The compilation creates an elf file that I use as an all-in-one programming file for ...
0
votes
1answer
33 views

Using a water sensor with a NodeMCU make it less sensitive?

I'm trying to digitalRead from a water sensor (the one in the picture) using NodeMCU v3,when I try the sensor with an Arduino board it works fine, but when I try it with an ESP8266 NodeMCU v3 it ...
0
votes
0answers
24 views

Music Reactive Fountains

I want to make Music Reactive Fountain. When You say "Holaaaaaa" The fountain (PWM arduino signal) should increase making the fountain reach it's maximum height according to the amplitude of my voice ...
0
votes
1answer
23 views

RGB not working properly

My RGB led is not working properly. It should light up red when the ultrasonic sensor detects more than 10 cm and green when it detects less than or equal 10 cm. It is just blinking red and green at ...
0
votes
0answers
23 views

Totally unresponsive card with RFID-RC522 Module

I bought an RFID-RC522 module including two attached PICC cards: a blue key chain tag and a white card with the type of MIFARE 1KB. In addition, I bought two other separate cards from the same seller. ...
0
votes
0answers
34 views

Count chickens in house [closed]

I want to make house for chickens, and I want to know how many chickens are in house. Have you got idea how to make it? Maybe every chicken will have chip and in house will be some sensor, which will ...
0
votes
0answers
19 views

Arduino Nano with Arduin Nano Ethernet shield ENC28J60

I have connected the Arduino Nano with the Arduino Nano ENC28J60, and then I connect the Ethernet cable with the laptop and also the Arduino nano with my laptop to load the code and it works just fine....
0
votes
1answer
26 views

WS2812B only works while I measure the voltage

I'm going crazy, there is clearly something I'm missing here. I have a NodeMCU V3.0 and a 5V LED strip WS2812B with 10 diodes. I tested this first with a 5V 0.3A power supply, only powering 3 diodes, ...
0
votes
0answers
8 views

Help: Arduino from Bluetooth to LoRa

I need your help. I want a device being able to convert a Bluetooth signal from my phone, into a LoRa signal. In other words, I want to connect to my phone using Bluetooth, to device and send the ...
-2
votes
0answers
23 views

How do we know whether pulses are getting from Arduino are not to mosfet [closed]

Plz answer the question which I questioned
0
votes
0answers
24 views

Reading a tab-deliminated ASCII text at a 9600 baud rate using serial monitor

hope you are fine . I have a problem with reading the data from a device ( cycle analyst ) it outputs a " tab-deliminated ASCII text at a 9600 baud rate" like first it outputs a header line, and ...
0
votes
0answers
30 views

Determine whether Arduino Uno board is faulty or not?

I'm just giving 9V supply to the Arduino Uno but along with its power led, the transmission one is also blinking. Can anyone please tell me whether the board is faulty or not?
1
vote
1answer
44 views

Cannot set MOSI pin low even after ending SPI

I'm building a battery operated device and must shutoff MOSI pin during sleep because it leaks current through the SD card if I don't (about 400 µA). Problem is, it won't stay off. I've looked at ...
0
votes
0answers
17 views

nRF52832 RadioHead library, and Nordic Enhanced Shockburst

I am working with the nRF52832 and need to prototype some radio functionality using nordic's proprietary enhanced shockburst protocol (which they call ESB) - I've worked with the nRF24 quite a bit and ...

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