All Questions
0
votes
0answers
6 views
ADXL345 I2C setup not returning anything
My hookup is like this:
GND - GND VCC - 5V CS - 5V SDO - GND SDA - A4 SCL - A5
Here is the code:
#include <Wire.h>
#include <ADXL345.h>
ADXL345 accelerometer;
void setup(void)
{
...
0
votes
1answer
9 views
Do I need more voltage to close this circuit?
I'm hacking together a RF-controlled garage door opener. I'm tapping the "receiving" end in to the push button wires.
When the two wires touch, it toggles the garage door motor.
I'm trying to ...
0
votes
0answers
4 views
NodeMCU - Star Configuration Broadcasting
I'm trying to have a central NodeMCU device that broadcast data out to multiple NodeMCUs so basically a star configuration. I'm aiming to have each NodeMCU receive the data on their end and display ...
0
votes
0answers
15 views
Hex file to ino file? [duplicate]
I need to convert a hex file back to an ino file, so I can edit my 3d printers settings in the arduino ide. How can this be done?
0
votes
1answer
12 views
WiFi thermometers: save different location string as const across many devices
I've built a very simple WiFi thermometer out of an Adafruit ESP8266 HUZZAH breakout board and a TMP36 temperature sensor. I have it reporting the temperature over wifi to my computer which will be ...
0
votes
0answers
17 views
Parsing GET function + ESP8266 + ARDUINO IDE
I am working on a ESP and making it a simple Http web server. I have successfully ON/OFF the led using the browser. I need to use PWM, instead of Switching the led. As of now When I hit http://192.168....
0
votes
0answers
6 views
MPU6050 hanging/freezing
I am really short of interrupt pins on my arduino cause I have a project that already uses a lot of arduino pins and to read DMP data from MPU6050 you always have to use an interrupt pin. I searched A ...
0
votes
0answers
5 views
Force sensitive resistor data logging with Flora and BLE
I would like to swap out the light sensor in this Flora BLE data logging tutorial for a force sensitive resistor. https://learn.adafruit.com/datalogging-hat-with-flora-ble/overview
Can anyone help ...
0
votes
1answer
11 views
how to interface WCS2750 with aurdrino to make an automatic feeder for a masala chakki (MILL)?
it senses the current and rotates the shaft of a auger dispenser (like used in a cat feeder) using a servo motor to make it fully automatic and efficient.
and turn off the motor when there is no load ...
0
votes
1answer
18 views
How to properly receive data from accelerometer @ arduino in processing and map it?
I'm busy making a project where my accelerometer @arduino can controle a ellipse @processing
But the problem is, it doesn't work. With the code I have now, I can receive the data from the ...
0
votes
3answers
27 views
How can I understand the circuit diagram for Arduino Starter Kit Project 4?
I have acquired the arduino starter kit project book, and the explanations seem at times confusing and difficult to understand.
Concerning the above circuit diagram, the book states (I am ...
0
votes
0answers
17 views
Rewrite Arduino Code for NodeMCU - EEPROM Issues
I'm trying to rewrite the following code to work on the NodeMCU, I know that EEPROM behaves differently there I have changed it as follows, but it is still not saving to EEPROM is there something I am ...
0
votes
2answers
40 views
Need help to set PWM frequency to 25kHz
I currently can set four pwm pins to around 31kHz with the following code:
void setup()
{
TCCR1B = TCCR1B & B11111000 | B00000001; // Set PWM frequency for D9 & D10 :
pinMode(...
0
votes
1answer
8 views
MPU9250 - Calibration Not Saved with RTIMULib EEPROM Issues
I'm using the MPU9250 and the RTIMULib to perform sensor fusion, however, when I run ArduinoMagCal, and save the calibration, and follow that with running the main ArduinoIMU it claims the calibration ...
0
votes
1answer
15 views
Can I connect a camera to an arduino mini?
I was wondering if it was possible to connect a camera like this to on arduino mini and have the arduino save video and audio to a micro SD card
0
votes
1answer
27 views
Sleep and Wake Arduino according to LDR interrupt
I have to sleep the system in the night and have to wake the system in day time. I am using LDR to get input. LDR input is connected to interrupt pin 0 of Arduino Uno.
Here is my code.
#include <...
0
votes
2answers
30 views
How can I generate a sinewave with Arduino Uno?
I would like to generate a sine wave with my Arduino Uno. As far as I know, there is no library for Uno to generate such a signal (correct me if I'm wrong), so the only option available is to write a ...
0
votes
1answer
16 views
Want to create bluetooth audio control (volume up/down, play, pause, etc.) for smartphone
I want to create a bluetooth remote audio control to control smartphone audio, essentially identical in function to this type of equipment:
https://www.amazon.com/FAVOLCANO-Bluetooth-Button-...
0
votes
1answer
39 views
How can you reduce the clock frequency of an Arduino Mega?
I'm trying to debug a problem and need to reduce the speed of the clock on my Arduino Mega from 16MHz to 8MHz.
I can't find any simple way of doing so, so I wanted to know if there were any gurus ...
0
votes
0answers
20 views
Casting values larger than 0x7F as a CHAR
I'm writing some code and came across an odd issue. I was writing a checksum routine that accepts an array of chars and returns a char as the checksum value.
I was testing the value returned by ...
0
votes
0answers
13 views
Programming attiny13; target doesn't answer
I created my own board with a ATTiny13 and ISP header. When I tried to program the chip, using an USBasp, I go the error message target doesn't answer. 1. Specifically:
gerben@hackintosh:~ $ avrdude -...
1
vote
1answer
31 views
Arduino Uno: Pullup Resistor
I have been reading a bit about the internal pullup resistor. I know from past projects in school that resistor themselves are fragile (burnt one by accident due to higher current than was made for).
...
0
votes
1answer
13 views
Ethernet Controlled Arduino Arm
Good day, I am currently attempting to write code that will allow a user to connect to an Arduino Mega via ip address and control a robotic arm on the X and Y axis as well as open and close the claw. ...
1
vote
2answers
25 views
Linker error when trying to use functions in separate header and source files
It is my first day of working with Arduino (it is a Due). I want to read from TMP102 through I2C. I wrote some code and it works just fine. But now I want to separate the TMP102 code from the main ...
-4
votes
0answers
26 views
ARDUINO WAVEFORM GENERATOR
I intend to design an Arduino Waveform Generator interfaced with the Nokia LCD 5110 with Keypad support.
I have successfully incorporated the Keypad interfacing part but have stumbled upon waveform ...
1
vote
1answer
44 views
Unable to replicate Arduino code into ATmega8 code
I am trying to replicate an LTC Audio Decoder code from Arduino Uno into AVR ATmega8 which I got from here.
My Arduino Uno code is working great. Here is my Arduino Uno code:
#define one_time_max ...
1
vote
1answer
25 views
Strange RPM Readings on Teensy 3.2
While trying to read RPM from a computer fan using the 4-wire protocol, I am getting strange readings. +12 and GND from the fan are connected to a power supply, and the tachometer to the PIN-0 or a ...
1
vote
2answers
26 views
Average response time of Esp8266 module
I'm planning a project where I'd like to control an RC car with Arduino and an Esp8266 module.
A software running on a computer would read the input from an USB analog controller and send the data ...
1
vote
2answers
49 views
Arduino as an automation controller
I am considering using an Arduino as a controller for a water treatment system and would love to hear your opinions. All it has to do is open/close a water gate (by starting/stopping a motor) at ...
0
votes
1answer
19 views
Not able to upload program to “Arduino Due”
I'm not able to upload sketch on Arduino Due, using Programming Port.
Even blink sketch from examples is not working. So tried with blank sketch, I got following messages.
0
votes
0answers
25 views
ESP12F, Arduino IDE vs LUA vs Native SDK [duplicate]
Which one is the most efficient?
Is there any downside of using arduino ide instead of NodeMCU with lua script or Native SDK?
Pro's and Con's of each.
1
vote
1answer
25 views
Distance finder technology 0-24inches
Can anyone point me towards whats best for relatively low cost distance measuring in the 0-36" range (or 0 - 1m range) with 1/16"/1mm accuracy. My initial approach was going to be to hack a laser ...
0
votes
0answers
9 views
Can the BNO055 sensor detect orientation while shaking?
If I'm shaking my BNO055 sensor while detecting the orientation will the orientation value be right?
0
votes
0answers
29 views
I want to generate 10khz frequency on arduino uno pin 9 while reading analog pin A0 while running simulation from simulink model [on hold]
I want to generate 10khz frequency on arduino uno pin 9 while reading analog pin A0 while running simulation from simulink model.
without programming arduino and without accessing timers and only ...
0
votes
0answers
7 views
Similar to the BNO055 sensor?
I kept searching for the BNO055 sensor in my country. Unfortunately, I didn't find it, and I don't want to pay additional shipping fees. Is there something similar that I can use the adafruit ...
0
votes
0answers
29 views
Can't select serial port on the IDE (Ubuntu)
I am aware that similar questions have been asked, however I haven't found an answer to my specific question.
When I connect my Arduino (Uno) to my USB port, the on light on the board comes on (and ...
0
votes
1answer
18 views
Calibrating ESC and then using it
i have 30Amp ESC which i can move motor by providing values ,
but i am unable to know what is the minimum and maximum throttle speed of the motor....
how to achieve that level of info through ...
0
votes
0answers
10 views
Low cost, low energy BT receiver that can be triggered by smartphone ? (no serial com req.) [on hold]
Hi I am looking for a simple BT receiver device that can provide a simple digital output signal when a BT connection is made to it, and it should be low cost and low energy use if possible. Does ...
