Unanswered Questions
528 questions with no upvoted or accepted answers
4
votes
0
answers
718
views
ArduinoDue - Matlab: SerialUSB.write() sends ASCII?
I'm trying to get some binary data from an Arduino Due to Matlab.
Basically this is the setup:
Due:
byte usbMsg[33]= {0};
// filled with dummy as example
usbMsg[1] = '00000001';// in[3];
usbMsg[2] =...
- 2,522
4
votes
0
answers
471
views
Problem in using COZIR W-100 with arduino
I was using the COZIR W-100 carbon dioxide sensor with an Arduino Mega 2560 with the example code from this site.
But the measured value of carbon dioxide by sensor was 90 ppm in fresh air and that ...
4
votes
0
answers
175
views
Can d2xx connect to an arduino mega 250?
I am trying to replace a device which used a FTDI chip (http://www.ftdichip.com/Drivers/D2XX.htm) to get USB to serial. I need some more code on the chip, so I want to use an arduino mega 2560 instead....
- 41
4
votes
0
answers
7k
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Arduino GSM receiving text and then storing value as a variable in code
I am using an Arduino Mega board with a SIM900 GSM.
My goal is to be able to text the GSM with a value of two digits (ex: 79) and then store that value as a variable in the code. I know how to set ...
4
votes
2
answers
137
views
Turn ESP8266 into an Arduino IDE-like "sketch uploader" (over hardware serial)
I have an ESP8266 module which has downloaded a hex file for an Arduino Mega2560. This hex file (call it mega2560.hex) is sitting in the ESP's SPIFFS file system. What I want to do is basically ...
- 18.2k
3
votes
1
answer
151
views
Arduino R3 Uno Clone - When barrel plug connected there is 5V on USB. Why?
I have been using Arudino Megas for some projects and never had this problem.
Simply enough - I am powering arduino with 12V in via barrel and take power out via VIN to 12V low very low current small ...
CommunityBot
- 1
3
votes
0
answers
490
views
Integration of MAX30100 and DS18B20 Thermal Probe Integration
This is for my final year project that I have been tasked with designing a patient monitoring system. However, during the last stretch of model prototyping, I am experiencing issues with my MAX30100 ...
3
votes
0
answers
204
views
Black screen when using higher SPI-speed for RA8857 LCD-controller
I'm using an Arduino Due that talks via SPI to an LCD (800x480) with the RA8875 controller chip.
The most recent datasheet I could find is: RA8875 datasheet.
Everything works as expected when using ...
- 155
3
votes
0
answers
2k
views
BLE HM10 - Set Password - Android Pairing Problem
I have developed an application on Android, which connects to a Bluetooth HM10, launches commands, and turns LEDs on and off through my Arduino. All of this works properly.
So, I want to make ...
3
votes
0
answers
713
views
Getting atsam3x8e (Arduino Due) to work
I decided to make a pcb based on the atsam3x8e (microcontroller used in Arduino Due). For the design I copied most of the layout that I found on this site and looked at the official Arduino Due ...
3
votes
0
answers
2k
views
How to extract fingerprint template from Arduino Fingerprint Sensor
How to extract fingerprint template from Arduino Fingerprint Sensor and store it to SD card module using adafruit library and then search/import it from SD card module when tapping the fingerprint?
...
- 610
3
votes
1
answer
2k
views
Creating a sine wave with a DAC and feeding it back
I want to produce a digital sine wave, send it to DAC0, and then receive it back as input on A0 and plot the graph. I am using an Arduino Due. I wrote the following code:
#define maxSamplesNum 120
#...
CommunityBot
- 1
3
votes
0
answers
400
views
Software flashing attiny167 from RPi with avrdude
I am trying to flash a program onto an attiny167
(already bootloaded with the micronucleus bootloader)
with a Raspberry Pi via avrdude and USB.
Background
I have 50 Raspberry Pi 3B's connected to an ...
CommunityBot
- 1
3
votes
1
answer
1k
views
Arduino Mega2560, Ethernet Shield & OV0706: "Camera not found"
I want to take a picture with the OV0706 and save it to an SD card. I'm using an Arduino Mega2560, Ethernet Shield (with SD slot) and an OV0706. I tried the tutorial for this camera from Adafruit, but ...
CommunityBot
- 1
3
votes
0
answers
2k
views
How to control relay using SIM800 and Arduino Mega through SMS?
For my project I need to control relays through SMS and now I can send SMS from my SIM800 module which is connected to Arduino Mega R3. But I tried several shapes for AT commands to receive SMS and ...
- 15