Unanswered Questions
519 questions with no upvoted or accepted answers
5
votes
0
answers
419
views
DHT22 reading weird values
I just hooked up a DHT22 I had laying around in a parts drawer to test something and it is giving out some crazy wrong values, I am running the adafruit library's unified example and this is the ...
- 19
4
votes
0
answers
471
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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
0
answers
227
views
Using 2 VL53L4CD ToF sensors and getting error after getting first reading
pretty new to arduino stuff and was hoping to get some help with my code.
I'm trying to use 2 ToF sensors and get continuous readings from them. I understand that I have to use the xshut feature and ...
- 31
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
282
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SHT30 giving wrong humidity
I have an SHT30 sensor which is feeding to my Arduino via an RS485 connection. The readings are coming in as they should be for both temperature and humidity. The problem, however, is that the ...
- 131
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
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
1k
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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
3
votes
0
answers
4k
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MEGA2560 + SIM900A - constantly blinking, not responding
Recently I got new Arduino Mega 2560 and GSM/GPRS module - SIM900A v3.8.2.
I live in Europe, so I flashed European firmware for SIM900 and it was working OK (sending SMS, receive calls, sending http ...
- 2,522
3
votes
0
answers
242
views
Why doesn't PWM work on arduino in this code?
I am trying to control a dc motor speed with PWM. When I test it with simple program like spin in one direction with set PWM value it works. If PWM>70 the motor will start spinning and max is 255.
...
- 2,522
3
votes
0
answers
871
views
Serial Communication with two bluetooth modules on Arduino Mega
I'm trying to communicate with two bluetooth module (RN-42) on the Arduino Mega.
I studied about Serial communication in Arduino, and I used Serial1, Serial2 to get information at the same time from ...
- 2,522