Questions tagged [adafruit]

Adafruit Industries is an open-source hardware company founded by Limor Fried in 2005. Use this tag to mention issues with Adafruit products or tutorials.

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LCDs interfere with Adafruit datalogger SD card function

I am using the Adafruit datalogger shield (Rev B) and a pair of cheap 20x4 LCD I2C displays. The displays have a small I2C I/O expansion module board on the back. The LCDs I am using are these; ...
Scott M's user avatar
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1 answer
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HMC5883L - Tilt compensation without Accelerometer

Trying to get an HMC5883L to compensate for being installed in 90 degrees. Doesn't seem to me that it'll need too complex math or accelerometer. But I have no idea how to do the compensation for it. ...
Noam Zomerfeld's user avatar
2 votes
2 answers
901 views

Library for DIY Keyboard

I'm planning on making my own Bluetooth mechanical keyboard using the Adafruit Feather 32u4 Bluetooth LE. Something that I haven't really figured out is the programming side of things. I was wondering ...
JanG's user avatar
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Adafruit_NeoPixel define pin for different setups

I am looking for a way of defining multiple pins for my RGB strips. Currently the defined variable is set with the pin within it. This works just fine if I only had one RGB strip connected to the ...
StealthRT's user avatar
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1 answer
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Adafruit CC3000 Wifi Shield on IRQ 2?

I'm using an AdaFruit CC3000 Wifi shield as an HTTP server with an Arduino Uno. I have a script which works fine -- logs into my Wifi and listens for connections as it should. However, I want to ...
brianfit's user avatar
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1 answer
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Having issues understanding what "#define GET_STATUS" does

I am trying to use a Waveshare 4.2inch e-paper display with an Adafruit Feather Adalogger M0, but am having issues with two separate instances of #define GET_STATUS being defined differently in ...
BeingPool's user avatar
2 votes
0 answers
293 views

Flash HEX onto an Arduino board

The scenario: I have built a device off an Adafruit nRF52840 and I need a way to deploy firmware updates. I have delivered the device to my end user and will need to periodically send him updates. I ...
Seamus's user avatar
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1 answer
182 views

Adafruit OLED 7-pin display - Abbreviations

I can't remember for the life of me how exactly I set up this screen in previous models, partially because the references I'm using in my code have different names from the pins on the Adafruit ...
Tyler Wallentine's user avatar
2 votes
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569 views

Send sensor data through GATT with Adafruit Bluefruit

I have the BLE Module Adafruit ItsyBitsy nRF52840 Express and I want to send sensor values from a Hallsensor to my computer. I was able to have the right data checking with the Serial monitor. int ...
Hanuman's user avatar
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Why doesn't LCD 16x2 work with fingerprint sensor code?

When I separate fingerprint code and LCD code it works fine. sensor read 6 templates which I already stored 6 fingers ID. When I combine the code it read 0 templates. #include <Adafruit_Fingerprint....
SASHA SYAZANA 's user avatar
2 votes
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351 views

Code stuck on mag.getEvent(&event); in HMC5833L Compass

Last week I created some code in which I can run a Ublox GPS NEO-6 and a magnetometer HMC5883L together. Which at the time worked brilliantly. Yesterday I have attempted to run the code again, with ...
Ashaal Aalam's user avatar
2 votes
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415 views

Adafruit Huzzah Feather not resetting and serial monitor garbage

Hi there, I have an Adafruit Huzzah Feather project laid out as you can see in the diagram above. Currently I am having trouble getting it to reliably reset and start the sketch. More often than ...
gfte's user avatar
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367 views

Wiring Feather Huzzah ESP8266 to Monochrome 1.3" 128x64 LCD

I'm new to Arduino and the pinouts for the Adafruit 938 LCD doesn't seem to match the pinouts that I looked up for the Huzzah ESP8266. Does anyone know the proper pinout for this display and the ...
iw0542's user avatar
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2 votes
0 answers
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Turn on one by one the LEDs of a Neopixel rgb LEDs strip for each detection at the same distance from an Ultrasonic Distance Sensor (HC-SR04)

For this project I seek to create a counter of water glasses we drank throughout the day. I use for this an Arduino UNO card, a Piezo buzzer and a Neopixel rgb LEDs strip (5 LEDs for this test). ...
Thibaut's user avatar
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172 views

Is something wrong with my Adafruit motor shield?

I think something may be wrong with my shield, as I looked at the other forums related to this question and still can not get help. I know that I can't run it from a 9V source by itself, as the ...
Bob G.'s user avatar
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Upload custom trinket firmware

I'd like to disable the trinket 10-second bootloader when powered up, so it will just begin running the program. I would still like to be able to press the reset button to re-program it. I found an ...
EatonChips's user avatar
2 votes
0 answers
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How to attach Arduino MKR1000 to a shield meant for Arduino UNO?

I have an Arduino MKR1000 and need to interface it to an Adafruit Music Maker shield, which has pinouts for an Arduino UNO. Maybe I'll have to attach female headers, and then jumper pins over. Which ...
Doug Null's user avatar
  • 201
2 votes
2 answers
186 views

Problem with wrapping Adafruit Motor Controller function calls in a class

I'm working on an Arduino robot and I ran into a problem when reorganizing my code. I have an Adafruit Motor Shield v2.3 connected to an Arduino Uno. My robot can be controlled using a bluetooth ...
hubbabubba's user avatar
2 votes
0 answers
184 views

Debugging arduino shield for varying voltage

I'm using this motor shield for arduino from adafruit. It says it can drive 4 DC motors with it. However, two terminals M3 & M4 (as marked in the image) seem to be supplying lesser voltage. To ...
loxxy's user avatar
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302 views

Adafruit Trinket 3v with LED matrix backpack producing error

I have been wanting to create a Arduino watch. I built the circuit with an Adafruit Trinket 3v and an Adafruit LED matrix backpack (8*8). When I try to upload this example code: /*********************...
Merlin04's user avatar
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Refine Colorview Code

How would I refine this to only recognize red and green? I don't need the full functionality of this code, just the ability to distinguish between red and green, and output that respectively. I also ...
Dan Wilkes's user avatar
2 votes
1 answer
609 views

Adafruit TLC5947 breakout board is not working with my Arduino Uno

I am trying to use this board (setup tutorial on left hand nav) with my Arduino Uno. I have tried using their example code, as well as my own simplified code, to turn on a single blue LED. The ...
jros's user avatar
  • 23
2 votes
1 answer
890 views

Execute Code sent over Serial

I was wondering if its possible to send code to the Arduino, and then have it execute this code. What I'm trying to do is use an Arduino Mega with a bunch of stuff connected to it send code to an ...
Will's user avatar
  • 23
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1 answer
2k views

Adafruit_GFX setRotation not working when called from within a class

Using an ILI9341. I'm trying to set the rotation from within a class, but it's not working. The code is very straight forward. If I rotate in the class, the setRotation code does not work but the ...
AWF4vk's user avatar
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0 answers
1k views

Adafruit motor shield 1 and Arduino Pro Mini

Can any one tell me how to connect Adafruit motor shield v 1.0 with Arduino Pro Mini 5v 8 Mhz. Motor shield uses which pins as I want to replace my Arduino UNO to Pro Mini and need re-wiring. Tried it ...
Builder's user avatar
  • 195
2 votes
0 answers
645 views

Sparkfun Red board and CC3000 shield not allowing multiple HTTP_GET requests.

I have a SparkFun Red board (Arduino Uno R3) with a SparkFun CC3000 shield attached. I am trying to post data to the "data.sparkfun.com" service in order to test a basic Wifi data logger. I am using ...
Cloudedturtle's user avatar
1 vote
3 answers
2k views

Adafruit Neopixel Library- only the first 16 LEDs respond

I am using Adafruit Neopixel Library to work with a strand of 21 RGB LEDs. AT this point only the first 16 light up. It is not a soldering problem, battery issue or a short. This troubleshooting page ...
ksenia's user avatar
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1 vote
1 answer
1k views

How to use capactive touch on Adafruit board in Arduino mode?

I have a Trinket M0 which has three pins capable of capacitive touch, A0, A3, and A4. When using CircuitPython on these boards you can use the CapTouch Library. But as far as I can tell this does not ...
Kyle's user avatar
  • 113
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1 answer
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Schematic for the adafruit motor shield v2.3

I am trying to locate a schematic for the Adafruit motor shield v2.3. It has many ports and currently I have found little to no explanation of what is on the board. I located this picture which ...
Hojo.Timberwolf's user avatar
1 vote
3 answers
167 views

Arduino Shield on Breadboard

I would like to ask if I can stack directly Adafruit PN532 RFID Shield onto my breadboard. Or do I need something for that? Thank you.
Amirul Farhan's user avatar
1 vote
2 answers
273 views

Is my board broken by soldering?

I've soldered a featherwing on my feather, then unsoldered it because it had stopped working: after the soldering of the featherwing, I was unable to upload new software to the board. But now that ...
antoyo's user avatar
  • 113
1 vote
2 answers
7k views

Exit status 1 expected primary-expression before ']' Arduino

Here's the whole error: Arduino: 1.6.7 (Windows 7), Board: "Arduino/Genuino Uno" *\readMifare\readMifare.ino: In function 'void loop()': readMifare:113: error: expected primary-expression before ...
Dahacker305's user avatar
1 vote
2 answers
950 views

error: 'CLASS' does not name a type only when creating object inside another object

I'm trying to use Adafruit's LED Backpack library within a custom class. When I use the Adafruit library directly within a sketch, it compiles fine. When I use an example sketch provided with the ...
lawnmowerlatte's user avatar
1 vote
1 answer
291 views

Will an Arduino Nano work instead of Teensy 3.2?

I hope this is ok to post here and I appreciate any suggestions or help and opinions/facts to make this work. First off I’ve Never programmed an Arduino device! I was looking at this project: https://...
Sundrop's user avatar
  • 19
1 vote
1 answer
220 views

Reading & writing a configuration file on an Adafruit Circuit Playground Express

I would like to store an application's configuration in a file stored on the Circuit Playground Express (CPX) flash. The application itself needs to be able to update the configuration file. Things I ...
user3308886's user avatar
1 vote
1 answer
5k views

Is there an Adafruit function to invert the colors of my screen for Arduino language?

I am trying to invert the color of my OLED display screen once a button is pushed. I have the button situation figured out but I can not find a function that inverts the color. I am using these two ...
Santiago Restrepo Serna's user avatar
1 vote
1 answer
2k views

Increase sample rate in ESP32 board

For my final project on the university as a Systems Engineer, I'm working on a "electronic stethoscope", which is giving me a lot of headaches. I bought a Adafruit Feather ESP32 Huzzah (https://learn....
Mauro Bilotti's user avatar
1 vote
1 answer
549 views

add ID number to the feather m0 bootloader (flash)

I'm trying to add a serial number to the bootloader's flash area of Adafruit Feather m0 board. Seems like feather m0 0-0x2000 area on the flash is non writable by the arduino sketch. i wanted to add a ...
codeScriber's user avatar
1 vote
1 answer
505 views

Undervoltage from solar panels

So i'be been toying with the idea in my head of creating a solar powered weather station with an arduino, two 6V 2W solar panels in parallel, two 5V USB battery packs, and an adafruit module which ...
patrick jackson's user avatar
1 vote
4 answers
799 views

Reduce 5v Trinket Pro to 3.3v?

Apparently these nRF24L01+ modules need 3.3v, but I've only got 5v Trinket Pros that I'm using. How can I reduce the voltage to the RF transmitter? Would a voltage regulator work? Specifically ...
Shpigford's user avatar
  • 484
1 vote
2 answers
15k views

Sample code for using adafruit servo shield?

I would like to control 16 motors with a servo shield, however, I have found scant to nothing sample code online. The one I was able to find is...strange to say the least https://github.com/kachok/...
Fraïssé's user avatar
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1 vote
2 answers
995 views

HX711 Ridiculous speeds

I'm using a SparkFun HX711 board and an Adafruit AdaLogger (M0) Featherboard. I have cut the trace on the back of the HX711 to get a faster data rate (should be about 80 sps). I did this by reviewing ...
Diesel's user avatar
  • 144
1 vote
1 answer
334 views

Using software Serial for Adafruit Thermal library and more general cpp question

I'm working on a proof of concept for using the Adafruit_Thermal printer library with an ATTiny85. The ATTiny85 does not come with hardware serial capability, so I started looking into using ...
Chris Schmitz's user avatar
1 vote
2 answers
2k views

Arduino NANO hardware SPI not working

I have an Arduino NANO clone and a 2.4" ILI9341 TFT display. The VCC and LCD pins of the display are connected to the 5V pin of the board. The GND to the GND. All the logic pins are connected to ...
Peter Varo's user avatar
1 vote
1 answer
135 views

Adafruit Feather 32u4 FONA KEY Pin

I received a Adafruit Feather 32u4 FONA as a gift and have read the great, comprehensive document Adafruit put have put together surrounding pinouts, examples etc for the board. I am having issue ...
nagrom97's user avatar
  • 115
1 vote
2 answers
869 views

Too many amps for Step motor

I have an adafruit motor shield and attached the Nema 17 stepmotor. Now the big problem is trying to power it without it overheating. I was originally using a 12v 6a power supply but quickly switched ...
Hojo.Timberwolf's user avatar
1 vote
1 answer
1k views

Configuring Accelerometer on BNO055 sensor

I'm using the BNO055 9DOF Adafruit sensor to measure the acceleration/orientation. How can I change the configuration of the accelerometer from 4G (default) to 16G? What I already know: The ...
Docopol's user avatar
  • 11
1 vote
1 answer
206 views

The sensors don't send correct data

I try to make a weather station, but I don't understand why it doesn't work. I had tried to read a lot of the sensors but I doesn't find my errors. The code: #include "DHT.h" #include "...
Rogelio Olarte's user avatar
1 vote
1 answer
363 views

What is the point of a adafruit data logger

In order to play an audio file, I was suggested to get an Adafruit data logger, yet right now I am stuck with the project and I realized that I'm not using the data logger to its full potential. Yet ...
Daniel's user avatar
  • 59
1 vote
1 answer
763 views

How do I stop 5v on the I2C port of a pro mini so I can use 3.3v devices?

The theory is that you can use 3.3v I2C devices from a 5v device as long as the pull ups are only to the 3.3v. I have a 5v pro mini connected to a bmp180 board which has a 3.3v regulator but no level ...
BillyBag2's user avatar
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