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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Is it possible to use Adafruit's Circuit Playground Express's 2MB storage in Arduino IDE?

I understand that the extra 2MB of memory is for circuit python. However, I wouldn't mind having access to 2MB of storage and using the Arduino IDE/low level C to access it. Is that possible? If so,...
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1answer
34 views

Trying to understand AccelStepper constant speed

I'm starting to learn the AccelStepper library for controlling stepper motors for a project I'm working on. I'm able to get the stepper motors running with the basic examples that use acceleration. I ...
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2answers
61 views

GPS date and time not displaying correctly in Arduino Uno,NEO6M GPS module

I am learning how the Arduino and GPS module work so I can apply it to another project. My components are an Arduino Uno, NEO-6M GPS module, and a Adafruit 1.8" TFT display. The code did not work ...
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43 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 ...
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Can anyone find out why when I run this code for a GPS and BME680 sensor I have no errors but nothing happens

Here is the code #include <Wire.h> #include <SPI.h> #include <Adafruit_Sensor.h> #include "Adafruit_BME680.h" #include <SoftwareSerial.h> #define BME_SCK 13 #define ...
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Adafruit v2.3 Motor Shield Initialization Failure

I would appreciate any help solving this as I have spent several hours trying to debug. My code seems to stop when I get to the initialization of the motor shield. motorShield.begin(); #include <...
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41 views

Circuit Playground Express & Atmel Studio 7: Issues compiling binary file

I am having trouble compiling a binary .bin file that runs on the Adafruit Circuit Playground Express via Atmel Studio 7. Context: I created an Arduino ino sketch in the Arduino IDE. The code in the ...
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1answer
51 views

Trying to draw a bitmap to an LED matrix only draws the left half

I'm EXTREMELY new to Arduino and fairly new to programming as a whole, but I thought it would be fun to try and write a program that draws arbitrary 1-bit bitmaps to an LED matrix using the Adafruit ...
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47 views

Periodic noise on ESP32 ADC

I've got an Adafruit HUZZAH32 ESP32 feather board connected to my PC via USB and I'm trying to read from a voltage divider at ADC1 channel 0, powered by the 3V pin. For troubleshooting, I'm using two ...
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45 views

Arduino Atmega32U with nRF51 BLE by Adafruit limited to 5 second update rate?

Would like to ask for assistance with the code below. It's the Adafruit Bluefruit Atmega32U LE module with Adafruit's Arduino IDE example "heart-rate monitor" sketch. The code uses the hardware SPI ...
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22 views

Feather will not work if GPS is attached

I have a feather huzzah, and a feather GPS shield. The feather will not accept program code while the GPS is plugged in. I have determined this is some sort of power issue. I have a battery connected ...
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60 views

Arduino Nano 33 BLE work with its Bluetooth and GPS synchronously?

I am using Arduino nano 33 Sense BLE in which I want GPS to run and display its location . The GPS module which I am using is Adafruit GPS. I want both Bluetooth and GPS to run synchronously. But only ...
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1answer
37 views

With the press of a button, I need to play an intro sound file, then one of 50 other sounds in order, each time a button is pressed

I need to play an intro file and one of 50 different files after it in order each time the switch is pressed, with a short delay between the intro and next file. For example let's say the intro is ...
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31 views

Need help Coding Adafruit v1 motor shield for 3 DC motors [duplicate]

My project is that I am building an animated (singing, dancing, head turning, and arm waving) snowman. I have 3 DC motors for individual functions that are to be run via Arduino Adafruit V1 card ...
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1answer
14 views

Does Adafruit PowerBoost 1000 Charger support data transfer?

As the title says - Does Adafruit PowerBoost 1000 Charger support data transfer? I mean that if I connect USB on one side to PC and Arduino on other side - can I still program it and get serial ...
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36 views

Load Adafruit GFX bitmap fonts on desktop for pixel-level design

I am designing UI for 160x128 ST7735-based TFT display which will be displayed using Adafruit's GFX library (and the driver in Adafruit_ST7735.h). I am using the default bitmap font (custom fonts don'...
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STM32F103 (Blue Pill) with stm32duino + BME280 + SSD1306 strange behavior

I'm going crazy trying to understand some strange reads from BME280 sensor. With this code: #include <SPI.h> #include <Wire.h> #include <Adafruit_GFX.h> #include <...
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1answer
68 views

How to create and edit fonts for the Adafruit GFX library?

I noticed that the TomThumb.h font included in the Adafruit GFX library has characters that have different widths, which is a problem for me because I'm doing text processing that requires characters ...
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1answer
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Adafruit motor shield v1 Need help Running 3 DC motors simultaneously?

My project is that I am building an animated (singing, dancing, head turning, and arm waving) snowman. I have 3 DC motors for individual functions that are to be run via Arduino Adafruit V1 card ...
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2answers
22 views

Adafruit Metro Mini FTDI chip overheating

I have an Adafruit Metro Mini board that I am using. After soldering the board and accessories to a perfboard the FTDI chip is overheating, the COM port will not show up on the PC, and the 3V pin does ...
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37 views

Subscribing to Bluefruit LE Friend with ArduinoBLE not working

I've been using an Arduino Nano 33 BLE to communicate with my PC over the BlueFruit LE Friend's UART characteristic. Using the default ArduinoBLE library, I'm able to connect to the BlueFruit from the ...
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1answer
17 views

Problem communicating with GSM module which is a Fona 3G from adafruit

My issue is fairly simple to describe but I have no idea what the problem could be. So I got my FONA 3G and immediately after taking it out of the box, I connected the battery and I wired up my FTDI ...
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2answers
40 views

Using SDA and SCL with analog inputs at the same time

I'm trying to build a robot arm based on Arduino UNO and PCA9685 controlled by few potentiometers. The easiest way that I figure out and find on internet is using two Arduino's, one as master and ...
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1answer
36 views

ADXL345 gives wiring error in SPI mode

I get the following output from serial monitor when trying to use the ADXL345 with Arduino Uno in SPI mode (I2C mode works fine): CA Ooops, no ADXL345 detected ... Check your wiring! See photos for ...
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32 views

Adafruit 2.8 TFT LCD Touchscreen 4 wire pins - unclear instructions

Warning - Noob question I am trying to follow the instructions provided by the vendor https://learn.adafruit.com/2-8-tft-touch-shield/touchscreen-paint-example to no avail. Specifically: We ...
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1answer
96 views

Why are my motors attached to an Arduino MEGA not running?

I verified my code and uploaded it to the board and that was successful. Info: - Using Mega 2560 Arduino Board with Adafruit V1 - 3 DC 12 volt motors - on HP computer Here is my code: #...
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2answers
69 views

Trouble making my 12v dc motors run on my Mega 2560 Arduino [closed]

Can someone review my code to see if the code is the problem? If nothing is wrong with the code, can someone look at my image and tell me if I set up the shield and the motors wrong and see if that's ...
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1answer
92 views

Im having another problem with my code the error is "redefinition of 'AF_DCMotor motor'? [duplicate]

Heres the code #include <AFMotor.h> AF_DCMotor motor(1, MOTOR12_8KHZ); AF_DCMotor motor(2, MOTOR12_8KHZ); AF_DCMotor motor(3, MOTOR34_1KHZ); void setup() { Serial.begin(9600); Serial....
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37 views

SI5351 Breakout 153,600Hz Square Wave Signal

I'm trying to generate a consistent 153,600Hz square wave signal with 50% duty cycle from a Adafruit SI5351 3.3-5v breakout board for use as a fixed synchronous serial clock reference, but the closest ...
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1answer
45 views

DC Motor doesn't turn and a beep sound is made, also there is a burning smell

I was trying to drive a single dc motor with L293D Shield and Arduino Uno #include <AFMotor.h> #include <SoftwareSerial.h> AF_DCMotor motorLeft(3); AF_DCMotor motorRight(2); unsigned ...
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39 views

Fingerprint not detected

I'm currently trying to integrate my ESP32 Module (as in https://cdn.instructables.com/FOL/YWLI/JEOILQ5U/FOLYWLIJEOILQ5U.LARGE.jpg) with Fingerprint Sensor(R307) using the Adafruit Fingerprint Library....
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1answer
205 views

how can i conect a lipo charger to a teensy 4.0?

I have the battery charger product https://www.adafruit.com/product/2124 and a teensy 4.0, that I would like to use to power it. what, if any pin would I connect from bat, to the teensy? Its my ...
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1answer
33 views

Adafruit thermal printer prints weak

I am currently hooking up my arduino to an adafruit mini thermal printer. When a button is pressed, some code is executed which then sends some information to the thermal printer. Everything works ...
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47 views

adafruit rfm95w and sd card

I am looking to use the adafruit rfm95w(https://www.adafruit.com/product/3231) on top of the adafruit huzzah esp8266(https://learn.adafruit.com/adafruit-fea ... 6/overview) and an SPI sd card breakout....
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1answer
31 views

i am having Strange issues when trying to read form gps serial connection

I have an Adafruit Ultimate GPS connected to a MEGA2560. I am trying to get the data from the buffer and do other data processing at the same time, however. when i allow other processing to be done ...
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1answer
52 views

Reading DHT22 reboots arduino

I’ve got a quite weird behavior of DHT library. I’ve got DHT22 sensor. If it’s signal cable is not connected, reading the sensor causes a problem: Arduino reboots or hangs in unpredictable places. ...
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1answer
47 views

Neopixel code not working on Adafruit Feather board

I have connected a single neopixel to my Adafruit Feather board, running Arduino software. The power pin is connected to 3V on the Feather. The data-in pin is connected to pin 15 on the Feather. As ...
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1answer
192 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 ...
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23 views

Using arduino uno and an adafruit shield to control 3 dc motors and a linear stepper motor

Hello I am currently doing a project at my university which requires me to order and program 4 motors using an arduino. I will be using an arduino uno and an adafruit motor shield. 2 of the dc motors ...
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30 views

Accessing Serpente R2 SPI Flash as FAT filesystem

CircuitPython has the ability to access the Serpente R2's SPI Flash chip as a FAT file system. I can't figure out how to configure the Adafruit SPIFlash library to work for this board. The file I have ...
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58 views

Custom Board with ATSAMD21E17 with adafruit bootloader - can't flash

i build a custom board with an ATSAMD21E17D, similar to adafruit's Trinket M0, but with more used pins and different pinmux. I sucessfully burned the adafruit UF2 bootloader for that board using ...
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1answer
75 views

Adafruit Circuit Playground Express fails to upload

When uploading code to the Adafruit Circuit Playground Express, I have found that most of the time it fails to upload saying that the port is busy. There seems to be no logical reason behind this, as ...
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28 views

Bluetooth not discoverable using feather nRF52832

I just bought a feather nRF52 but I can't make the Bluetooth LE work ... I followed to tutorial (https://learn.adafruit.com/bluefruit-nr ... troduction) which features the same information that on the ...
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1answer
61 views

Issues with connecting to an Adafruit FLORA board

I just bought a new Adafruit Flora board, and I haven't been able to get it working successfully. When I plug it into a USB port, the board seems to be getting power (the green PWR LED is illuminated),...
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34 views

FlexiTimer giving errors in servo motion

I am working on a quadruped bot, spiderbot and I am trying to make a creep gait using Forward kinematics however, for some reason my code stops working after the execution of the line - [pwm.setPWM(...
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259 views

Reducing the noise of an SSD1306 display by reducing pre-charge in Adafruit SSD1306 library

I have issues with electrical noise on my board (>300mV switching noise on top of 3.3V rail, its quite a lot), which is generated by my I2C SSD1306 OLED display. After some research I found that the ...
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2answers
135 views

Adafruit motorshield v2.3 not working

I want to connect my adafruit motor shield v2.3 to a touch board from bare conductive so that the motor turns when one of the electrodes is touched. I've tested the touch part and that isn't a ...
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92 views

Thermal Printer - Qrcode

I am trying to print QRcode (not bitmap) on my thermal printer with Arduino and ESP32. I am using the same QRcode library and Adafruit Thermal printer library of this post. How to scale a bitmap (...
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1answer
33 views

Need Help to Select Microcontroller ?? Help [closed]

i am doing a project which has to run in side a garage to control water levels in sump pit as well as in overhead tank . also schedule running of pumps. i have to run 5 pumps (two for ground water ...
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1answer
64 views

How to connect 2 Fingerprint Sensor to Arduino Mega? Please help

My project was to open the door from inside and outside the room using fingerprint sensors, currently I used separate arduino on 2 different fingerprint sensor. Please help, my arduino detected only 1 ...

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