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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31 views

jm-101b Fingerprint sensor not working with Arduino Uno

On the sticker of the fingerprint module, it says "JM-101B 2050B". The product page that I bought it from has it listed as: "Teyleten Robot DC 3.3V AS608 Optical Fingerprint Reader ...
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16 views

How to use an Arduino to play audio from an Adafruit Soundboard using audio file name

I'm trying to control an adafruit soundboard with my elegoo uno R3. I'm a beginner programer and I'm trying to get the soundboard to play a sound file by name when I press a button. I have confirmed ...
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15 views

Arduino UNO and PCA9685 - Problem with external power supply

I am totally desperate and hope you can help me. I've been building a project for a while where I have to control several servos. For this I bought some MG996R servos and a PCA9685 16-Channel Servo ...
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31 views

How can I get a Faster boot with the Adafruit Feather SAMD21?

The Adafruit Feather SAMD21 takes about two seconds from power being supplied to when setup() starts running. How can I shorten that time so that setup() will run sooner? I measure this time using a ...
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29 views

Using Trinket M0 as a raw hid device

I am using Nico Hood's rawhid code to have a micro controller presents itself as a raw hid device to the PC. This works splendidly when I use it on an Arduino Pro Micro. My linux kernel will report: ...
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28 views

Adafruit PN532 shield: having trouble stopping the read function

I working on a wheel of fortune game and thought of using RFID cards in the segments of the wheel to identify and play certain videos when the wheel has stopped. If the wheel stops in segment A it ...
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41 views

FastLED and Adafruit Gemma M0 - Getting started

I just bought a Gemma M0 and I'm trying to use it with FastLED. There are several forums that discuss the same errors I get when I try to upload my code, but they all involve editing .h files, ...
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45 views

RTClib.h problem

In Library Manager RTClib and DS3231 work somehow with older versions. RTC time can picked only once and then it give bullshit. Using newest versions screen is empty. In picture first time is right, ...
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1answer
466 views

Data not writing to SD Card on a Feather M0

I'm trying to write a sketch that will pull data from a BME280 and ADXL345 using the I2C protocol and then write that data to an SD card. Using different sketches I've found online I got something ...
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1answer
56 views

Capacitive touch on Adafruit Trinket M0 goes unstable when USB cable from laptop is disconnected

Note that to get to this point, I used much of the helpful information from the Post How to use capactive touch on Adafruit board in Arduino mode? I am using a Trinket M0 with the Arduino IDE with the ...
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1answer
38 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 ...
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1answer
352 views

Adafruit_Arcada' does not name a type;

I am trying to program an adafruit pygamer (which says it's compatible with Arduino). I have added the ZIP folder for the library into the library folder om my PC where all of my folders are supposed ...
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2answers
180 views

Is an atmega 2560 board compatible with the Adafruit Trellis?

I want to build a custom midi controller for my computer, and yes, Adafruit has a mini Untz project. For my purposes, I need more analog inputs than the Leonardo, and the only other option I can find ...
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27 views

How to correctly use SSL certs with the Adafruit SIM800H

I am trying to use a Adafruit Sim800H to connect to Azure using MQTT with an SSL certificate. My first step is trying to put a new SSL certificate onto the board. To do this I am using this example ...
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1answer
151 views

Rfid with Adafruit fingerprint together not working in Arduino Uno

I have edited my Code and now the issue is both are working but not together #include <Key.h> #include <Keypad.h> #include <Adafruit_Fingerprint.h> #include <SD.h> #include &...
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3answers
189 views

How do i make my DC motors run simultaneously?

Im coding an adafruit motor shield for 3 DC motors to go forward & backwards, and so my concern is why only my motor3 is running the whole time and motors 1 & 2 are switching off meaning 1 ...
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47 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 ...
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1answer
217 views

Blynk app, DotStar bluetooth control code help

This is my setup: Arduino Mega; HM-10 bluetooth module (bought off ebay, so not sure if genuine but works); Adafruit Dotstar addressable LED strip; iOS Blynk app; Hardware-wise, everything is ...
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145 views

Configure Trinket M0 as I2C peripheral

I am trying to use I2C to communicate between my XBee3 (controller) and an adafruit trinket m0 (peripheral). I'm pretty confident I have the modules connected properly (trinket SCL/pin 2 to xbee SCL/...
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4k views

A SoftwareSerial library for SAMD boards

So I've got three boards that I'm using to test this (modified) code: int sensor1Pin = A0; int sensor2Pin = A1; int sensor3Pin = A2; float sensors[] = {0,0,0}; void setup(){ Serial.begin(9600); } ...
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13 views

Issue displaying on Adafruit display when enabling GSM communication

I am trying to write to the adafruit display using Arduino MKR1500 when it is connected to the internet. The issue I am facing is when I add the code to connect to the cloud, the display stops working....
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1answer
296 views

Adafruit Huzzah ESP8266 Battery Power issue

I'm trying to connect a ~5.5V (2 x 3V coin cells in series, but their voltage drops a little) to the VBat (or V+) of my Adafruit Huzzah ESP8266 module (not the black Feather one, the smaller blue one: ...
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1answer
9k views

Did not find fingerprint sensor :( Arduino Mega 2560 Adafruit Fingerprint Sensor

I'm getting the following error when I try to enroll fingerprints using the Arduino Mega 2560 microcontroller along with a Fingerprint Scanner: Did not find fingerprint sensor :( The exact devices ...
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2answers
519 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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1answer
456 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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1answer
206 views

How to fade LED in a defined time using FastLED

I'm using FastLED library, Arduino Nano and 5 addressable LEDs (WS2812B). I'd like to create the sequence in the image attached. (all in white color for example) I know how to turn ON each LED every 0....
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0answers
28 views

Driver configuration not showing the right numbers on the Graphics Test example's serial monitor for Adafruit IlI9341 library

I have a 2.8" Color TFT Touchscreen from Adafruit, and I'm currently trying to set it up. I've been following this guide to set up the screen. The screen powers on when connected to power, but it'...
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1answer
223 views

Arduino Micro project with Bluetooth low energy

I created my project prototype with Arduino Micro and Adafruit Bluetooth low energy device. Now I need to develop the prototype to production (like a small USB device). I just need Rx, Tx, 3V pin ...
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1answer
236 views

Why am I getting a "SendCommand was not declared" Error

#include <Adafruit_Fingerprint.h> #include <SoftwareSerial.h> #include <LiquidCrystal.h> uint8_t id; int getFingerprintIDez(); //pin #16 is IN from sensor (GREEN wire) //pin #15 is ...
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1answer
119 views

Adafruit Thermal Printer unwanted gradient

I have thermal printer from adafruit and when printing images I have problems getting a proper black. I tried playing with the dot print time and the dot feed time using the setTimes function, but ...
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2answers
2k views

Adafruit RTC begin() not returning false

I am programming my arduino with the capability to keep time with the DS3231 from Adafruit. I do not have the module yet, but am trying to figure out the rest of the build without it. However, it ...
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2answers
354 views

Cannot successfully implement singleton

I have spent the better part of today trying to figure out why I can't get this to work... I have this project where, because of previous design considerations, have implemented a singleton class that ...
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48 views

How to use 5v and 12v addressable led strip together

Hi guys I’m new to this forum and also not much experience about led lights question already asked but didn’t get any detailed answer I want to know can I provide working data signal to 2 different 5v ...
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0answers
37 views

SD Card Library interferes with Adafruit

Im currently working on a datalogger that uses oled i2c displays and current sensors. Both of them uses adafruit libraries. To write the data, im using arduino's sd library, but somehow, the sd ...
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159 views

Calibrating Adafruit TCS34725 for RGB colors

I am new to Arduino. I am currently working on a project which requires color detection using the TCS34725 Adafruit sensor module. For the project, I need to calibrate the sensor with RGB colors. ...
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1answer
103 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 ...
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0answers
48 views

Adafruit soundboard with esp32

Board: ESP32 Development Board I am trying to get the adafruit soundboard code to work on my ESP32. I have installed espSoftwareSerial but I keep getting errors with their sample code. I receive ...
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2answers
1k views

Get accelerometer values from BNO055 using adafruit's Unified Sensor Library

If I understand correctly using the Adafruit_Sensor one can extract information from the sensor specific information. These sensors are currently mentioned in the README. I am using the BNO055 for two ...
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2answers
2k views

ESP32 Pins won't fit in solderless breadboard

I bought an Adafrut Huzzah32 ESP32 for an IoT project. When the ESP32 arrived, I attempted to fit it into my existing breadboard, but I immediately noticed that no matter how hard I pushed, the pins ...
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1answer
2k 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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3answers
2k views

How can I reduce the size of my sketch?

Looks like I'm overshooting the storage of my Adafruit Trinket: Sketch uses 5,600 bytes (105%) of program storage space. Maximum is 5,310 bytes. Global variables use 109 bytes of dynamic memory. Any ...
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25 views

Servo make partial rotation and stop working automatically

I'm using this board in my robotic arm project: Adafruit PCA9685 16-Channel Servo Driver ( https://learn.adafruit.com/16-channel-pwm-servo-driver/using-the-adafruit-library) I've connected all of my ...
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0answers
39 views

DHT-sensor-library-master

I only uploaded the library to check whether it has installed correctly. It's installed and i am having this error. Using library DHT-sensor-library-master at version 1.4.1 in folder: C:\Users\Mcniven\...
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30 views

Adafruit CCS811 Air Quality Sensor

in my arduino project I use the Adafruit CCS811 Air Quality Sensor Breakout - VOC and eCO2, I need the references and sizes of these components, knowing that I have found the electrical diagram but ...
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129 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 ...
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1answer
182 views

How do I set up communication between the "Seeeduino Xiao" and the "Adafruit Bluefruit LE UART Friend - Bluetooth Low Energy (BLE)"?

I've seen normal Arduino boards connecting to it no problem (Uno, Nano, etc.). I'm trying to connect it to my Seeeduino Xiao. It has UART compatible pins, so I'm fairly certain wiring isn't an issue. ...
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1answer
83 views

Error Compiling for board Arduino Nano while using Adafruit GFX

Whys is this happening to me?? I have to meet a deadline please help!! Here is my code. #include <SPI.h> #include <Wire.h> #include <Adafruit_GFX.h> #include <Adafruit_SSD1306.h&...
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116 views

Use I2C to control one of three DS3502 Adafruit digital potentiometers on the same I2C bus

My teammate and I recently purchased a handful of DS3502 digital potentiometers (https://learn.adafruit.com/ds3502-i2c-potentiometer/pinouts) from Adafruit, and we'd like to be able to control them ...
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0answers
78 views

How do I make my motors speed change?

I'm using an Adafruit V1 Motor Shield for coding two 12 volt DC motors. In my code I'm changing the set speed, but the motors still seem to be going the same speed, which is really fast, and I want ...
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107 views

'class Adafruit_SPIDevice' has no member named 'endTransaction'

So what I have done is followed all of the instructions in the following link: https://learn.adafruit.com/adafruit-pygamer/setup and have managed to get all the way up to https://learn.adafruit.com/...

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