Adafruit
Tiny Code Reader from Useful Sensors
All Products
New Arrivals
NFC & RFID Sensors
Sensors
Arduino
Raspberry Pi
Brands and Manufacturers
IoT Development Boards
IoT Devices & Platforms
NFC & RFID
Sensors & Modules
Sensors & Input
Connectivity
Prototyping & Wiring
Little Bird Electronics
$15.68
|
In stock at supplier
The Tiny Code Reader from Useful Sensors is a small, low-cost hardware module that reads QR codes. It's designed to be a simple way to provision a system, fo...
Estimated Delivery
Arrives
Disclaimer
Secure checkout
The Tiny Code Reader from Useful Sensors is a small, low-cost hardware module that reads QR codes. It's designed to be a simple way to provision a system, for example, by providing the Wi-Fi network name and password or providing input when there's no keyboard.
Internally, the Tiny Code Reader bundles an image sensor and a small microcontroller into a single board, but to make it as easy as possible to build into products, the folks at Useful Sensors wanted to hide those implementation details. It returns information about any QR codes it sees over an I2C connection.
The board uses a standard STEMMA QT / Qwiic connector for the I2C interface. If you're using a standard connector, the wire colors are yellow for SCL, blue for SDA, red for 3.3V, and black for GND. The sensor supports I2C bus speeds of up to 400k baud with 3.3V power; other voltage levels (like, 5V) are not supported.
The sensor uses an image sensor internally, so you need to make sure that the lens has a clear field of view. It can be mounted in any orientation, which shouldn't affect the code recognition quality. There's a mounting hole for a screw in the top left, and some alternative pads in case you don't want to use a QT connector but want to wire in directly. The edge with these pads is designed to snap off, in case you need to reduce the size of the board further.
Jargon buster
Plain-language definitions for the technical terms used above.
- baud
- Baud is the signalling rate of a serial connection, often used as the speed setting for UART communication. Matching the baud rate matters because both connected devices must use the same setting for readable data.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
- STEMMA QT
- A small plug-in connector system for I2C boards that lets you connect compatible sensors and controllers without soldering. It matters because it can make wiring faster and less error-prone, especially when adding several small modules to a project.
Find this product in
Connectivity
Sensors & Input
Related Tutorials
Free guides on learn.littlebird.com.au
