Elecrow
Crowduino-UNO-ESP8266-V1.1
The Crowduino UNO ESP8266 combines an Arduino UNO-compatible microcontroller with an onboard ESP8266 WiFi module in a single, compact board. Instead of wirin...
The Crowduino UNO ESP8266 combines an Arduino UNO-compatible microcontroller with an onboard ESP8266 WiFi module in a single, compact board. Instead of wiring a separate WiFi shield or module, you get integrated wireless connectivity right out of the box.
Built around the ATmega328 running at 16 MHz, this board maintains full compatibility with Arduino UNO shields and sketches while adding 802.11 b/g/n WiFi via the ESP8266. The two processors communicate over a high-speed UART at 115200 bps, making it straightforward to add wireless data transmission, remote control, and IoT connectivity to your projects.
Key Features
- ATmega328 Microcontroller – 16 MHz clock, 32 KB flash (0.5 KB bootloader), 2 KB SRAM, 1 KB EEPROM
- Integrated ESP8266 WiFi – 802.11 b/g/n with WiFi Direct (P2P), soft-AP support, and integrated TCP/IP stack
- 14 Digital I/O Pins – 6 with PWM output, 40 mA per pin
- 8 Analogue Input Pins – For sensor and signal reading
- UNO R3 Form Factor – Compatible with standard Arduino shields
- High-Speed Serial Link – 115200 bps default baud rate between ATmega328 and ESP8266
- +19.5 dBm Output Power – Strong WiFi signal in 802.11b mode
Specifications
- Operating Voltage: 5 V
- Input Voltage: 7–12 V (6–15 V limit)
- 3.3 V Pin Current: 50 mA
- Dimensions: 70.0 × 55.0 × 11.8 mm
Ideal For
- IoT and smart home projects
- Remote monitoring and data logging
- WiFi-enabled robotics
- Wireless sensor networks
Package Contents
- 1× Crowduino UNO ESP8266 V1.1 board
Resources
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.
- Bootloader
- Small starter software on a microcontroller that lets new code be uploaded before the main program runs. Knowing how to enter bootloader mode matters when you need to program the board or recover it after a faulty sketch.
- EEPROM
- A type of non-volatile memory that keeps stored data even when power is turned off. In a sensor module, it can be used to store settings or calibration data so they do not need to be re-entered every time.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
- 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.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
- Shield
- An add-on board that plugs into a main controller board to give it extra features such as sensing, motor control or communication. Knowing a product supports shields helps you judge whether it can connect neatly into an existing maker-board setup.
- SRAM
- Fast temporary memory used by a processor while a program is running. More SRAM helps with projects that handle larger data buffers, networking, displays, or more complex code.
- UART
- UART is a simple serial connection that sends data over separate transmit and receive wires, often labelled TX and RX. It matters because this module is designed to replace a wired UART cable with a wireless link while keeping the same serial data format.
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