The Arduino Ethernet Shield 2 has been designed to simply and quickly connect an Arduino to the internet. The module plugs into an Arduino board and is connected to the network via an RJ45 cable (not included), then follow a few simple steps to be able to control devices via the internet. As with all Arduino projects, hardware, software and documentation is freely available and open source.

• Requires an Arduino board (not included)
• Operating voltage 5V (supplied from Arduino board)
• Uses a Wiznet W5500 ethernet controller
• Supports up to 8 different socket connections
• Onboard MicroSD card slot
• Reset controller
• Information LEDs for power, link and data status
• Connection speed 10/100Mb
• Connection with Arduino on SPI port

The Eagle files can be downloaded here.

The schematic can be downloadedhere.

The Wiznet W5500 Ethernet chip datasheet can be downloaded here.

This version, V2.1, of the DFRobot DFRduino Ethernet Shield is not only compatible with Mega 1280 and 2560, but also provides a Micro SD card slot for reading/writing. DFRduino Ethernet Shield V2.1 is fully compatible with Arduino Ethernet Shield - with the official ethernet library, you can do exactly the same thing as the original one, but at a more affordable price.

This Ethernet Shield provides an Arduino controller board with internet access. It is based on the Wiznet W5100 ethernet chip. The Wiznet W5100 provides a network (IP) stack capable of both TCP and UDP. It supports up to four simultaneous socket connections. You can use the Ethernet library to write sketches which connect to the internet using the shield. You can connect the Ethernet Shield to an Arduino board using long wire-wrap headers which extend through the shield. This keeps the pin layout intact and allows another shield to be stacked on top.

Arduino uses digital pins 10, 11, 12, and 13 (SPI) to communicate with the W5100 on the ethernet shield. These pins cannot be used for general I/O. The shield provides a standard RJ45 ethernet jack. The reset button on the shield resets both the W5100 and the Arduino board.

The shield contains a number of informational LEDs:
• PWR: indicates that the board and shield are powered
• LINK: indicates the presence of a network link and flashes when the shield transmits or receives data
• FULLD: indicates that the network connection is full duplex
• 100M: indicates the presence of a 100 Mb/s network connection (as opposed to 10 Mb/s)
• RX: flashes when the shield receives data
• TX: flashes when the shield sends data
• COLL: flashes when network collisions are detected
• Compatibility:
• Arduino Mega 1280/2560
• Arduino UNO
• Arduino Dumlinove

The Romeo family is an All-in-One Arduino-based control board especially designed for robotics applications from DFRobot. It benefits from the Arduino open source platform, it is supported by thousands of open source codes and can easily be expanded with your Arduino shields. The integrated 2-way DC motor driver and wireless socket allows you to start your own robot project immediately without the need for an additional motor driver. Romeo is also designed to have extra power for servos which need more current.

Romeo is also featured with DFRobot's standard 3 Pin-out design and is compatible with Gravity series sensors and actuators. Hundreds of sensors are now plug-play with Romeo. You may also check the Bluetooth microcontroller selection guide to get more information.

The Romeo BLE is a new member of Romeo Family. This robot controller inherits all functions of the Romeo all-in-one controller. The Romeo BLE has integrated Bluetooth 4.0, to give the robot control board the power of easy set up. Thanks to the Bluetooth 4.0, the Romeo BLE supports wireless sketch uploading which means you do not need to plug in a cable to upload new code. Just add a USB Bluno Link adapter and the Romeo BLE is ready to be updated.

With Romeo BLE, all DFRobot's mobile platforms and robots can now be used with iOS devices by APP "GoBle". Also, the Romeo BLE supports Visual Programming APP (WhenDo).

• Specifications:
• Microcontroller: ATmega328P
• Boot-loader: Arduino UNO
• On-board BLE chip: TI CC2540
• Transmission range: 70m in free space
• Supports Bluetooth remote updating of the Arduino program
• Supports Bluetooth HID
• Supports iBeacons
• Supports AT command to configure the BLE
• Supports transparent communication through serial
• Supports master-slave machine switch
• Supports USB updating of the BLE chip program
• 14 digital I/O ports
• 6 PWM outputs (Pin11, Pin10, Pin9, Pin6, Pin5, Pin3)
• 8 10-bit analog input ports
• 3 I2Cs
• Two way H-bridged motor driver with 2A maximum current
• 5 buttons
• Supports male and female pin header
• Integrated sockets for APC220 RF module
• Power supply port: USB or DC2.1
• External power supply range: 5 to 23V
• DC output: 5V / 3.3V
• Auto sensing/switching external power input
• Size: 94 x 80mm (3.70 x3.15in.)

The Beetle BLE (Formerly known as the Bluno Beetle) is an Arduino Uno-based board with Bluetooth 4.0 (BLE). It is probably the smallest Arduino BLE board in the market. It uses standard Arduino IDE to upload codes without any extra library and drivers. The Beetle BLE is another milestone in the Beetle line, which gives DIY users more options in their project designs. It is fully compatible with Bluno in instructions and procedures, and supports Bluetooth HID and ibeacon modes.

The Beetle BLE offers a super-tiny and low-cost Arduino with Bluetooth 4.0. The Beetle BLE can be used for disposable projects, such as DIY projects, workshops, gift projects, E-Textiles wearable and educational applications. For students and makers who can not afford too much on hardware purchasing, Beetle can be a great solution.

Just like a native Arduino board, but with Bluetooth 4.0. An APP called Play Bluno is available on IOS and Android which gives quick access to this little tiny board. It not only supports USB programming, but also wireless uploading. With the V-shaped gilded I/O interface, it is convenient to simply twist conductor wires on to it, which could a good choice in the wearable market.

• Features:
• ATmega328 microcontroller operating at 16MHz
• Bluetooth Low Energy (BT 4.0)
• Micro USB port
• Super compact size
• Supports Bluetooth HID and ibeacon
• Compatible with all DFRobot Bluno series
• Supports wireless programming
• Specification:
• Bluetooth chip: CC2540
• Sensitivity: -93dBm
• Working temperature: -10 to +85°C
• Maximum distance: 50m (Open field)
• Operating voltage: 5V DC
• Input voltage: <8V
• Digital pins x4
• Analog pins x4
• PWM output x2
• UART interface x1
• I2C interface x1
• Micro USB interface x1
• Power port x2
• Size: 28.8mm x 33.1mm
• Weight: 10g

The Romeo BLE mini is a simplified version of the Romeo board. It inherits all the functions of the Romeo BLE. Moreover, it's smaller.

It has 8 digital pins, 4 analogue pins and integrates Bluetooth 4.0 wireless communication function. It can easily drive a mobile platform using two 1.2A H-bridged motor drivers to meet the needs of small scale robots. The Romeo BLE mini will prove to be a very good assistant to Makers. You can also check out the Bluetooth micro-controller selection guide to get more information.

Version update: V2.0 has an upgraded motor driver IC. It replaces the HR8833 with a TB6612 motor driver chip. The TB6612 has the same control logic as the L298 motor driver and the code is compatible with the Romeo robot control board. It also has 2 interrupt pins now, so you can connect encoders to make a PID motor control.

• Features:
• Supports Gravity 3-pin interface, colour-coded, compatible with servos and Gravity sensors & modules
• Supports external power supply automatic switch, can simultaneously use USB and external power supply
• Supports wireless download program / wireless communication function
• Supports mobile phone APP control
• Two-way H-bridged Motor Driver
• Support servo external power input
• Supports AT commands to configure BLE
• Supports serial transmission
• Supports master and slave switch

• Specification:
• BLE chip: TI CC2540
• Transmission distance: 30m (open area)
• Microprocessor: ATmega328P
• Board selection: Arduino UNO
• Flash: 32 KB (ATmega328P) of which 0.5KB used by boot-loader
• SRAM2: KB (ATmega328P)
• EEPROM: 1KB (ATmega328P)
• Clock frequency: 16MHz
• Digital I/O pins: 8
• PWM digital I/O pins: 4 (D3, D9, D10, D11)
• Analog input pins: 4
• Output current: 1.2A single-channel continuous drive current
• Start / peak current: 2A (continuous pulse) / 3.2A (single pulse)
• Motor drive pins: D4, D5, D6, D7
• microUSB connector 2x 2A H-bridge motor driver
• Size: 45 x 38.5mm

This version 4.0 Bluetooth adapter has a bandwidth of approximately 3Mbps and is widely used for small file transfer (less than 10MB) for pictures, ring tones, e-books, manuscripts, etc. The device does not include any drivers or software, however, you shouldn't need any as it supports the native Windows Bluetooth stack (Windows XP, Vista, 7). Plug it in and Windows should handle the rest.

Bluetooth is a type of wireless network transmission technology originally used to replace infra-red. Compared with infra-red technology, Bluetooth can transmit data without needing a clear line of sight and the transmission distance is greater. Bluetooth technology is ideal for low power digital devices to share data with each other, e.g. mobile phones, hand-held computers. Bluetooth devices can also be used to transmit sound, e.g. Bluetooth headsets.

• Specification:
• Bluetooth standard 2.0
• USB interface: USB2.0 standard
• Operates in the 2.4 to 2.483GHz frequency band using FHSS (Frequency Hopping Spread Spectrum) technology
• Operational range in open space approx. 20m
• Intuitive software user interface, without complicated settings
• For Win7, Win8, Win10, WinXP, Mac OS X operating system
• Sensitivity <-85dBM
• Data transfer rate up to 3Mbps
• Features:
• PC / Mac: Bluetooth dial-up internet access (subject to mobile phones and other devices with Bluetooth)
• PC: Bluetooth wireless local area network
• PC: Bluetooth wireless fax (computer must be equipped with fax software)
• PC / Mac: Bluetooth File Transfer
• PC / Mac: Bluetooth wireless data synchronization
• PC: Bluetooth Virtual Serial Port
• PC: Bluetooth wireless printing
• PC / Mac: Bluetooth Human Interface e.g. Bluetooth mouse and Bluetooth keyboard
• Bluetooth serial port with the computer, microcontroller, Basic Stamp 2, DF-Bluetooth Bluetooth module, Roboduino or Arduino controller connection, to achieve Bluetooth wireless remote control

The DF-BluetoothV3 Bluetooth module uses a unique double-board design to help prevent electrostatic damage to the module. It is designed to have two DC power inputs: a wide voltage supply (3.5 to 8V) and a 3.3V power supply, making it suitable for a wide variety of applications.

STATE LINK is indicated by a bright LED which is used to display module status and connection status (STATE state: Search state (high 104ms 342ms 2.9Hz cycle flicker) connection status (high 104ms period 2s 0.5Hz flashing), LINK state: paired.) It has a built-in on-board antenna which provides high quality signals.

A DIP switch is used to set the module status, LED Off to turn off the LINK light to enter power-saving mode, AT Mode allows the module to enter AT command mode. AT commands can modify the baud rate and the master and slave mode.

The module has been tested for compatibility with most Bluetooth adapters on the market (Bluetooth dongle, including laptops and mobile phones). The module has been tested with, and is compatible with Android Phones. Two modules can be used as a 'pair' to produce a transparent serial data communication link.

• Bluetooth chip: CSR BC417143
• Bluetooth protocol: Bluetooth Specification v2.0 + EDR
• USB Protocol: USB v1.1/2.0
• Operating frequency: 2.4 to 2.48GHz unlicensed ISM band
• Modulation: GFSK (Gaussian Frequency Shift Keying)
• Transmit Power: ≤ 4dBm, Class 2
• Transmission distance: 20 to 30m in free space
• Sensitivity: ≤-84dBm at 0.1% BER
• Transfer rate: Asynchronous: 2.1Mbps (max.) / 160kbps; synchronous: 1Mbps/1Mbps
• Safety features: authentication and encryption
• Support profiles: Bluetooth serial port
• Serial port baud rate: 4800 to 1382400 / N / 8 / 1 default: 9600
• LED indicator: STATE state: Search state (high 104ms 342ms 2.9Hz cycle flicker) connection status (high 104ms cycle 2s 0.5Hz flashing), LINK Status: Always after match
• Input voltage: 3.5 V to 8V DC and 3.3V DC/50mA
• Working temperature: -20°C to +55°C
• Module size: 40 x 20 x 13mm
• DFRobot type TEL0026

This Bluetooth 4.0 audio receiver module also includes a USB port and a TF card slot. With its pre-amp level output, it can drive headphones or a 3W speaker directly. You can also add an active power amplifier and connect a loudspeaker for more volume.

The module supports MP3, WMA, WAV and lossless FLAC audio formats. It supports playback from either a TF card or USB flash drive or via Bluetooth. All playback is controlled by push-buttons and the built-in sound equalizer can be adjusted to your favourite settings.

With its compact size and simple 5V DC power requirement, this is an ideal module to add a Bluetooth feature to your car or turn an old hi-fi loudspeaker into a wireless Bluetooth speaker.

NOTE: The MIC Port is reserved, so it can be used for recording or calling when bluetooth is connected. The IR remote control function enables easy control of the board remotely, using the remote control unit.

• Power supply: 5V DC (MicroUSB connector)
• Audio decoding: MP3, WMA, WAV, FLAC
• Audio input: Bluetooth, USB, TF card
• Dimensions: 40 x 53mm
• Weight: 12g
• DFRobot type TEL0108

NOTE: A 3V CR2025 cell battery is not supplied with this product.