Beetle is fully compatible with the Arduino Leonardo board. It derives its core notion from minimalism without compromising functionality.

It comes with Atmel ATmega32U4 (datasheet) @16MHz clock time and has expanded amounts of interfaces: 10 digital pins, 5 analog pins, and 4 pwn pins. To further make it user-friendly, it is compatible with Micro USB so that direct programming and testing is no longer a headache. Select “Arduino Leonardo (tools – board – Arduino Leonardo in Arduino IDE), the ATmega32U4 comes pre burned with a bootloader that allows you to upload any new code that is applicable to Arduino Leonardo.

As the DFRobot smallest board compatible with Arduino Leonardo, it enjoys similar powerful functionalities. Beetle aims to solve problems of the low-cost controller, ease-of-using properly, and to provide a low-cost solution for disposable projects, such as DIY projects, workshops, gift projects, E-Textiles, and education. For students and makers who can not afford too much on hardware purchasing, Beetle can be a great solution.

Features:

Useful Links:

BLE-Nano-Board has a main chip ATMEGA328P-MU QFN32, the latest bootloader (Arduino IDE 1.8.8) was burned down. It is fully compatible with the common nano board. BLE-Nano-Board is PIN-PIN with Arduino Nano V3.0, and share the same
Super small volume design, more convenient to use this PCB size is only 48mm*19mm, the pin is fully compatible with Nano V3.0, No Soldering is needed. The micro USB port is more convenient to use
High-quality material and Technology is being used the Bluetooth is used TI CC2540 BLE (SOC) chip. Maximum support 1Mbps air data transfer rate, stable performance. Communication distance can reach 50M in an open environment.
More convenient for application of BLE-Nano-Board integrates a CC2540 BLE module with Arduino nano v3.0 board, which is very convenient for Bluetooth wireless connect applications.

Pinout Diagram:

Features:

1. Fully compatible for Arduino Nano-V3.0 pins and usage
2. Transmission distance: open distance 50m
3. Support Bluetooth host mode to automatically connect slaves
4. Support AT command to configure BLE
5. Support USB virtual serial port, hardware serial port, BLE three-way transparent transmission
6. Support master-slave switching

Package Includes:

1 x BLE Nano Integrated CC2540

This Arduino-compatible Nano V3.0 micro-controller is a small, complete, micro-controller board based on the ATmega328 MCU. It has more or less the same functionality as the Arduino Duemilanove, but in a smaller package. It lacks only a DC power jack, and uses the more compact Mini USB (Mini-B) connector instead of a standard USB connector.

It is compatible with Arduino programs and the Arduino IDE. This version of the Nano uses the CH340G USB interface controller.

It can be powered via the Mini-B USB connection, a 6-20V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). The power source is automatically selected to the highest voltage source.

Features: 

1. CH340G USB bus converter chip replaces FT232RL
2. Operating Voltage（logic level): 5V
3. 8 analog inputs ports: A0 – A7
4. 14 Digital input / output ports: TX, RX, D2 – D13
5. 6 PWM ports: D3, D5, D6, D9, D10, D11
6. 1 pair of TTL level serial transceiver ports: RX / TX
7. Uses Atmel Atmega328P-AU MCU with bootloader installed
8. Support USB download and Power over Mini-B Mini USB connector
9. Recommended input voltage: 7V – 12V DC on pin 30 or 5V on pin 27
10. Maximum input voltage limits: 6V – 20V
11. Supports ISP download
12. Supplied with connector pins (headers), not soldered to the board for user flexibility

Package Includes:

1. 1 X Nano V3.0 16MHz CH340
2. 1 X Type-C Cable 30cm

This Arduino-compatible Nano V3.0 micro-controller is a small, complete, micro-controller board based on the ATmega328 MCU. It has more or less the same functionality as the Arduino Duemilanove, but in a smaller package. It lacks only a DC power jack, and uses the more compact Mini USB (Mini-B) connector instead of a standard USB connector. It is compatible with Arduino programs and the Arduino IDE. This version of the Nano uses the CH340G USB interface controller. It can be powered via the Mini-B USB connection, a 6-20V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). The power source is automatically selected to the highest voltage source.

Features: 

1. Supports ISP downloa
2. Easy to handle
3. Best for your electronic projects
4. Tiny size makes it perfect for compact projects.
5. Functionally the same as their larger counterparts.
6. Fits onto a breadboard making prototyping easier.

Specifications:

1. Product: Arduino NANO
2. Model: Nano V3.0 CH340
3. Processor: ATmega328
4. Operating Voltage: 5V
5. Crystal oscillator: 16MHz.
6. Memory: 32 KB of Which 2 KB Used By Boot loader
7. Max Supply Voltage: 6V – 20V
8. USB Connector: 2.0 Ports Mini USB
9. Digital I/O Pins: 22
10. Cable Type: TYPE C
11. 8 analog inputs ports: A0 – A7

Package Includes:

1 x  Nano V3.0 16MHz CH340

Block Diagram:

Features: 

1. I2C bus master controller with UART interface
2. 12-bit ADC converter, compatible with I2C interface
3. Destiny: Azure Sphere MT3620
4. Connectors: Grove
5. 6 Grove connectors:
   1. 1x UART
   2. 2x I2C
   3. 1x Analogue
   4. 4x GPIO

Package Includes:

1 x MT3620 Grove Shield v1.0