We’ve also developed Apps (Play Bluno) on both Android and IOS platform for you to start playing between phone and arduino immediately. At the same time, we provide developers more freedom and support: users can not only debug Bluno – An Arduino Bluetooth 4.0 (BLE) Board through AT command, but also update BLE chip firmare via USB. 

Product Name	Bluno Bee – Turn Arduino to a Bluetooth 4.0 (BLE) Ready Board	Bluetooth 2.0 Module V3 For Arduino	Bluetooth 2.0 Bee Module For Arduino	Bluno Link – A USB Bluetooth 4.0 (BLE) Dongle	Bluetooth Adapter Mini
SKU	TEL0073	TEL0026	TEL0023	TEL0087	TEL0002
BLE Chip	TI CC2540	CSR BC417143	CSR BC417143	TI CC2540	—
Frequency	2.4GHz	2.4 ~ 2.48GHz unlicensed ISM band	2.4 ~ 2.48GHz unlicensed ISM band	2.4GHz	2.4 ~ 2.48GHz FHSS
Transfer rate	1Mbps GFSK	Asynchronous: 2.1Mbps (Max) / 160 kbps; Synchronous: 1Mbps/1Mbps	Asynchronous: 2.1Mbps (Max) / 160 kbps; Synchronous: 1Mbps/1Mbps	1Mbps GFSK	3Mbps
BLE protocol	V4.0	V2.0 + EDR	V2.0 + EDR	V4.0	V2.0
Modulation	GFSK	GFSK	GFSK	GFSK	FHSS
Power consumption	10.6mA average, ready mode: 8.7mA	—	—	10.6mA average, ready mode: 8.7mA	—
Sensitivity	-93dBm	≤-84dBm	≤-84dBm	-93dBm	≤-84dBm
Working Voltage	3.3V	+3.5 V ~ +8 V DC and 3.3V DC/50mA	3.3V	3.3V	—
Operating temperature	-40 ℃ ~ +85 ℃	-20 ℃ ~ +55 ℃	-20 ℃ ~ +55 ℃	-10 ℃ ~ +85 ℃	-20℃ ~ +55℃
Transmission distance	30m	20 ~ 30m	20 ~ 30m	10 ~ 20m	<10m
Dimension	32*22mm	40*20*13mm	32*24*9mm	32mm * 16mm	20*16*8mm
Weight (g)	10	10	12	10	10
AT command to debug the BLE	√	√	√	√	—
master-salve machine switch	√	√	√	√	—
Transparent transmission	√	√	√	√	—
Wireless programming	√ (Available for Bluno series)	—	—	√	—
iBeacons	√	—	—	—	—
BLE HID	√	√	√	√	√
Mobile App Control	√	√	√	—	—
Key Features	support Android and IOS applications,open source code,suitable for secondary development by the user	Compatible with APC220 communication interface, can be directly used in I/O Expansion Shield, Romeo, XBoard and etc,.	It can be plugged into the Arduino controller using the XBEE base for Bluetooth wireless control.	Standard USB interface. Support for firmware update via USB. Install Arduino UNO USB driver, default host mode.	USB2.0 standard interface. supports the native Windows Bluetooth stack.

• AT command to debug the BLE
• support the master-salve machine switch
• Transparent transmission
• Wireless programming for Arduino processor (Compatible with Arduino UNO,Fio and Mega)
• support usb update BLE chip program
• support bluetooth HID
• convenient to upgrade firmware of BLE
• support Android and IOS applications,open source code,suitable for secondary development by the user

• Chip:TI CC2540>
• Working Voltage: +3.3 -5v DC
• Power consumption: working: 10.6mA average, ready mode: 8.7mA
• Pin Layout: Compatible with Xbee pinout
• Frequency: 2.4GHz
• Transfer rate:  ≤1Mbps
• Modulation: GFSK, bluetooth low power, V4.0
• Sensitivity: -93dB
• Operating temperature： -40 ℃ ~ +85 ℃ 
• Transmission distance: 60m in free space
• Size:32mm * 22mm (1.26 * 0.87″)

• Product Wiki
• Schematic V1.1

• Xbee shield for Arduino
• IO Expansion shield for Arduino V7
• Mega IO Expansion Shield V2.3 For Arduino Mega
• IO Expansion Shield for Launchpad
• DFRobot Leonardo with Xbee socket
• Any devices with xbee socket

Demo Tutorial

• Bluno Basic Demo

• Bluno Bee  x1

News: Undergraduate students at the Utah State University (USU) have successfully launched the first Pi-powered satellite into orbit. The GASPACS CubeSat, which was sponsored by NASA,
features a Raspberry Pi Zero computer, a second-gen Pi Camera Module, and a DFRobot Beetle microcontroller to facilitate basic tasks at a low price. Read more.

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 educational. For students and makers who can not afford too much on hardware purchasing, Beetle can be a great solution for them.

• 20mm X 22mm compact size
• Direct downloading and testing via Micro USB
• V-shaped large-size gold-plated IO ports make it convenient for the user to twist wires upon, and can also be directly sewn on clothes with conductive thread.
• Two honeycomb shape gold-plated power interface
• Magic light blue soft BLINK indicator

• Microcontroller: ATmega32u4
• Clock Speed: 16 MHz
• Operating Voltage: 5V DC
• Digital I/O Pins: 10 
• PWM Channels: 4 
• Analog Input Channels: 5 
• UART: 1 
• I2C: 1 
• Micro USB: 1 
• Power Ports: 2 
• Flash Memory:  32 KB of which 4KB used by bootloader
• SRAM:  2.5 KB
• EEPROM:  1 KB
• Size: 20mm*22mm*3.8mm

• Wiki
• Schematic
• Review by One Mans Anthology
• Adafruit’s Trinket vs DFRobot’s Beetle – Review and Comparision (Video)
• Beetle: Minimize Your Arduino Projects (Instructables)

• Beetle x1

Bluno combines the user-friendly nature of Arduino with the wireless prowess of Bluetooth 4.0, offering an efficacious and pliable solution for IoT projects. Featuring an ATmega328 microcontroller and an integrated BLE chip, Bluno empowers developers to effortlessly exchange data with Bluetooth devices, without the need for delving into intricate Bluetooth protocols. The board boasts a plethora of I/O interfaces, support for a wide range of sensors and actuators. Compatible with the Arduino IDE, Bluno serves as an exemplary choice for prototyping and testing applications encompassing home automation, environmental monitoring, and automated control.

Compatible with Arduino Programming

Bluno is programmed using the Arduino IDE, rendering it user-friendly for individuals already acquainted with Arduino. This feature allows for instant utilization without the need to acquire new programming tools or adapt to unfamiliar environments. Additionally, its compatibility with Arduino ensures access to a vast array of resources, such as a multitude of Arduino libraries and example code. These resources greatly expedite the development process and alleviate difficulties. Furthermore, Bluno benefits from a solid backing of community support. The Arduino community thrives as an active and open-source network comprising countless developers and enthusiasts. This vibrant community makes it effortless to seek assistance, exchange knowledge, and share experiences.

Supports Arduino Shields and Various Sensors

Bluno follows the standard Arduino pin layout, encompassing interfaces for digital I/O, analog input, PWM, I2C, SPI, and UART. Consequently, Bluno can seamlessly accommodate a wide range of Arduino-compatible shields. This advantageous feature enables the utilization of existing Arduino shields and sensors without necessitating additional hardware purchases for compatibility with Bluno. As a result, development and prototyping costs are effectively reduced.

Multiple Wireless Capabilities

Bluno supports Bluetooth data transmission, enabling wireless communication between a smartphone or another Bluno device. This is achieved through straightforward “Serial.write” and “Serial.read” commands for sending and receiving Bluetooth data. Moreover, Bluno provides the added convenience of wireless programming. Once two devices are connected, you can effortlessly upload code from one Bluno to another one. This streamlined process simplifies updates and enhances overall flexibility.

DFRobot Bluno series is an Arduino-compatible Bluetooth 4.0 (BLE) hardware solution designed by makers, and for makers. All Bluno products are Bluetooth 4.0 ready, and enjoy features such as wireless programming, smart App controlling, long communication range, and plentiful periphery modules.

Introduction to Bluno Series

• On-board BLE chip: TI CC2540
• Wireless Programming via BLE
• Support Bluetooth HID
• Support AT command to config the BLE
• Transparent communication through Serial
• Upgrade BLE firmware easily
• DC Supply: USB Powered or External 7V~12V DC
• Microcontroller: Atmega328
• Bootloader: Arduino Uno ( disconnect any BLE device before uploading a new sketch )
• Compatible with the Arduino Uno pin mapping
• Size: 60mm * 53mm(2.36″*2.08″)
• Weight: 30g

Introduction: KnowFlow is the name of this water quality monitoring device, based on “Arduino Uno”. It can automatically monitor 5 parameters of water: pH, Temperature, Dissolved Oxygen, Electronic Conductivity, ORP.

Project 2. How to Make an Automatic Christmas Tree

Introduction: With all the lights and decorations that people use at Christmas, power is left on all the time and electricity bills skyrocket. I made this motion detecting Christmas tree light setup that only turns on when people are nearby.

Project 3. How to Make a Santa Alarm

Introduction: Using the new RGB color sensor available at DFRobot, I rigged up a simple proximity alarm. I can use this to warn myself if someone is in a close range of my Christmas tree putting presents under there. The hardware of this project is pretty simple and suitable for beginners.

Project 4. How To Build Your Own MechaGodzilla Armor! 56 Days To Make Wearable Monster Suit Using EVA & Gears!

• DFRobot Microcontroller compatible with Arduino Selection Guide 
• Wiki
• Introduction to Bluno Family
• Schematic

Demo Tutorials

• Bluno Basic Demo
• Bluno Accessory Shield Demo
• Programming the Internet lesson 37: Exploring the DFRobot Bluno

User Review

• Embedded Computing Review by Rei Vilo

Custom Application from User

• Bluno iOS Terminal (developed by Air Vision)
• 3D Printable Bumper for Bluno (by omega368)

• Bluno x1

Version Upgrade:
1.V2 replaces DRV8825 as stepper motor driver, higher micro stepping (1/32)
2.Increase 3.3/5V input signal switch, compatible with 3.3V microcontroller
3.Expand the driver Enable pins, support sleep mode

Motor Drive Expansion Board Selection Guide

Product Name	2x1A DC Motor Shield for Arduino	Micro:bit Driver Expansion Board	Gravity: Dual Bipolar Stepper Motor Shield for Arduino (DRV8825)	Quad DC Motor Driver Shield for Arduino
SKU	DRI0001	DFR0548	DRI0023	DRI0039
Chip	L293B	HR8833	DRV8825	TB6612FNG
Operating voltage	5V DC	/	3.3V/5V	2.7~5.5V
Motor drive voltage	7-12V DC	3.5~5.5V DC	8.2-45VDC	2.5V-13.5V
Maximum drive current	1A each way	1.5A	1.6A	1.2A continuous current (per channel) 2A (continuous pulse) 3.2A (single pulse)
Motor drive using pins	PIN4/5/6/7 (Arduino Controllor)	/	D4，D5，D6 D7，D8，D12	D3,4,5,6,7,8,11,12
Dimension	56x57mm	63 x 58mm	83*55*25mm	52mm * 53mm
Weight (g)	60	64	48	24
Frequently used With	FIT0565/FIT0520/ FIT0450/FIT0492/ N20 Series	FIT0565/FIT0520/ FIT0450/FIT0492/ N20 Series	FIT0278/FIT0503	FIT0565/FIT0520/ FIT0450/FIT0492/ N20 Series
Key Features	With motor indicator	8-way servo interface DC motor x4/stepper motor x2(multiplexed with motor interface)	Full step, 1/2, 1/4, 1/8, 1/16, 1/32 step mode	High-speed drive capability, can drive ordinary 2-phase stepper motor to 5000RPM, and drive quad DC at the same time
Product Name	Gravity: IO Expansion & Motor Driver Shield	Gravity: 2x2A Motor Shield for Arduino Twin	TMC260 Stepper Motor Driver Shield	2x2A DC Motor Shield for Arduino
SKU	DFR0502	DRI0017	DRI0035	DRI0009
Chip	TB6612FNG	L298	TMC260	L298P
Operating voltage	2.7~5.5V	5V	5V	5V
Motor drive voltage	12V (peak value)	4.8 ～ 35V	40V max	6.5~12v(VIN Power Supply),4.8~35V (External Power Source)
Maximum drive current	1.2A continuous current (per channel) 2A (continuous pulse) 3.2A (single pulse)	up to 2A/channel	up to 2A per motor coil	2A
Motor drive using pins	D4 D5 D6 D7	D10,11,12,13	/	Pin 4,5,6,7 are used to drive two DC motor
Dimension	68.5mm×53.3mm	56x57mm		55x55mm
Weight (g)	36	35	35	60
Frequently used With	FIT0565/FIT0520/ FIT0450/FIT0492/ N20 Series	FIT0565/FIT0520/ FIT0450/FIT0492/ N20 Series	FIT0278/FIT0503	FIT0565/FIT0520/ FIT0450/FIT0492/ N20 Series
Key Features	Integrated XBee Slot, XBee, WiFi Bee, Bluetooth Bee,  I2C.	Mirrored version of DRI0009. Drive pins: 10, 11, 12, 13 Not compatible with IO expansion board V7.1. The control port is four, which reduces the overhead of the Arduino digital ports, and easy to program.	Suitable for driving bipolar stepper motors. SPI serial bus control or STEP/DIR signal control. Controllers such as Mega with full port expansion. 256 times microstep subdivision.	Use mirror motor to drive DRI0017 to aviod the conflicts . Support PWM speed control. Support PLL advance speed control

• Input Voltage: 8.2-45 VDC
• Output current: 1.6 A (Limited)
• Working voltage: 3.3/5 V
• Driving pin: D4, D5, D6, D7, D8, D12
• Microstep resolutions: full, 1/2, 1/4, 1, 8, 1/16, 1/32
• Support Dual Bipolar Stepper Motor
• Support XBee interface
• Compatible with the Arduino UNO R3, Leonardo, Mega microcontroller
• Dimension: 83 * 55 * 25 mm/3.26 * 2.16 * 0.98 inches
• Weight: 48 g

• WIKI (Stepper Motor Shield For Arduino)
• DRV8825 datasheet
• Shield Shield Schematic
• DRV8825 Schematic
• Historical version: Stepper Motor Shield for Arduino (A4988)

• SDual Bipolar Stepper Motor Shield for Arduino (DRV8825) x1

Connect your Arduino device to the Internet with this Ethernet Shield. This Ethernet Shield is based on the W5200 Ethernet Chip and provides an easy way of getting your Arduino Online. Just plug this shield onto your Arduino UNO or Mega board, connect it to your network with an RJ45 Ethernet Cable (not included) and follow few simple instructions, you will be able to explore the world with the Internet. Besides, the shield has a microSD card port for large capacity data storage like Webpage data when applied in complicated applications.

The W5200 chip is a Hardwired TCP/IP embedded Ethernet controller that enables easier internet connection for embedded systems using SPI (Serial Peripheral Interface). W5200 suits best for users who need Internet connectivity for the application that uses a single chip to implement TCP/IP Stack, 10/100 Ethernet MAC, and PHY.

The W5200 is composed of a fully hardwired market-proven TCP/IP stack and an integrated Ethernet MAC & PHY. Hardwired TCP/IP stack supports TCP, UDP, IPv4, ICMP, ARP, IGMP, and PPPoE, which has been proven in various applications for many years. W5200 uses a 32Kbytes internal buffer as its data communication memory. By using W5200, users can implement the Ethernet application they need by using a simple socket program instead of handling a complex Ethernet Controller.

SPI (Serial Peripheral Interface) is provided for easy integration with the external MCU. Using the only 4 pins of SPI to connect with MCU, it is possible to design for small form factor system with the MCU’s I/O pin limit. In order to reduce the power consumption of the system, W5200 provides WOL (Wake on LAN) and power-down mode. To wake up during WOL, W5200 should be received a magic packet, which is the Raw Ethernet packet.

 

• Support Hardwired TCP/IP Protocols: TCP, UDP, ICMP, IPv4 ARP, IGMP, PPPoE, Ethernet
• Supports 8 independent sockets simultaneously
• Support Power down mode
• Support Wake on LAN
• Support High Speed Serial Peripheral Interface (SPI MODE 0, 3)
• Internal 32Kbytes Memory for Tx/Rx Buffers
• 10BaseT/100BaseTX Ethernet PHY embedded
• Support Auto Negotiation (Full and half duplex, 10 and 100-based )
• Support Auto MDI/MDIX
• Support ADSL connection (with support PPPoE Protocol with PAP/CHAP Authentication mode)
• 3.3V operation with 5V I/O signal tolerance
• Multi-function LED outputs (Full/Half duplex, Link, Speed) 

• Product Wiki
• Library Download

• DFRduino Ethernet Shield for Arduino – W5200  x1

RS485 is an industrial standard for long-distance, anti-interference, and reliable communication. The Arduino RS485 shield, specially designed for the Arduino Uno board. It converts UART/Serial protocol to the RS485 protocol.  This RS485 board allows Arduino talk to industrial devices.

In contrast to RS-422, which has a single driver circuit that cannot be switched off, RS-485 drivers use three-state logic allowing individual transmitters to be deactivated. This allows RS-485 to implement linear bus topologies using only two wires. The equipment located along a set of RS-485 wires is interchangeably called nodes, stations, or devices.

• Integrated a standard RS485 port, a mini RS485 port, RS485 headers
• Provide the welding areas to make full use of the free space. And more importantly, it’s convenient for your DIY design.
• Switch between automatic mode and manual transmission mode, which expands the scope of application.
• Besides Tx/Rx interface, there is a switch to block/disable this shield, when Arduino needs to be programmed.
• Gold immersion PCB. Long pins on the back adapt to most Arduino controllers.

What is RS485?

“RS-485 enables the configuration of inexpensive local networks and multidrop communications links. It offers data transmission speeds of 35 Mbit/s for distances up to 10m and 100 kbit/s up to 1200 m. Since it uses
a differential balanced line over twisted pair (like RS-422), it can span relatively large distances up to 1,200 m (4,000 ft). A rule of thumb is that the speed in bit/s multiplied by the length in meters should not exceed
108. Thus a 50-meter cable should not signal faster than 2 Mbit/s.” From Wiki.

• Power module: +5V
• Module size: 55mmx53mm(2.16″x2.08″)
• 16 digital IO ports (including an I2C interface)
• 6 analog IO ports and power
• Operation and programming mode switch
• Automatic and manual transceiver mode switch (When in manual transceiver mode, the enable end is the 2nd digital IO port)
• Transceiver indicating LED
• Standard RS485 interface, mini RS485 interface, and RS485 pins
• Welding area
• Reset switch
• PH2.0 sensor interface for DFRobot RS485 series sensor: URM04 Ultrasonic sensor

• Wiki (Arduino RS485 Shield)
• Schematic

• RS485 Arduino shield     x1

This is a laboratory probe, it can’t be immersed in the liquid for too long time. You can check here for the whole Analog pH Sensor / Meter Pro Kit
For Arduino or a spare Industrial Probe as a replacement

What is pH?  

“pH stands for the power of hydrogen, which is a measurement of the hydrogen ion concentration in the body. The total pH scale ranges from 1 to 14, with 7 considered
to be neutral. A pH less than 7 is said to be acidic and solutions with a pH greater than 7 are basic or alkaline.” 

Note: Buffer solutions are not included.
After you received your package! You may found some white particles on the
protection foam which is the KCl crystallization from the cap. Please don’t worry about the crystallization in the packing box, that’s normal. Actually, since the transportation restriction on liquid,
we have poured out the KCL3N solution in the cap, the slight crystallization in the packing box should be leaked since the remnant. Anyway, once you received the probe, you should store it in KCL3N solution,
you can not leave it in dry circumstances.

• Water quality testing
• Aquaculture

• Module Power: 5.00V
• Module Size : 43 x 32mm(1.69×1.26″)
• Measuring Range :0 – 14PH
• Measuring Temperature: 0 – 60 ℃
• Accuracy : ± 0.1pH (25 ℃)
• Response Time: ≤ 1min
• pH Sensor with BNC Connector
• pH2.0 Interface (3-foot patch )
• Gain Adjustment Potentiometer
• Power Indicator LED

Project 1. Arduino Project: pH sensor Working, application & Calibration “Water Quality Monitoring”

Introduction: This tutorial is about how to use the pH sensor with Arduino and find the pH value of different liquids “Water, Milk and Cold rink”, and display the pH value on the serial monitor.

Project 2. IoT based Water Quality monitoring using Arduino, pH Sensor, Nodemcu ESP8266 & Blynk

Introduction: This project will show how to make an IoT based water quality monitoring system using Arduino, pH Sensor, Nodemcu esp8266 wifi module and Blynk Application.

Project 3. How to connect pH sensor with arduino

Introduction: This project shows how to connect pH sensor with arduino.

Project 4. Water Quality Monitoring Using MKR1000 and ARTIK Cloud

Introduction: Water quality data monitoring for swimming pools, fish aquarium and more!

Project 5. How to Make An Automatic Water Changing System

Introduction: This simple system detects water quality through simulation Gravity: Analog pH Sensor / Meter Kit For Arduino and
Gravity: Analog Turbidity Sensor For Arduino, and supplies and drains water through the submerged pump and solenoid valve.

• Wiki (PH meter)
• pH and EC Probe Holder 3D Model (by Rayuela)
• Schematic
• PCB layout
• PH composite electrode manual
• Arduino sample code / ph sensor arduino
• Zips for all above

• Gravity: Analog pH Sensor / Meter Kit For Arduino x1
• pH probe (BNC connector)  x1
• pH sensor circuit board       x1
• Analog cable  x1

If you are worried about the chaotic tangle of wires on a breadboard or intimidated by the trepidation of soldering holes on a perforated board, then you’ve come to the right place. Gravity, a set of electronic module interface specifications formulated by DFRobot, provides the solution you need.
By utilizing the Arduino Gravity IO expansion board in conjunction with Gravity modules, you can effortlessly establish connections with a single cable. Whether analog, digital, or I2C modules, easily identified wiring colors liberate you from the tension that precedes every power-on moment.
There is no need for wire strippers or soldering irons to experience the enchantment of Arduino. Furthermore, it is compatible with both the Arduino UNO R3 and Arduino UNO R4.

Moreover, this Arduino IO expansion shield has a range of features, such as wide voltage input, an Xbee module socket, a UART fast toggle switch, a 3.3V voltage selection jumper, and dedicated power protection for servos. These functionalities elevate the expandability of your Arduino to new heights.

Furthermore, using the Gravity IO expansion board does not imply the obligation to exclusively use Gravity modules. On the Gravity IO expansion board, it remains convenient to employ other non-Gravity modules by easily connecting them using DuPont wires.

Schematic diagram for using the expansion board

If you are using development boards such as ESP32, micro:bit, Raspberry Pi Pico, etc., you can also take a look at the Gravity IO expansion boards designed by DFRobot specifically for these boards.

Arduino MEGA2560:

   – Gravity: IO Sensor Shield For Arduino Mega2560

micro:bit:

   – IO Extender for micro:bit

Raspberry Pi Pico:
Gravity:

  – Expansion Board for Raspberry Pi Pico

FireBeetle 2 ESP32-E:

   – Gravity: IO Shield for FireBeetle 2

• 3.3V/5V operating voltage select
• Switch for wireless communication & programme
• More Easily recognitive interfaces
• Colorful header for illustrating digital or analog pins
• Immersion gold surface

• Input Voltage
• 7-12V, PWR_IN
• 4.8-6V, SERVO_PWR, depending on your servo
• Compatible module voltage: 5V/3.3V
• Support interface: I2C, SPI, Xbee (Xbee pro), Bluetooth, APC220

Project 2. Spectrophotometer Experiment Based on AS7341 Spectral Sensor

Introduction: This project uses DFRobot AS7341 Spectral Sensor to make a simple spectrophotometer,
and carry out an experiment to measure substance concentration in different solutions by collecting data, fitting curve, etc.

Project 3. How to make a Smart Rock-Paper-Scissors Game Robot

Introduction: This project made a smart rock-paper-scissors robot and bring it to campus maker carnival.

Project 4. Build KnowFlow: automatic water monitor

Introduction: KnowFlow is the name of this water quality monitoring device, based on
Arduino Uno.
It can automatically monitor 5 parameters of water: pH, Temperature, Dissolved Oxygen, Electronic Conductivity, ORP.

Project 5. How to Make An Automatic Water Changing System

Introduction: This simple system detects water quality through simulation Gravity: Analog pH Sensor / Meter Kit For Arduino and Gravity: Analog Turbidity Sensor For Arduino,
and supplies and drains water through the submerged pump and solenoid valve.

• Wiki Doc        
• Schematic

• IO Expansion Shield for Arduino V7.1 x1

The URM04 Ultrasonic sensor is developed based on our popular URM37 ultrasonic sensor, it is using RS485 interface which allows multiple sensors to be used simultaneously. The RS485 interface allows a number of sensors to work together.
Up to 32 URM04 may be connected together in a network.

The ultrasonic sensor allows you to determine the exact distance of an obstacle in the sonar field of view. The cleverness of your robot will depend on a sensitive sensor similar to the one bats use to know their position and track prey.
With advanced programming, you can design compensators in order to perfectly control your motors according to the obstacle’s distance.

NOTE: This sensor REQUIRES an RS485 interface. It can not be connected directly to an Arduino. To make the connection easily we
recommend using our Arduino RS485 Shield.

URM04 Beam Angle

• Operating Voltage: +5V
• Current: <20mA
• Operating Temperature: -10℃～+70℃
• Detecting range: 4cm-500cm (1.6in-197in)
• Resolution: 1cm (0.4in)
• Frequency: 40KHz
• Interface: RS485
• Units: Range reported in cm
• Temperature sensor: 12 bits reading from serial port
• Default Device Address: 0x11
• Default Device baudrate: 19200
• Size: 34×51 mm (1.3×2 in)
• Weight: 30g

• URM User manual
• WIKI (URM04 Ultrasonic Sensor (RS485)  SKU:SEN0002)
• Test Software
• Test software source code
• Arduino Sample code
• Sample from rxcoder

• URM04 v2.0 Ultrasonic Sensor (x1)
• Wire with 4p JST connector(x1)