Arduino XBee send and receive data

How to send data from Arduino Xbee and receive it from C#

  1. I have an Arduino XBee shield and I have a Sparkfun XBee USB explorer. I would like to send data (temperature sensor) that comes from the Ardunio XBee and receive it in my C# programme. For now, let's say I want to send 45, 100 to my C# programme
  2. This XBee is in receiving mode. An Arduino is connected to the MacPro. The Arduino is connected via 4 wires to another XBee module. This XBee module works in transmit mode. The Arduino sends a character of the alphabet to the XBee every second. First 'A', then 'B', all the way to 'Z', then 'A' again, ad infinitum
  3. Verici:Arduino ile bir sensörden sıcaklık değerlerini okuyoruz. Bu değerleri UART protokolü ile XBee modülüne aktarıyoruz.Alıcı:XBee verileri alır, Arduino t..
  4. How to Use XBee Modules As Transmitter & Receiver - Arduino Tutorial : In this tutorial we will use two xBee (series 1) modules with the Arduino uno board. We will configure them to act as a receiver and transmitter to control the brightness of an LED wirelessly by using one potentiometer.The xBee - series 1 - modules
  5. Hi everyone I want to send and receive data of temperature and humidity from DHT22 sensor. I'm already write a transmitter code. The program can compile. I think XBee transmitter side can send temperature and humidity data correctly XBee transmitter side (router) code #include <XBee.h> #include <Printers.h> #include <AltSoftSerial.h> #include <SoftwareSerial.h> #include <DHT.h> #define.
  6. Re: Xbee series 1, Arduino, serial data transmit and receive #181250. By Valen - Wed Apr 15, 2015 9:49 pm. - Wed Apr 15, 2015 9:49 pm #181250. Register IA is more for line-passing, and set on the receiving Xbee. And indicates the address of the Xbee that is allowed to change the outputs of the receiving Xbee. That is different from what you want

Verici:STM32 ile bir sensörden sıcaklık değerlerini okuyoruz. Bu değerleri UART protokolü ile XBee modülüne aktarıyoruz.Alıcı:XBee verileri alır, Arduino tar.. The upload process sends data from your computer to Arduino and Arduino sends status messages back to the computer to confirm the transfer is working. The recipes here show how you can use this communication link to send and receive any information between Arduino and your computer or another serial device

Tutorial: Arduino and XBee Communication - dftwik

Send/Receive Data in from Arduino to Arduino with XBee

  1. al in X-CTU). I want to ultimately poll/sync the outputs of my Arduinos + Routers so they don't output at the same time i am working on wireless sensor network for industrial.
  2. Send and receive Bluetooth data¶ XBee3 modules have the ability to send and receive data from the Bluetooth Low Energy interface of the local XBee device through User Data Relay frames. This can be useful if your application wants to transmit or receive data from a cellphone connected to it over BLE
  3. system March 6, 2013, 6:20pm #1. I'm trying to practice a bit more with XBees, and I wanted to try to use 2 potentiometers connected to one arduino to control 2 servo motors connected to another arduino via xbee. I'm using XBee series 1. I saw the EasyTransfer library and thought that maybe this is the best way to go for a beginner like me
  4. How to send data from Arduino Xbee and receive it from C#. 0. Xbee communication from Computer to Arduino - SoftwareSerial Pins. 0. Arduino with XBee Series 1 and Wireless SD Shield, Receive Data. 1. Receiving data on XBee module on a XBee explorer from a XBee module on an Arduino. 1
  5. 2. Like I said I'm using xbee wi-fi s6b and XCTU. In the XCTU I setup xbee (Soft AP mode) and SSID. Now I have problem: I'm connected to xbee (like wifi connection) and in XCTU console I dont see any data receiving from arduino program. 3. I will try to send data from arduino-->xbee-->to digi cloud. I added xbee into it by MAC address
  6. The according to values read by arduino the data's are transmitted wirelessly through the xbee, where the data are received by xbee mounted on robot and the data is given to microcontroller to process and control the direction of robot by giving input to motor driver L293D IC from digital pins of microcontroller by making the pin high
  7. It's common to have dumb nodes using XBee modules in AT mode (serial cable replacement scenario) and a central API mode coordinator that can multiplex the communications by processing the API frames to identify the source of the data. So configure a router with ATDH and ATDL set to 0, and then send some serial data. You should see an API.
XBee - Star - Wiki de Reso-nance Numérique

0. Yes, you can send data from 400 XBees to a single xbee. I would like to clarify one thing. XBees are connecting to a network, not to a particular xbee. And the devices connected in a network can communicate each other. Share. Improve this answer. edited Mar 24 '18 at 20:54 The aim of my project is to send the sensor data from the portable device using xbee wirelessly over to my host controller and displaying out on the arduino serial monitor. I've managed to configured the two xbees. But now, i'm unsure of how im going to transmit and receive the data

How to Use XBee Modules As Transmitter & Receiver

i connect both Xbees to XCTU, and coordinator broadcast data properly. either with coding from arduino, and frame generator from Xbee. but Xbee router (receiver) only receive packet data from frame generator, and does not able to receive data from arduino, even if the protocol code is the sam Interfacing nRF24L01 with Arduino UNO - Receiving Side. The receiver side consists of an Arduino UNO, nRF24L01 module, and 16*2 LCD module. The receiver side nRF module receives the data from the transmitter and sends it to Arduino. Interfacing of the Arduino with nRF24L01 and LCD module is shown below. nRF24L01 I already can write and send data from the Xbee to another Xbee module by the Arduino. My problem is that I want to configure the Xbee by the arduino. I am sending '+++' with the arduino to my Xbee and want to receive the 'OK' from the Xbee with the serial monitor from the arduino editor The problem is that the connection is only one way. I can send data from the XBee attached to the Arduino and receive it in the XBee attached to my computer, but when I try to send data in the opposite direction, the XBee attached to the Arduino never receives it

XBee API mode receive data from DHT22 sensor - Arduin

  1. What i'm trying to do at the moment and failing is to send the data from the coordinator xbee to ThingSpeak via wifi. I only have the normal arduino wifi shield thats piggy backed onto the arduino. I've connected the xbee s2 to the 5v, ground and the Rx of the wifi shield
  2. A program to send and receive data over the XBee's using Arduino . Sending temperature data over the XBee's; In any network of XBee's there has to be one coordinator. There can only be one coordinator. For our exercise, we will have two XBee's, one configured as a coordinator and the other as an end device
  3. The idea of using an Arduino to transmit data and NodeMCU to receive data is that it will have a more practical application like the Arduino can collect some sensor parameters and send it to the NodeMCU via ZigBee, then NodeMCU can process this data and share it or take any action via the Internet as required

I am trying to send serial data from arduino to xbee (series1) and then send to another xbee (series1) wirelessly in API Mode with escapes. However, can not receive or see the data on X-CTU. Following is the code. I deeply appreciate your help Need help configuring Xbee to send and receive data Hey guys so I have a Xbee Pro 900. What I want to do is have one Xbee/Arduino combo send data and another combo to receive the data 7: The PROP sends data to the XBee to send to the socket verifying data was received successfully. In this case Moving Right.. 8: The controlMovement COG should pick up the change to the flag move_EW_flag and process the change (Right here is where it fails 50% of the time) Hope this is not too confusing The XCTU software can be used on the PCs to send and receive data between the PCs and the Xbee modules. Before using Arduino UNO with Xbee modules, a bare minimum sketch must be uploaded on it or the Atmega microcontroller must be removed from the board. The Xbee module can be provided power by an external power supply or from the Arduino Similary zigbee receive intructions from other zigbee to which it have address. After receiving instructions or data from other zigbee. It send data to arduino through serial pins as shown in connection. Similarly other module can be connected with one more Arduino or computer. Same connection diagram is used for other zigbee and arduino pair

Download and Install the Phant Arduino Library. The sensational creators of the SparkFun data stream service have developed an Arduino library to make posting data to a stream as easy as can be. The Phant Arduino library helps to manage keys and fields, and even assembles HTTP POSTs for you to send to a server The Arduino will send the data when it wake up and then go to sleep. What I think is make ACK at Pi and send it when Pi receive one of Xbee router's data. Does the code below are necessary? serialport.on(open, function {var frame_obj = {type: 0x10, id: 0x01, //destination64: 0013A20040D8DA8D, destination64. On the other side, the coordinator will receive the message and interpret it. If it is in AT mode, just read the serial. In API, you have to decode the packet and check the payload field where the data is located. Need help to send serial data from arduino to XBee and to another XBee wirelessly? 1. XBEE coordinator WITH or WITHOUT Arduino? 2

Xbee series 1, Arduino, serial data transmit and receive

A simple example of receiving data from the Arduino. Arduino to Visual Basic 2013 Communication. The example uses a very simply form and shows what ever it recieves from the Arduino in a text box. The Arduino Sketch. The Arduino Sketch sends the string 1234 over the serial connection once every second Similarly, my arduino uno is connecting with meter via Modbus. My problem is the command from Xbee Coordinator (i configured to send String First) cant go to Xbee Router (Xbee Router connect with Arduino Uno by Arduino Shield) which i set to receive command from Coordinator. (My Coding is I've been able to send data from the Router xbee (located on pc) to the Coordinator xbee (located on arduino) and succesfully turned on/off an led, this was done in Java. Now I am trying to send a message from the arduino side to the pc side and display the message in my java app. However, I have not had any luck Next, connect the XBee Explorer pin OUT to Arduino pin 2 (RX), and XBee pin IN to Arduino pin 3 (TX). can XBee transmit and receive at the same time? Yes, it is possible to send and receive data at the same time. When XBee modules are configured in AT mode (also referred to as Transparent Serial), you configure the DH and DL parameters to.

Send/Receive Data in from STM32 to Arduino with XBee - YouTub

The microcontroller, however, will only be able to receive data from the XBee module, not over USB from the computer. With the jumpers in the USB position (i.e. on the two pins nearest the edge of the board), the DOUT pin the XBee module is connected to the RX pin of the FTDI chip, and DIN on the XBee module is connected to the TX pin of the. xbee_serial_array. Communication. sends and receive string data in mode api with variable length. Supports xbee S2 S3 models. Author: cDn_NeMeSiS. Maintainer: cDn_NeMeSiS. Read the documentation. Compatibility. This library is compatible with the avr architecture so you should be able to use it on the following Arduino boards: Arduino Micr

4. Serial Communications - Arduino Cookbook [Book

Step 2: Install the xBee module in the explorer board, and also install the xBee shield in the Arduino UNO. Note: Make sure you have correctly installed the module and shield onto the boards, facing the correct direction. Step 3: Wirelessly send your data. Move the switch on the wireless shield to the D4/D5 What i'm trying to do at the moment and failing is to send the data from the coordinator xbee to ThingSpeak via wifi. I only have the normal arduino wifi shield thats piggy backed onto the arduino. I've connected the xbee s2 to the 5v, ground and the Rx of the wifi shield New! https://ralphbacon.blogUse your Arduino to transmit (and receive) data reliably with this easy-to-use module. The nRF24L01 module achieves this beautifu..

arduino uno - Receiver xbee receiving data even if the

Now, pressing the button on the Send XBee/Arduino flashes the light on the Receive XBee/Arduino. If this does not happen, see the Tips section. Once students have accomplished this, suggest further challenge activities, such as: Test the range of the module. Switch the Send and Receive teams Arduino 1.5 and later. Arduino now includes a library manager for easier library installation. From the Sketch menu select include library->Manage Libraries, then type xbee in the filter and install. Prior to Arduino 1.5 installation is a manual. Download a .zip or .tar.gz release from github Arduino Wireless SD Shield Tutorial: As the name implies, the Arduino Wireless SD shield serves two functions. Foremost, this shield allows you to easily interface with Xbee transceiver modules to create mesh networks, and other wireless devices. Secondly, the micro SD socket allows y Hello, i have been spending the last day or so trying to get my 2 (soon to be 3) xbee pro S2B to communicate with each other. in AT mode that works fine they both can send and receive. when in API mode the Coordinator(PC) can send messag.. The problem is that I can receive data but can't send data. I also can't upload any code to the Arduino as long as the Xbee is connected. As soon as I disconnect the TX/RX lines (pins 1/0 respectively) on the UNO, I am able to upload code to it (after hitting the reset button on the UNO). Now, I can send the 'l' and 'h' commands (see code below.

Send/Receive Data in from STM32 to Arduino with XBee - YouTube

XBee S2C Module Pinout, Interfacing Examples, Applications

communication at moderate speeds XBee may be the solution for you! XBees are hugely popular wireless transceivers for a number of reasons. They're flexible - they send and receive data over a serial port, which means they're compatible with both computers and microcontrollers (like Arduino) Sending Data to an XBee Device ¶. In order to send data to an XBee device, use the send () method: xbee.send(at, frame='A', command='MY', parameter=None) This example will request the 16-bit address of the connected XBee device with an API frame marker of 'A'. For your convenience, some optional data fields are not required 3.3V. 5V. XBEE. The Wireless Proto shield allows an Arduino board to communicate wirelessly using a wireless module. It is based on the Xbee modules from Digi, but can use any module with the same footprint. The module can communicate up to 100 feet indoors or 300 feet outdoors (with line-of-sight). It can be used as a serial/usb replacement or. I am not using buttons to establish connection with Arduino, instead I am opening the connection when activity is loaded, I am able to receive and use data in activity. The problem is, when I close the app and open it again without unplugging the USB or OTG cable, I am not able to receive data in my app Following the python-Xbee library and an example, I am trying to communicate between 2 XBees. Using XBee S2C Setup: Coordinator API=2, running the code in python @ Mac Router AT mode, running python code @ Mac. Below data sending code runs in API mode at coordinato

An XBee Series 2 is set to Router AT whose TX and RX pins are connected to an Arduino Nano's Rx and Tx pins respectively. The Arduino is connected to a Mac OSX via USB. A second XBee Series 2 is connected to a Windows system via USB. It is set to Coordinator API mode.. Using the sketch below on the Arduino, a packet is sent from the Router AT XBee to the Coordinator API XBee, which is seen by. We'll need an Arduino and a XBee shield. For the gateway we must take the microcontroller (Atmega328) out from the arduino and set the jumpers to USB position. Using the gateway connection we can send / receive AT commands directly from our PC to the Bluetooth module. One of the devices we'll find is a Linksys USB-Bluetooth adapter connected to. How to send data through XBee using ATMega328? When I physically connect (1), (2) and the computer USB, I can receive on my computer data sent by (1) at 115200 Kbps. But when I physically disconnect (1) and to (2), and link them again using the XBees the computer receives no data. I noticed that in (1) the UART Tx and Rx are directly connected. Step 1: Connection Go to index. Connect the XBee shield to Arduino and then connect XBee module or you can connect it directly to Raspberry Pi connection bridge. Connect the LDR with a resistor in the breadboard as you can see in the next diagram. Connect two wires, red and black, to the two long rows on the side of the breadboard to provide. This example is for Series 1 (10C8 or later firmware) or Series 2 XBee radios. Two XBee are needed for this example. This example will be using two xbee attached to an arduino (Leonardo/Mega) for two serial bus. One XBee will be transmitting a data packet while another XBee will receive and output the data to the serial bus. */ // Configuration.

READING THE DATA Data is tranmsitted between Xbee's in the form of API packets or data frames. These API data frames have a very well defined structure and understanding this structure is crucial to derive the transmitted data from the API data frame. The following is an Arduino code which reads the API data frame and prints it An Arduino script will wait until serial data is available, extract the brightness values for the 3 LEDs, assign them to analog values (0-255), instruct the onboard microcontroller to write these values to the LEDs, and then will send the mapped values (0-255) to the Rstudio-Arduino serial interface

GitHub - cDnNeMeSiS/xbee_serial_array: send and receive

Step 4: Code. Once you have finished configuring the xBee module, upload the code below onto your arduino board. The code basically takes the received data packet and sifts out the RSSI code then displays it on the serial monitor and on the LCD screen. This way you are able to tell how far the transmitting xBee module is from the receiving. Hello, I am using 2 numbers xbee pro s1 (xbp24-10ef) ,i can't able to receive any packet data on arduino mega .i can able to communicate between two xbee module via xctu software.But arduino mega i tried xbee code on serial port1.No packet is recvng. xbee.readpacket() is not working.

Arduino with XBee Series 1 and Wireless SD Shield, Receive

Besides that, the Arduino can also act as a remote control. The IRemote library, however, isn't limited to sending and receiving information that follows one of the more commonly used IR remote control protocols. It can also send and receive raw data, which allows the Arduino to communicate with many other devices wirelessly Receiving Serial Data in Arduino . We want to receive data on Arduino from a computer or another serial device. For e.g. we have to send data from the computer or commands to Arduino. This is also the best use of Serial communication in Arduino. It's easy to receive 8-bit values (chars and bytes) because the Serial function uses 8-bit values Data you send on computer Transmitter show on Arduino Receiver screen. It should work the same way except instead of sending the data and displaying it, it should send the data and the other arduino will accept it as a value for distance or something. 0. FurkanK15. 5 years ag A microcontroller, processor or PC can send data through the serial interface to the Xbee module (transmitter) and the Xbee module wirelessly transmits the data to other Xbee module (Receiver). In order to transmit or receive data on Xbee modules, they need to be properly configured on the same network. Arduino_sends_data_to_xbee.

In this mode, the Arduino can access to a wider range of XBee data than in AT mode. (There is an Arduino library available to assist with API mode.) In API mode, there is a specific packet type that the XBee can send to the Arduino which contains the RSSI value. The Arduino would send an api packet to the XBee requesting that packet type, and. The XBee module is one of the most popular wireless platforms around. It allows data to be passed over the air to another device hundreds of feet away. In this tutorial, we are going to learn about the XBee and cover how you can connect your XBee to your Arduino Uno Arduino Wireless Programming With XBee Series 1 or 2: Hi. This Instructable will guide you through the process of wirelessly programming your Arduino using two XBees. I just finished designing a wireless EEG system with the XBee modules, so I've become quite flu Step 1: The XBee Mesh Kit. The kit being used for this project is the XBee mesh kit (Part Number: XKB2-Z7T-WZM) from www.digi.com. The XBees used are the Series 2 model (this is critical as a series 1 model only allows communication between a maximum of 2 modules). This kit comes with 3 XBee radios included and since the system is modular in. It removes the Phant library, and all of the XBee configuring. All it does it construct an HTTP GET and send it out the XBee. It assumes the XBee is already connected to WiFi, and the destination server/port are already set up (which it should be, if you've run the other sketch to configure it). It works for me

XCTU - Setup your xBee modules - Ardumotive Arduino Greek

Receiving Data Over I2C. The master Arduino also needs to receive the potentiometer position from the slave Arduino. To receive data over I2C, we use the following three functions: Wire.requestFrom() Wire.available() Wire.read() Wire.requestFrom() The complete syntax to request data from a slave device is Wire.requestFrom(address, quantity) As soon as the Arduino receives data from the openFrameworks platform it will respond with a message. Upload the below code to the Arduino in order for it to send and receive the data. Note: Avoid opening the serial monitor, since openFrameworks uses the same COM port. // Code to send and receive data from openFrameworks bool ledState = false. Tutorial_14_xbee. We will examine the Series 1 XBee wireless data transceivers from Digi in the USA. Although in the past we have experimented with the inexpensive 315MHz transmit/receive pair modules (chapter 11), they have been somewhat low in range and slow with data transmission. The XBee system changes this for the better

How To Transmit Mouse Data Using Xbee With Arduino- (Part

Xbee's are products names for radio communication modules made by Digi. These modules are popular because they are easy to add to embedded designs. They are most convenient and easy to use with Arduino Uno board to transmit and receive data wirelessly at greater range and higher speeds Router: A router is a full-featured ZigBee node. This device can join existing networks and send, receive, and route information. Routing involves acting as a messenger for communications between other devices that are too far apart to convey information on their own.Can buffer wireless data packets for sleeping end device children With this code, if you send data and call Receive() Before wiring the Arduino to the XBee, we'll need to load our software onto the board. The Arduino software should recognize the Arduino.ini file, once loaded simply compile and load the program onto your board. Once it's programmed, disconnect the Arduino and wire the XBee to it like so

Firstly, we're using SoftwareSerial to enable serial communication on any of the pins on our Arduino. Using the XBee Shield, we will need to setup our XBee as communicating on pins 2 and 3. Do this by using the function. SofwareSerial XBee(2,3) But do it after you include the software serial library in the sketch Each module is connected to Arduino NANO board and 1.44 LCD TFT Screen which is responsible for read/write and display data packet from local XBee. AT mode allows user to send/receive. The XBees were used to send commands to control the quadcopter, as well as to receive data from the quadcopter providing telemetry information about the vehicle. Hardware Setup. I'll cover the following three setups in this blog: XBee-to-USB board that plugs into the desktop computer and is used by the desktop ap The receiver will then receive the byte array from the other Arduino and interpret it there. Below is the code for the receiver. Note that this code is intended for a Mega since it will interpret the data received from the other Arduino and then print to the Serial Monitor what it received so that the user can check it The pin number 2, UART Data Out is connected to the RX1 pin of the Arduino pro mini board and pin number 3 UART Data In is connected to the TX0 pin. The implementation of the project which can receive the data from PS2 mouse and transmit the X-Y coordinate extracted from the mouse data through Xbee is represented using the following block diagram

XBee: How do I create a packet? - Arduino Stack Exchang

xbee.send(data); String message = xbee.receive(); data is a string which can contain sensor data or status messages. receive() returns a string containing any message addressed to this payload, which typically command some sort of action or request specific data for transmission 2. The SX1272 LoRa module can send data between devices to create a communications network. Each node is able to send and receive messages and the identification of the node must be done in the code. The address of each node must be unique in the network and constrained to values between 1 and 255 (0 is the broadcast reserved address) The microcontroller will send the Command Mode Sequence over UART which will place the XBee module in Command Mode. The microcontroller will wait to receive the OK signal from the XBee module; Once the OK signal is received, the microcontroller will send the command string ATID over XBee UART Receive serial data transmitted from remote XBees to a connected local XBee. Send serial data from the local XBee to individual remote nodes. Change some of the basic settings on local and remote XBees. Useful Resources. XBee is a wireless communication module that Digi built to the 802.15.4/ZigBee standard. If you are unfamiliar with XBees and.

Arduino Adventures: Using the XBee with the Arduino on Mac

Transmit AND receive data from two XBee (ZigBee) S2 radios

If there is a solution to get the reader to send tag ID to the arduinos serial that would be perfect, if anyone can think of anything. Or if I could bypass the arduino all together and just have the RFID reader send the signal via the Xbee straight to the other Xbee. Thanks for reading and will supply any extra info needed The XBee®/XBee-PRO® RF Module was designed to mount into a receptacle (socket) and there-fore does not require any soldering when mounting it to a board. The XBee Development Kits con-tain RS-232 and USB interface boards which use two 20-pin receptacles to receive modules. Figure 1‐02. XBee Module Mounting to an RS‐232 Interface Board Send command ATID68\r to set the network ID to 68, then wait for OK\r string; Send command ATCN\r to exit command mode, then wait for OK\r string; The XBee should now be ready to send and receive data using SoftwareSerial's reading and writing functions. You can find a reference and full function list for SoftwareSerial here #include < EEPROM.h > #include < SoftwareSerial.h > SoftwareSerial xbee How to send data to arduino (in c) through usb from c#. Send Data From Arduino to ASP.NET. how to send bytes of data to be read on the serial monitor of arduino uno. Visual Basic Graph of Serial Input is Not Correctly Reading Arduino Output

XBee Setup In this step we will configure one receiver (router) and one transmitter (coordinator) XBee. We will use free software XCTU for this configuration. Users can find more information about XBee programming in this software's website. 1. Plug in the XBee to the USB adapter and plug it to your PC. After your computer finishes downloading the necessary drivers run XCTU He was able to talk to Xbee module by using PySerial library. The code takes care of sending and receiving message frames. Same applies to Arduino part which also has to be able to receive and send message packets in API mode. For those who want to dig deeper, there is a source code available in Github. [..Source link.. Since the Xbee modules communicate using serial communication protocol with the interfacing devices they can be connected to a microcontroller using a minimum of four pins, Power supply, and Ground, UART Data Out, and UART Data In pins.The pin number 2, UART Data Out is connected to the RX1 pin of the Arduino pro mini board and pin number 3. MegunoLink is a customizable interface tool for Arduino sketches. Configure MegunoLink projects from our set of visualizers to send commands and receive data: from your Arduino program to control the interface, and; from MegunoLink to control your sketch

arduino - XBee Coordinator API not receiving data from

Send data asynchronously¶ This sample application shows how to send data asynchronously from the XBee device to another remote device on the same network using the XBee Python Library. Transmitting data asynchronously means the execution is not blocked during the transmit request, but you cannot determine if the data was successfully sent A Swarm of Xbees! Arduino Xbee Wireless & More. Friday, April 15 th , 2011. In the past we have covered a few things that interact through serial, from RFID readers to controlling an Arduino's pins using the serial terminal. Serial as we have talked about it is actually know as [ [UART]], and operates over 2 pins RX and TX (receive and transmit) XBee and XBee-PRO 802.15.4: These modules let you use the radio protocol defined in the IEEE 802.15.4 standard directly. This is a fairly simple protocol designed for low-power, low-data-rate communication. It operates in the 2.4Ghz spectrum, just like Wi-Fi (defined in the IEEE 802.11bgn standards), but is a lot simpler, has a lower throughput, and has a much lower power usage On this Control unit, the Arduino UNO is getting the data from the smoke sensors and then sending this data via XBee to Remote Control. We have seen in the previous section that this data is then displayed over LCD. Moreover, when any button is pressed from the Remote Control, the command is received by this Arduino via XBee