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RPSMA Male to SMA Female Adapter
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Price: $3.39
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Sparkfun Item #: WRL-09232 -

"This is an adapter that converts an RP-SMA board to an SMA antenna. The adapter will connect to any of our 2.4GHz wireless boards (Bluetooth, Nordic, or XBee) or interface cables and will allow you to use an antenna/cable with an SMA connection. You should not need this adapter with any of our antennas or dev boards. These adapters are listed only to help SparkFun users that have rare or odd antenna coupling needs. Be sure to check out the SMA connector tutorial here for more information on...

Serial Wifi Module- USR232
Price: $41.38
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Elecrow Item #: EL-WWF2232USR -

     This Serial WiFi module is you best choice for you to connect your application to the internet. It is a complete ultra low power embedded TCP/IP solution. It is a standalone, embedded wireless 802.11b/g networking module. It incorporates a 2.4GHz radio, processor, TCP/IP stack, power management to let the users connecting to the internet with the serial port.     With the relative low price, this module suits for more IOT applications such as smart...

Serial WIFI Transceiver Module ESP8266
Price: $9.35
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Elecrow Item #: EL-WWI8266ESP -

     This serial WiFi transceiver module is based on ESP8266 SoC.. ESP8266 is a highly integrated chip that has Integrated TCP/IP protocol stack. It offers a complete and self-contained Wi-Fi networking solution, allowing it to either host the application or to offload all Wi-Fi networking functions from another application processor.      Besides, ESP8266 has powerful on-board processing and storage capabilities that allow it to be integrated with the...

Simblee BLE Module - RFD77101
Price: $34.69
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Sparkfun Item #: WRL-13808 -

"The Simblee BLE Module is a small Arduino-programmable Bluetooth 4.0 (BLE) module allowing you to get started playing with IoT (Internet of Things). The RFD77101 is a high performance, professional grade Bluetooth® Smart radio transceiver equipped with a built in ARM Cortex M0 microcontroller (with 128KB of Flash and 24KB of RAM, no EEPROM, running at 16MHz) that can be programmed using the simple-to-use Arduino IDE using Simblee extensions. Unlike other IoT offerings, Simblee integrates...

SMA Connector
Price: $3.39
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Sparkfun Item #: WRL-00593 -

"PCB edge mount - SMA RF connector. Perfect for prototyping with the GPS and Cellular devices that require an antenna connection. These connectors have a female signal pin and will correctly mate with the original SMA type antennas. Documents: Datasheet SMA Tutorial "

SMA Male to RPSMA Male Adapter
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Price: $3.39
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Sparkfun Item #: WRL-09233 -

"This is an inner thread (outer nut) adapter that will connect to any of our wireless boards or interface cables and allow you to use an antenna/cable that has an outer thread configuration. You should not need this adapter with any of our antennas or dev boards. These adapters are listed only to help SparkFun users that have rare or odd antenna coupling needs. Be sure to check out the SMA connector tutorial here for more information on SMA connectors. Supported Connections: Any RP-SMA or SMA...

SparkFun Base Kit for Intel Edison
Price: $155.11
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Sparkfun Item #: KIT-14105 -

"The Intel® Edison is an ultra-small computing platform that will change the way you look at embedded electronics. Each Edison packs a huge amount of tech goodies into a tiny package while still providing the same robust strength of your go-to single-board computer. The Edison is powered by the Intel® Atom™ SoC dual-core CPU and includes an integrated WiFi, Bluetooth LE and 70-pin connector to attach a veritable slew of shield-like “Blocks,” which can be stacked on...

SparkFun BLE Mate 2
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Price: $52.08
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Sparkfun Item #: WRL-13019 -

"This is the SparkFun BLE Mate 2, an efficient and reliable Bluetooth 4.0 development board. The BLE Mate 2 closely resembles a breakout board, in that nearly every pin on the on-board BC118 module is made available to access. This board is actually a close cousin to our Gold and Silver Bluetooth Mates and functions in a very similar way but, as the name implies, operates as Bluetooth Low Energy instead of Bluetooth 2.0. The BLE Mate 2 offers a six-pin header on the end opposite the BC118...

SparkFun Bluetooth Audio Breakout - BC127
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Price: $78.17
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Sparkfun Item #: WRL-11927 -

"This is a breakout for the BC127 Bluetooth Module. The BC127 is a highly flexible, low power, small form factor Bluetooth Version 4.0 Certified Audio module. This is an ideal module for developers who want to quickly and cost effectively integrate Bluetooth functionality into their products. The BC127 Breakout board provides basic access to all the pins on the BC127 module, along with a six-pin serial header with the same pinout as the FTDI Basic boards, allowing it to connect to boards like...

SparkFun Bluetooth Mate Gold
Price: $64.26
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Sparkfun Item #: WRL-12580 -

"The Bluetooth Mate Gold is very similar to our BlueSMiRF modem, but it is designed specifically to be used with our Arduino Pros and LilyPad Arduinos. These modems work as a serial (RX/TX) pipe, and are a great wireless replacement for serial cables. Any serial stream from 2400 to 115200bps can be passed seamlessly from your computer to your target. We’ve tested these units successfully over open air at 350ft (106m)! Bluetooth Mate has the same pin out as the FTDI Basic, and is meant to...

SparkFun Bluetooth Mate Silver
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Price: $48.60
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Sparkfun Item #: WRL-12576 -

"The Bluetooth Mate is very similar to our BlueSMiRF modem, but it is designed specifically to be used with our Arduino Pros and LilyPad Arduinos. These modems work as a serial (RX/TX) pipe, and are a great wireless replacement for serial cables. Any serial stream from 2400 to 115200bps can be passed seamlessly from your computer to your target. Bluetooth Mate has the same pin out as the FTDI Basic, and is meant to plug directly into an Arduino Pro, Pro Mini, or LilyPad Mainboard. Because...

SparkFun Bluetooth Modem - BlueSMiRF Gold
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Price: $64.26
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Sparkfun Item #: WRL-12582 -

"The BlueSMiRF is the latest Bluetooth****wireless serial cable replacement from SparkFun Electronics! These modems work as a serial (RX/TX) pipe. Any serial stream from 2400 to 115200bps can be passed seamlessly from your computer to your target. We’ve tested these units successfully over open air at 350ft (106m)! The latest version of this board also breaks out PIO4. Note: The remote unit can be powered from 3.3V up to 6V for easy battery attachment. All signal pins on the remote unit...

SparkFun Bluetooth Modem - BlueSMiRF Silver
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Price: $48.60
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Sparkfun Item #: WRL-12577 -

"The BlueSMiRF Silver is the latest Bluetooth wireless serial cable replacement from SparkFun Electronics! This version of the popular BlueSMiRF uses the RN-42 module which has a bit less range than the RN-41 module used in the BlueSMiRF Gold. These modems work as a serial (RX/TX) pipe. Any serial stream from 2400 to 115200bps can be passed seamlessly from your computer to your target. The remote unit can be powered from 3.3V up to 6V for easy battery attachment. All signal pins on the remote...

SparkFun Bluetooth Module Breakout - Roving Networks (RN-41 v6.15)
Price: $60.78
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Sparkfun Item #: WRL-12579 -

"This is a simple breakout for the Roving Networks Bluetooth module. All pertinent pins are broken out and labeled. This new version’s headers are unpopulated. Check below for appropriate headers. The module from Roving Networks is powerful, small, and very easy to use. This Bluetooth module is designed to replace serial cables. The Bluetooth stack is completely encapsulated. The end user just sees serial characters being transmitted back and forth. Press the ‘A’ character...

SparkFun Blynk Board - ESP8266
Price: $55.56
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Sparkfun Item #: WRL-13794 -

"Blynk is an easy to use app builder that allows users to add a variety of buttons, sliders, graphical displays and even RGB controllers to their phone. The SparkFun Blynk Board is specially designed to work with the ‘widgets’ within the Blynk mobile app to create your next IoT project. Monitor local weather conditions, control LEDs from your phone, even send a tweet when it’s time to water your plants! Every Blynk Board comes fully programmed and also includes a Blynk...

SparkFun Electric Imp Shield
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Price: $34.69
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Sparkfun Item #: DEV-12887 -

"If you aren’t familiar with the Electric Imp, it essentially provides an easy, integrated way to connect almost any hardware device both to other devices and to internet services. It’s more than just a WiFi card, or even a WiFi module with processing built in - it’s an integrated platform that deals with the drudgery of connectivity, allowing you to concentrate on the application instead of the mechanics. Of course, if you’re developing for it you’ll need a way...

SparkFun ESP32 Thing
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Price: $38.17
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Sparkfun Item #: DEV-13907 -

"The SparkFun ESP32 Thing is a comprehensive development platform for Espressif’s ESP32, their super-charged version of the popular ESP8266. Like the 8266, the ESP32 is a WiFi-compatible microcontroller, but to that it adds support for Bluetooth low-energy (i.e BLE, BT4.0, Bluetooth Smart), and nearly 30 I/O pins. The ESP32’s power and versatility will make it the foundation of IoT and connected projects for many years to come. Why the name? We lovingly call it the...

SparkFun ESP8266 Thing
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Price: $29.48
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Sparkfun Item #: WRL-13231 -

SparkFun ESP8266 ThingDescription: The SparkFun ESP8266 Thing is a breakout and development board for the ESP8266 WiFi SoC � a leading platform for Internet of Things (IoT) or WiFi-related projects. The Thing is low-cost and easy to use, and Arduino IDE integration can be achieved in just a few steps. We�ve made the ESP8266 easy to use by breaking out all of the module�s pins, adding a LiPo charger, power supply, and all of the other supporting circuitry it requires.Why the name? We lovingly...

SparkFun ESP8266 Thing - Dev Board
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Sparkfun Item #: WRL-13711 -

This is the SparkFun ESP8266 Thing Dev Board � a development board that has been solely design around the ESP8266, with an integrated FTDI USB-to-Serial chip. The ESP8266 is a cost-effective, and very capable WiFi-enabled microcontroller. Like any microcontroller, it can be programmed to blink LEDs, trigger relays, monitor sensors, or automate coffee makers, and with an integrated WiFi controller, the ESP8266 is a one-stop shop for almost any Internet-connected project. To top it all off, the...

SparkFun ESP8266 Thing - Dev Board (with Headers)
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Price: $31.22
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Sparkfun Item #: WRL-13804 -

"This is the SparkFun ESP8266 Thing Dev Board — a development board that has been solely designed around the ESP8266, with an integrated FTDI USB-to-Serial chip. The ESP8266 is a cost-effective and very capable WiFi-enabled microcontroller. Like any microcontroller, it can be programmed to blink LEDs, trigger relays, monitor sensors or automate coffee makers. With an integrated WiFi controller, the ESP8266 is a one-stop shop for almost any internet-connected project. To top it all off,...

SparkFun Inventors Kit for Photon
Price: $208.59
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Sparkfun Item #: KIT-13320 -

"The SparkFun Inventor’s Kit for Photon is a great way to get started in the fresh IoT world and WiFi development. The SparkFun Inventor’s Kit for Photon provides you not only with the Photon RedBoard but everything you need to hook up and experiment with multiple electronic circuits! With the Photon SIK you will be able to complete circuits that will teach you how to read sensors, drive motors, and more. The SparkFun Inventor’s Kit for Photon is the latest and greatest in...

SparkFun IoT Starter Kit with Blynk Board
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Price: $130.34
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Sparkfun Item #: KIT-13865 -

"Blynk is an easy to use app builder that allows users to add a variety of buttons, sliders, graphical displays and even RGB controllers to their phone. The SparkFun Blynk Board is specially designed to work with the ‘widgets’ within the Blynk mobile app to create your next IoT project. Monitor local weather conditions, control LEDs from your phone, even send a tweet when it’s time to water your plants! The SparkFun IoT Starter Kit with Blynk Board is a great way to gain a...

SparkFun Ludus Protoshield Wireless
Price: $43.39
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Sparkfun Item #: DEV-13295 -

"The SparkFun Ludus Protoshield Wireless is an Arduino compatible shield designed to make connecting motors and sensors to your Arduino-based development board as fast and easy as possible. This wireless Ludus is incredibly handy for throwing together remote control rovers and small autonomous robots. Simply attach this shield to your Arduino, attach an XBee, and you will be up and running in no time. The SparkFun Ludus Protoshield Wireless was developed by our Education department to help...

SparkFun nRF52832 Breakout
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Price: $34.69
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Sparkfun Item #: WRL-13990 -

"The nRF52832 is Nordic Semiconductor’s latest multiprotocol radio System on Chip (SoC). It’s half microcontroller, with a list of features including 32 configurable I/O pins, SPI, I2C, UART, PWM, ADC’s, 512kB flash, and 64kB RAM. And it’s half 2.4GHz multiprotocol radio, supporting Bluetooth Low Energy (BLE), ANT, and Nordic’s proprietary 2.4GHz ultra low-power wireless communication – it even features on-chip NFC tag support. SparkFun’s nRF52832...

SparkFun Photon RedBoard
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Price: $72.95
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Sparkfun Item #: DEV-13321 -

"The SparkFun Photon RedBoard, to put it simply, is a WiFi/Microcontroller development board in the Arduino form-factor for the Photon. It’s easy to use, it’s powerful, and it’s connected to the cloud. With the best support, potential, and performance the Photon RedBoard provides you with an IoT device with a powerful 120MHz ARM Cortex M3 and built-in WiFi connectivity. Imagine blowing up a Photon into the shape of an Arduino and while keeping its wireless and ARM Cortex M3...

SparkFun Qwiic Shield for Photon
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Price: $10.35
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Sparkfun Item #: DEV-14477 -

"The SparkFun Qwiic Shield for Photon is an easy-to-assemble board that provides a simple way to incorporate the Qwiic Connect System with your Particle Photon. This shield connects the I2C bus on your Photon to a series of SparkFun Qwiic connectors. As long as your devices are on different addresses, the Qwiic system allows for daisy chaining, meaning you can stack as many sensors as you’d like to create a tower of sensing power! The Qwiic Shield has four Qwiic connection ports, all on...

SparkFun Transceiver Breakout - nRF24L01+
Price: $36.43
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Sparkfun Item #: WRL-00691 -

"This module uses the newest 2.4GHz transceiver from Nordic Semiconductor, the nRF24L01+. This transceiver IC operates in the 2.4GHz band and has many new features! Take all the coolness of the nRF2401A and add some extra pipelines, buffers, and an auto-retransmit feature - very nice! Please note: We now populate these boards with the nRF24L01+. The ‘+’ version of the IC has improved range, sensitivity, and data rates. The command set is backward compatible with the original...

SparkFun Transceiver Breakout - nRF24L01+ (RP-SMA)
Price: $38.17
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Sparkfun Item #: WRL-00705 -

"The nRF24L01 module is the latest in RF modules from SparkFun. This module uses the 2.4GHz transceiver from Nordic Semiconductor, the nRF24L01+. This transceiver IC operates in the 2.4GHz band and has many new features! Take all the coolness of the nRF2401A and add some extra pipelines, buffers, and an auto-retransmit feature - very nice! This board features a reverse polarized SMA connector for maximum RF range. Please remember, you will need a mating RP-SMA 2.4GHz antenna (listed below)....

SparkFun WiFi Shield - ESP8266
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Price: $29.48
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Sparkfun Item #: WRL-13287 -

"The SparkFun ESP8266 WiFi Shield is an Arduino compatible shield for the ESP8266 WiFi SoC – a leading platform for Internet of Things (IoT) or WiFi-related projects. There are a variety of designs based around the ESP8266, including tiny, modular boards and more accessible development boards like our very own SparkFun ESP8266 Thing. The ESP8266 WiFi Shield finds a middle ground between the Module and the Thing that provides a great introduction to the ESP8266 – without leaving the...

SparkFun Wireless Joystick Kit
Price: $67.73
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Sparkfun Item #: KIT-14051 -

"The SparkFun Wireless Joystick Kit provides an easy way to control your next XBee project. Before the wireless joystick, radio-controlled projects used hobby RC transmitters, the same ones used for RC cars, boats and planes. The problem with these transmitters is that many aren’t customizable, and the ones that are tend to be too expensive for many of us. The Wireless Joystick Kit offers a custom wireless solution for those who want to control their project their own way. Equipped with...

SparkFun Wireless Motor Driver Shield
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Price: $46.87
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Sparkfun Item #: DEV-14285 -

"The SparkFun Wireless Motor Driver Shield is designed to make connecting motors, sensors and other components to your Arduino-based project as fast and easy as possible. The heart of the Wireless Motor Driver Shield is the Toshiba TB6612FNG H-Bridge Motor Driver, which allows the shield to control two DC motors at once, both CW and CCW, and to brake electronically. The TB6612FNG H-Bridge is rated up to 1.2A per channel at 13V, which means it will drive a fair variety of hobby motors ranging...

SparkFun XBee Explorer Dongle
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Price: $45.13
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Sparkfun Item #: WRL-11697 -

"This is the SparkFun XBee Explorer Dongle unit for the Digi XBee module line. With the XBee Explorer Dongle you can plug the unit directly into your USB port and have it act as a gateway between your computer and the XBee. No cables needed! This unit works with all XBee modules including the Series 1 and Series 2.5, standard and Pro version. The on-board voltage regulator is good up to 500mA. The highlight of this board is an FT231X USB-to-Serial converter. That’s what translates data...

SparkFun XBee Explorer Regulated
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Price: $19.04
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Sparkfun Item #: WRL-11373 -

"The SparkFun XBee Explorer Regulated takes care of the 3.3V regulation, signal conditioning, and basic activity indicators (Power, RSSI and DIN/DOUT activity LEDs). It translates the 5V serial signals to 3.3V so that you can connect a 5V (down to 3.3V) system to any XBee module. The board was conveniently designed to mate directly with the SparkFun Arduino Pro series of boards for wireless bootloading and USB based configuration. This unit works with all XBee modules including the Series 1...

SparkFun XBee Explorer Serial
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Price: $36.43
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Sparkfun Item #: WRL-13225 -

"The SparkFun XBee Explorer Serial is a simple to use, RS232 to serial base unit for the XBee line. This unit works with all XBee modules including the Series 1 and Series 2.5, standard and Pro version. Just plug the unit into the XBee Explorer, attach a RS232 cable, and you will have direct access to the serial and programming pins on the XBee unit. The board also supports DTR communication so you can reprogram and configure the XBee unit. XBee modules, RS232 cable, and power supplies can be...

SparkFun XBee Explorer USB
Price: $45.13
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Sparkfun Item #: WRL-11812 -

"This is a simple to use, USB to serial base unit for the Digi XBee line. This unit works with all XBee modules including the Series 1 and Series 2.5, standard and Pro version. Plug the unit into the XBee Explorer, attach a mini USB cable, and you will have direct access to the serial and programming pins on the XBee unit. The highlight of this board is an FT231X USB-to-Serial converter. That’s what translates data between your computer and the XBee. There’s also a reset button,...

SparkFun XBee Shield
Price: $27.74
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Sparkfun Item #: WRL-12847 -

"XBee radios are an awesome way to add wireless capability to your Arduino project and now it’s even easier with the SparkFun XBee Shield. The shield form-factor mates directly with any dev board that has an Arduino standard footprint and equips it with wireless communication capabilities using the popular XBee module. This unit works with all XBee modules including the Series 1 and 2, standard and Pro versions. The serial pins (DIN and DOUT) of the XBee are connected through an SPDT...

SparkFun XBee Wireless Kit
Price: $173.81
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Sparkfun Item #: KIT-13197 -

"This is the SparkFun XBee Wireless Kit, the perfect box full of goodies to get you started using XBees. Inside this kit you will find two XBee Modules, one XBee Explorer, one Xbee Shield and a set of R3 headers to solder onto the shield. Our entire goal for the XBee Kit was to make wireless communication simple. Connect one XBee to the shield and your Arduino, connect the other XBee to the Explorer board and your computer, and you’ll be able to seamlessly pass serial data to and from...

Teensy 3.1 XBee Adapter
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Price: $15.56
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Sparkfun Item #: BOB-13311 -

"The Teensy is an amazing development platform that allows you to get more computing power than an Arduino Uno, and in less space. The Teensy 3.1 XBee Adapter allows you to connect your Teensy with the tried and true XBee series to provide you with a great solution to any project that requires a decently ranged no-frills wireless serial link. Not only does the Teensy 3.1 XBee Adapter connect a XBee and Teensy together, it also acts as a breakout board for both. Each pin on the Teensy and XBee...

Telescopic Antenna SMA - 300 MHz to 1.1 GHz (ANT700)
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Price: $43.39
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Sparkfun Item #: WRL-13982 -

"This ANT700 is a telescopic antenna designed for operation from 300 MHz to 1.1 GHz with a total length that is configurable from 9.5 cm to 24.5 cm. Each ANT700 is constructed of stainless steel and features an SMA male connector, rotating shaft, and adjustable elbow. The ANT700 is a 50 Ohm antenna designed to match HackRF One. It is the perfect first antenna for general purpose use with HackRF One, but we won’t stop you from using it with different projects! Documents: Product Page " ...

Telescopic Antenna SMA - 75 MHz to 1 GHz (ANT500)
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Price: $54.69
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Sparkfun Item #: WRL-13002 -

"This ANT500 is a telescopic antenna designed for operation from 75 MHz to 1 GHz with a total length that is configurable from 20 cm to 88 cm long. Each ANT500 is constructed of stainless steel and features an SMA male connector, rotating shaft, and adjustable elbow. The ANT500 is a 50 ohm antenna designed to match HackRF One. It is the perfect first antenna for general purpose use with HackRF One but we won’t stop you from using it with different projects! Documents: Product Video " ...

Transceiver nRF2401A Module Trace Antenna
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Price: $23.96
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Sparkfun Item #: WRL-00153 -

Transceiver nRF2401A Module Trace AntennaDescription: Miniature RF (MiRF) 2.4GHz transceiver modules with built in antenna designed around the Nordic Semiconductor nRF2401A with high sensitivity and good range. These units are a SparkFun exclusive; small in stature, big on performance, all wrapped up in a user friendly package. Units come with an empty 0.1" spaced footprint ready for a straight header, right angle header (recommended), or your own wires/umbilical cable.The...

U.FL SMD Connector
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Price: $2.61
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Sparkfun Item #: WRL-09144 -

"Itty-bitty U.FL SMD connector. Great for tight PCB layouts that require antenna connections. Documents: Datasheet "

Ubertooth One
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Price: $219.02
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Sparkfun Item #: WRL-10573 -

"The Ubertooth One is an open source 2.4 GHz wireless development platform suitable for Bluetooth experimentation. Based on the powerful LPC175x ARM Cortex-M3 microcontroller with full-speed USB 2.0, the Ubertooth One is a great way to develop custom Class 1 comparable Bluetooth devices. The entire board is only****two and a half inches long with a USB-A connector at one end and an RP-SMA connector at the other. One thing that sets the Ubertooth apart from other Bluetooth development platforms...

UHF RFID Antenna (TNC)
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Price: $60.78
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Sparkfun Item #: WRL-14131 -

"This is your solution when you absolutely, positively need to get the most out of an antenna for your next RFID project. This ultra high-frequency (UHF) RFID Antenna boasts a frequency range of 860-960 MHz with a gain of 6dBi. This is the same external antenna we use for our Simultaneous RFID Reader due to its high-quality features. Each UHF RFID Antenna is terminated with a 30cm long TNC Female RP cable and also includes all the mounting gear you’ll need to attach it to any surface or...

WiFi Module - ESP8266
Price: $12.09
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Sparkfun Item #: WRL-13678 -

"The ESP8266 WiFi Module is a self contained SOC with integrated TCP/IP protocol stack that can give any microcontroller access to your WiFi network. The ESP8266 is capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor. Each ESP8266 module comes pre-programmed with an AT command set firmware, meaning, you can simply hook this up to your Arduino device and get about as much WiFi-ability as a WiFi Shield offers (and that’s...

WiFi SMD Module - CC3000
Price: $49.21
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Sparkfun Item #: WRL-12820 -

"The CC3000 from TI (Texas Instruments) is a self-contained wireless network processor that makes incorporating internet connectivity into your project simple. Instead of the more standard UART communication method, the CC3000 module utilizes an SPI interface allowing you, the user, to control the flow of data as you please. What makes the CC3000 unique is its ability to associate to a WiFi access point using a cell phone app in the Texas Instruments process called SmartConfig. This is a great...

WiFly RN-171 802-11b-g Serial Module - Roving Networks
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Price: $52.08
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Sparkfun Item #: WRL-11049 -

WiFly RN-171 802.11b/g Serial Module - Roving Networks Description: The RN-171 is a small form factor, ultra-low power embedded TCP/IP module. The RN-171 is a standalone, complete TCP/IP wireless networking module. Due to its small form factor and extremely low power consumption, it is perfect for mobile wireless applications such as asset monitoring, sensors, and portable battery operated devices. The module is pre-loaded with firmware to simplify integration and minimize...

Wireless SD Shield
Retail: $20.75
Price: $10.60
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Elecrow Item #: EL-MCS01109S -

The Wireless SD card shield allows an Arduino board to communicate wirelessly using a wireless module, and adds storage to your Arduino project. The XBee Shield is based on the Xbee modules from Digi, but can use any Bee module with the same footprint. It supports SD, SDHC, or MicroSD TF cards. Use the on-board toggle switch to select the SD card type. And when you want plug a sd card on it,you should select the switch to the right direction. About the wireless module, it only uses you two...