{"id":2000,"date":"2025-06-28T09:47:16","date_gmt":"2025-06-28T09:47:16","guid":{"rendered":"https:\/\/learnbydoing.dev\/?p=2000"},"modified":"2026-01-10T22:39:37","modified_gmt":"2026-01-10T22:39:37","slug":"how-to-use-an-nrf24l01-module-with-arduino","status":"publish","type":"post","link":"https:\/\/learnbydoing.dev\/how-to-use-an-nrf24l01-module-with-arduino\/","title":{"rendered":"How to Use an nRF24L01 Module with Arduino"},"content":{"rendered":"\t\t
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  • \n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\n\t\t\t\tArduino<\/span>, Electronics<\/span>, Tutorials<\/span>\t\t\t\t<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    In the world of robotics and IoT, wireless communication between devices is essential. One of the most affordable and efficient modules for transmitting data over a 2.4GHz radio frequency<\/strong> is the nRF24L01<\/strong>. In this tutorial, we\u2019ll explore how it works, the difference between its versions, and how to use it with Arduino<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \ud83d\udd0d What is the nRF24L01?<\/h3>\n

    The nRF24L01<\/strong> is a wireless transceiver module operating on the 2.4GHz ISM band<\/strong> (free and license-exempt). It can communicate with other nRF24 modules up to a distance of:<\/p>\n

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      100 meters<\/strong> in open space for the standard PCB antenna version<\/p>\n<\/li>\n

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      1 km or more<\/strong> with the external antenna PA+LNA version<\/strong><\/p>\n<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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      \ud83d\udce1 nRF24L01 With vs Without Antenna<\/h2>\n
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      \n\n\n\n\n\n\n
      Version<\/th>\nRange<\/th>\nStability<\/th>\nPower Consumption<\/th>\nCost<\/th>\n<\/tr>\n<\/thead>\n
      Without antenna (PCB)<\/strong><\/td>\nup to 100m<\/td>\nMedium<\/td>\nLow<\/td>\nAffordable<\/td>\n<\/tr>\n
      With external antenna (PA+LNA)<\/strong><\/td>\nup to 1000m<\/td>\nHigh<\/td>\nHigher<\/td>\nMore expensive<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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      \u00a0<\/div>\n<\/div>\n<\/div>\n<\/div>\n

      Recommendation:<\/strong>
      If your project involves obstacles or distances above 50-100m, it\u2019s better to use the external antenna version.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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      \ud83d\udcd1 How it Works<\/h3>\n

      The nRF24L01 uses the SPI protocol<\/strong> to communicate with Arduino. It can operate both as a transmitter<\/strong> and a receiver<\/strong>, allowing data exchange between two or more devices.<\/p>\n

      \ud83d\udcf6 Modes:<\/h4>\n
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        Transmitter (TX)<\/strong>: sends data to one or more receivers<\/p>\n<\/li>\n

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        Receiver (RX)<\/strong>: listens for incoming data from transmitters<\/p>\n<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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        \u00a0\ud83d\udcdd Required Components<\/h3>\n
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          2 x Arduino Uno<\/strong> (or compatible board)

          <\/p>\n<\/li>\n

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          2 x nRF24L01<\/strong>

          <\/p>\n<\/li>\n

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          Jumper wires

          <\/p>\n<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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          \ud83d\udd0c Wiring Diagram<\/h2>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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          \ud83d\udce6 Complete Arduino Code – Transmitter<\/strong><\/h3>\n

          Here\u2019s the code to send the data:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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          \n\t\t\t\t\n\t\t\t\t\t#include <SPI.h>\r\n#include <nRF24L01.h>\r\n#include <RF24.h>\r\n\r\nRF24 radio(9, 10); \/\/ CE, CSN\r\n\r\nconst byte address[6] = \"00001\";\r\n\r\nvoid setup() {\r\n  Serial.begin(9600);\r\n  radio.begin();\r\n  radio.openWritingPipe(address);\r\n  radio.setPALevel(RF24_PA_HIGH);\r\n  radio.stopListening();\r\n}\r\n\r\nvoid loop() {\r\n  const char text[] = \"Hello World\";\r\n  radio.write(&text, sizeof(text));\r\n  Serial.println(\"Message sent\");\r\n  delay(1000);\r\n}\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5949de1 elementor-widget elementor-widget-text-editor\" data-id=\"5949de1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3 data-start=\"1857\" data-end=\"1885\">\ud83d\udce6 <strong>Complete Arduino Code &#8211; Receiver<\/strong><\/h3>\n<p data-start=\"1922\" data-end=\"2017\">Here\u2019s the code to receive the data:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f766836 elementor-widget elementor-widget-code-highlight\" data-id=\"f766836\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-tomorrow copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-cpp line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-cpp\">\n\t\t\t\t\t<xmp>#include <SPI.h>\r\n#include <nRF24L01.h>\r\n#include <RF24.h>\r\n\r\nRF24 radio(9, 10); \/\/ CE, CSN\r\n\r\nconst byte address[6] = \"00001\";\r\n\r\nvoid setup() {\r\n  Serial.begin(9600);\r\n  radio.begin();\r\n  radio.openWritingPipe(address);\r\n  radio.setPALevel(RF24_PA_HIGH);\r\n  radio.stopListening();\r\n}\r\n\r\nvoid loop() {\r\n  const char text[] = \"Hello World\";\r\n  radio.write(&text, sizeof(text));\r\n  Serial.println(\"Message sent\");\r\n  delay(1000);\r\n}\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7a888ec elementor-widget elementor-widget-text-editor\" data-id=\"7a888ec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3><b>\ud83d\udd0e\u00a0<\/b><b>Breaking down the Code<\/b><\/h3><p>Let\u2019s review the code section by section:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1f12fa4 elementor-widget elementor-widget-text-editor\" data-id=\"1f12fa4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4>\ud83d\udce6<strong> Include Libraries<\/strong><\/h4><p>Includes the necessary libraries for SPI and nRF24 functionality.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fe67168 elementor-widget elementor-widget-code-highlight\" data-id=\"fe67168\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-tomorrow copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-cpp line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-cpp\">\n\t\t\t\t\t<xmp>#include <SPI.h>\r\n#include <nRF24L01.h>\r\n#include <RF24.h>\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-72a1341 elementor-widget elementor-widget-text-editor\" data-id=\"72a1341\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4>\ud83d\udce6<strong> Declare the radio object<\/strong><\/h4><p>Defines the CE and CSN pins used for communication.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ca87985 elementor-widget elementor-widget-code-highlight\" data-id=\"ca87985\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-tomorrow copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-cpp line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-cpp\">\n\t\t\t\t\t<xmp>RF24 radio(9, 10);\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2f5589e elementor-widget elementor-widget-text-editor\" data-id=\"2f5589e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4>\ud83d\udce6 <strong>Set the Address<\/strong><\/h4><p>Defines the CE and CSN pins used for communication.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c78b4c0 elementor-widget elementor-widget-code-highlight\" data-id=\"c78b4c0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-tomorrow copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-cpp line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-cpp\">\n\t\t\t\t\t<xmp>const byte address[6] = \"00001\";\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-28baf37 elementor-widget elementor-widget-text-editor\" data-id=\"28baf37\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"4263\" data-end=\"4387\">Sets a shared communication channel for both TX and RX modules. You can change this value to create independent connections.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b2907b3 elementor-widget elementor-widget-text-editor\" data-id=\"b2907b3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4>\ud83d\udce6 <strong>Transmitter Configuration<\/strong><\/h4>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ceb6e59 elementor-widget elementor-widget-code-highlight\" data-id=\"ceb6e59\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-tomorrow copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-cpp line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-cpp\">\n\t\t\t\t\t<xmp>radio.begin();\r\nradio.openWritingPipe(address);\r\nradio.setPALevel(RF24_PA_HIGH);\r\nradio.stopListening();<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-209dd21 elementor-widget elementor-widget-text-editor\" data-id=\"209dd21\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li data-start=\"4540\" data-end=\"4571\"><p data-start=\"4542\" data-end=\"4571\"><code data-start=\"4542\" data-end=\"4551\">begin()<\/code> starts the module<\/p><\/li><li data-start=\"4572\" data-end=\"4620\"><p data-start=\"4574\" data-end=\"4620\"><code data-start=\"4574\" data-end=\"4593\">openWritingPipe()<\/code> sets the sending channel<\/p><\/li><li data-start=\"4621\" data-end=\"4688\"><p data-start=\"4623\" data-end=\"4688\"><code data-start=\"4623\" data-end=\"4637\">setPALevel()<\/code> sets transmission power (LOW, MEDIUM, HIGH, MAX)<\/p><\/li><li data-start=\"4689\" data-end=\"4749\"><p data-start=\"4691\" data-end=\"4749\"><code data-start=\"4691\" data-end=\"4708\">stopListening()<\/code> configures the module as a transmitter<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4c4e824 elementor-widget elementor-widget-text-editor\" data-id=\"4c4e824\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4>\ud83d\udce6 <strong>Receiver Configuration<\/strong><\/h4>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3cb3f2f elementor-widget elementor-widget-code-highlight\" data-id=\"3cb3f2f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-tomorrow copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-cpp line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-cpp\">\n\t\t\t\t\t<xmp>radio.begin();\r\nradio.openReadingPipe(0, address);\r\nradio.setPALevel(RF24_PA_HIGH);\r\nradio.startListening();\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b326da0 elementor-widget elementor-widget-text-editor\" data-id=\"b326da0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li data-start=\"4903\" data-end=\"4954\"><p data-start=\"4905\" data-end=\"4954\"><code data-start=\"4905\" data-end=\"4924\">openReadingPipe()<\/code> opens the receiving channel<\/p><\/li><li data-start=\"4955\" data-end=\"5007\"><p data-start=\"4957\" data-end=\"5007\"><code data-start=\"4957\" data-end=\"4975\">startListening()<\/code> sets the module as a receiver<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0f7285a elementor-widget elementor-widget-text-editor\" data-id=\"0f7285a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4>\ud83d\udce6<strong> Sending and Receiving Data<\/strong><\/h4>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2fe6b45 elementor-widget elementor-widget-text-editor\" data-id=\"2fe6b45\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h5><strong>Transmitter:<\/strong><\/h5>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8048663 elementor-widget elementor-widget-code-highlight\" data-id=\"8048663\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-tomorrow copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-cpp line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-cpp\">\n\t\t\t\t\t<xmp>radio.write(&text, sizeof(text));\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-09a693e elementor-widget elementor-widget-text-editor\" data-id=\"09a693e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h5><strong>Receiver:<\/strong><\/h5>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-797e519 elementor-widget elementor-widget-code-highlight\" data-id=\"797e519\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-tomorrow copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-cpp line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-cpp\">\n\t\t\t\t\t<xmp>if (radio.available()) {\r\n  radio.read(&text, sizeof(text));\r\n}\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6760cfb elementor-widget elementor-widget-text-editor\" data-id=\"6760cfb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The transmitter sends data, while the receiver checks if data is available and reads it into a buffer.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>In the world of robotics and IoT, wireless communication between devices is essential. 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