{"product_id":"parallax-32420s-32420d-wx-esp8266-wifi-module","title":"Parallax 32420S \/ 32420D WX ESP8266 WiFi Module","description":"\u003cmeta name=\"description\" content=\"Buy Parallax 32420S \/ 32420D WX ESP8266 WiFi Module online in India at best price from The Engineer Store, Bengaluru. Authentic product, 7-day warranty on manufacturing defects, fast delivery across India.\"\u003e\n\n\u003ch1\u003eParallax 32420S \/ 32420D WX ESP8266 WiFi Module\u003c\/h1\u003e\n\n\u003cp\u003eThe Parallax 32420S \/ 32420D WX ESP8266 WiFi Module is a compact, low-power wireless connectivity solution based on the industry-standard ESP8266 chipset, enabling IoT device developers to add robust WiFi capabilities to embedded systems. Electronics engineers and IoT developers use this module to rapidly prototype connected devices, smart home applications, and remote monitoring systems without complex wireless protocol implementation. This module solves the critical challenge of integrating reliable WiFi connectivity into resource-constrained microcontroller projects while maintaining minimal power consumption and cost overhead.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\n\u003cp\u003eThe Parallax 32420S \/ 32420D WX ESP8266 WiFi Module operates as a standalone microcontroller with integrated WiFi transceiver, eliminating the need for separate wireless shields. Built on the Tensilica L106 32-bit processor running at 80 MHz, the module features 160 KB of RAM and 4 MB of flash memory, supporting both Station and Access Point modes. The device communicates via UART interface at configurable baud rates, allowing seamless integration with Arduino, Propeller, and other microcontroller platforms through AT command set or direct firmware programming using the Arduino IDE.\u003c\/p\u003e\n\n\u003cp\u003eThe WX variant specifically includes enhanced antenna design and improved RF performance characteristics, delivering superior range and signal stability compared to standard ESP8266 modules. Operating at 3.3V with integrated voltage regulation, the module draws minimal current during WiFi operation, making it ideal for battery-powered IoT applications. Support for WPA2 encryption, SSL\/TLS protocols, and multiple concurrent TCP\/UDP connections ensures enterprise-grade security and reliability for professional IoT deployments.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecification\u003c\/td\u003e\n\u003ctd\u003eDetails\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eWiFi Microcontroller Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eParallax\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e32420S \/ 32420D WX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eOriginal \/ Authentic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e7 days on manufacturing defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping\u003c\/td\u003e\n\u003ctd\u003e1-5 days from Bengaluru\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003e7-8 days across India\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupport\u003c\/td\u003e\n\u003ctd\u003e24\/7 via Email and WhatsApp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcessor\u003c\/td\u003e\n\u003ctd\u003eTensilica L106 32-bit @ 80 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRAM\u003c\/td\u003e\n\u003ctd\u003e160 KB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlash Memory\u003c\/td\u003e\n\u003ctd\u003e4 MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiFi Standard\u003c\/td\u003e\n\u003ctd\u003e802.11 b\/g\/n (2.4 GHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eUART \/ SPI \/ I2C \/ GPIO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecurity\u003c\/td\u003e\n\u003ctd\u003eWPA2 \/ WPA \/ WEP encryption\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e80 mA typical WiFi transmission, 10 uA standby\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 125 degrees Celsius\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eIntegrated WiFi Transceiver: Complete 802.11 b\/g\/n WiFi stack eliminates external wireless modules, reducing PCB footprint and component count for compact IoT designs\u003c\/li\u003e\n\u003cli\u003eDual Operating Modes: Configurable Station and Access Point modes enable the module to connect to existing WiFi networks or create its own hotspot for direct device communication\u003c\/li\u003e\n\u003cli\u003eLow Power Architecture: Sleep modes consuming as little as 10 microamps enable battery-powered applications with extended runtime on standard lithium-ion cells\u003c\/li\u003e\n\u003cli\u003eEnhanced WX Antenna Design: Optimized RF front-end with improved impedance matching delivers 15-20 dB better signal strength and extended range compared to standard ESP8266 variants\u003c\/li\u003e\n\u003cli\u003eMultiple Protocol Support: Native support for TCP, UDP, HTTP, and MQTT protocols enables seamless integration with cloud platforms and IoT middleware\u003c\/li\u003e\n\u003cli\u003eProgrammable via Arduino IDE: Compatible with Arduino development environment, allowing rapid prototyping using familiar C++ syntax and extensive library ecosystem\u003c\/li\u003e\n\u003cli\u003eGPIO Expansion: 11 programmable GPIO pins with PWM, ADC, and interrupt capabilities enable direct sensor interfacing and peripheral control\u003c\/li\u003e\n\u003cli\u003eSecure Communication: Built-in SSL\/TLS support with certificate validation ensures encrypted data transmission for sensitive IoT applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eApplications and Use Cases\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eSmart Home Automation: Control lighting, temperature, and appliances remotely via WiFi-enabled switches and relay modules, integrating with platforms like Home Assistant and OpenHAB\u003c\/li\u003e\n\u003cli\u003eEnvironmental Monitoring: Deploy wireless sensor networks for temperature, humidity, and air quality monitoring with real-time cloud data logging and alert systems\u003c\/li\u003e\n\u003cli\u003eRemote Equipment Monitoring: Monitor industrial machinery, power consumption, and equipment status through WiFi-connected data acquisition modules with predictive maintenance capabilities\u003c\/li\u003e\n\u003cli\u003eWearable IoT Devices: Integrate WiFi connectivity into portable health monitoring devices, fitness trackers, and personal safety systems with minimal power overhead\u003c\/li\u003e\n\u003cli\u003eAgricultural IoT Solutions: Monitor soil moisture, weather conditions, and crop health across distributed farm locations with cellular-to-WiFi gateway integration\u003c\/li\u003e\n\u003cli\u003eBuilding Access Control: Implement WiFi-enabled smart locks, occupancy sensors, and visitor management systems for modern facility management\u003c\/li\u003e\n\u003cli\u003ePrototype Development: Rapid IoT prototyping platform for students, makers, and professional engineers developing proof-of-concept wireless applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to Use\u003c\/h2\u003e\n\n\u003cp\u003eTo begin using the Parallax 32420S \/ 32420D WX ESP8266 WiFi Module, establish UART communication at 115200 baud rate between the module and your host microcontroller, ensuring proper 3.3V logic level conversion if connecting to 5V systems. Send AT commands to configure the module's WiFi parameters: AT+CWMODE to set Station or Access Point mode, AT+CWJAP to join a network with SSID and password, and AT+CIFSR to retrieve the assigned IP address. For Arduino IDE programming, install the ESP8266 board package through the Board Manager, select the appropriate board variant, and upload sketches directly to the module's flash memory, eliminating the need for AT command sequences.\u003c\/p\u003e\n\n\u003cp\u003eConnect GPIO pins to sensors, switches, and relay modules according to your application requirements, utilizing the built-in ADC for analog sensor inputs and PWM outputs for motor control. Implement WiFi connectivity through the Arduino WiFi library, establishing TCP or UDP sockets to transmit sensor data to cloud platforms like ThingSpeak, Blynk, or custom MQTT brokers. Configure sleep modes using the sleep function to minimize power consumption during inactive periods, critical for battery-powered deployments. Always validate SSL certificates when connecting to HTTPS endpoints, and implement robust error handling for WiFi disconnection scenarios to ensure reliable operation in varying network conditions.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between the 32420S and 32420D variants?\u003c\/summary\u003e\n\u003cp\u003eThe 32420S features a standard PCB antenna configuration suitable for typical indoor IoT applications with moderate range requirements. The 32420D includes an external antenna connector allowing users to attach high-gain external antennas for extended range in challenging RF environments. Both variants use identical ESP8266 chipsets and firmware, with the primary difference being antenna flexibility and RF performance characteristics.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this module with 5V microcontrollers like Arduino Uno?\u003c\/summary\u003e\n\u003cp\u003eThe ESP8266 module operates strictly at 3.3V logic levels. Direct connection to 5V systems will damage the module. You must implement level shifting using voltage dividers on RX pin or dedicated level shifter ICs for bidirectional communication. Alternatively, power the module from a 3.3V regulator while maintaining proper logic level conversion on all signal lines.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the maximum WiFi range of this module?\u003c\/summary\u003e\n\u003cp\u003eThe WX variant achieves approximately 100-150 meters in open space and 50-80 meters through typical building walls, depending on antenna type and RF environment. External antenna variants extend range significantly. Range varies with WiFi router power, channel congestion, and physical obstacles. For extended range applications, use high-gain external antennas with the 32420D variant.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eDoes this module support cloud connectivity and MQTT?\u003c\/summary\u003e\n\u003cp\u003eYes, the module natively supports MQTT protocol through the PubSubClient library in Arduino IDE. You can publish sensor data and subscribe to control topics on any MQTT broker including AWS IoT Core, Azure IoT Hub, and open-source brokers like Mosquitto. SSL\/TLS encryption ensures secure communication with cloud platforms.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the power consumption during WiFi transmission?\u003c\/summary\u003e\n\u003cp\u003eThe module draws approximately 80-160 mA during active WiFi transmission depending on transmission power level and data rate. In idle connected state, consumption drops to 15-40 mA. Sleep modes reduce consumption to 10 microamps, enabling multi-year battery operation for low-duty-cycle applications like environmental sensors reporting data every few hours.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan I program the module using the Arduino IDE?\u003c\/summary\u003e\n\u003cp\u003eYes, the ESP8266 is fully Arduino-compatible. Install the ESP8266 board package from the Arduino Board Manager, select the appropriate board variant, and upload sketches directly using the standard Arduino IDE workflow. The module includes a built-in USB-to-UART converter on development boards, though the bare module requires external serial interface.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhen will I receive my order?\u003c\/summary\u003e\n\u003cp\u003eOrders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is your return and warranty policy?\u003c\/summary\u003e\n\u003cp\u003eWe offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eAre bulk discounts available?\u003c\/summary\u003e\n\u003cp\u003eYes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eWhy Buy from The Engineer Store\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eGenuine Products: Sourced directly from authorized distributors with authentication\u003c\/li\u003e\n\u003cli\u003eExpert Team: Our technical team validates every product before listing\u003c\/li\u003e\n\u003cli\u003eFast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse\u003c\/li\u003e\n\u003cli\u003ePan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata\u003c\/li\u003e\n\u003cli\u003ePayment Options: COD, UPI, credit\/debit cards, net banking, EMI available\u003c\/li\u003e\n\u003cli\u003eTechnical Support: 24\/7 expert guidance via email and WhatsApp\u003c\/li\u003e\n\u003cli\u003eReturns: 7-day return policy on manufacturing defects only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eBuy Parallax 32420S \/ 32420D WX ESP8266 WiFi Module Online in India\u003c\/h2\u003e\n\n\u003cp\u003ePurchase the\u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":43853742506147,"sku":"TES-EV02259","price":3450.3,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/4479\/7091\/products\/32420S-228x228.jpg?v=1704191028","url":"https:\/\/www.theengineerstore.in\/products\/parallax-32420s-32420d-wx-esp8266-wifi-module","provider":"The Engineer Store","version":"1.0","type":"link"}