{"product_id":"esp8266-wifi-module-esp-12e-esp-12f-esp12s-802-11-arduino-iot","title":"ESP8266 WiFi Module — ESP-12E \/ ESP-12F \/ ESP12S, 802.11 b\/g\/n, Arduino \u0026 IoT","description":"\u003ch2\u003eESP8266 WiFi Module — ESP-12E \/ ESP-12F \/ ESP12S, 802.11 b\/g\/n, Arduino \u0026amp; IoT\u003c\/h2\u003e\u003cp\u003eThe ESP-12E, ESP-12F, and ESP12S are compact SMD WiFi modules built around the Espressif ESP8266EX SoC, providing 802.11 b\/g\/n WiFi connectivity with an integrated TCP\/IP stack, GPIO, ADC, SPI, I²C, and UART. With 4MB flash (ESP-12F\/ESP12S) and a PCB trace antenna, they are the core module used in NodeMCU, Wemos D1 Mini, and countless custom IoT designs. Programmable via Arduino IDE, MicroPython, or AT commands.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoC\u003c\/td\u003e\n\u003ctd\u003eEspressif ESP8266EX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiFi Standard\u003c\/td\u003e\n\u003ctd\u003e802.11 b\/g\/n, 2.4GHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlash Memory\u003c\/td\u003e\n\u003ctd\u003e1MB (ESP-12E) \/ 4MB (ESP-12F, ESP12S)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGPIO Pins\u003c\/td\u003e\n\u003ctd\u003e11 (ESP-12E\/F) \/ 9 (ESP12S)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eADC\u003c\/td\u003e\n\u003ctd\u003e1× 10-bit (0–1V input range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterfaces\u003c\/td\u003e\n\u003ctd\u003eUART, SPI, I²C, PWM, I²S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e3.0V – 3.6V (3.3V nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Current\u003c\/td\u003e\n\u003ctd\u003e~300mA (WiFi TX)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAntenna\u003c\/td\u003e\n\u003ctd\u003ePCB trace antenna (onboard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin Pitch\u003c\/td\u003e\n\u003ctd\u003e2mm (castellated pads)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eESP-12E vs ESP-12F vs ESP12S\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eESP-12E\u003c\/th\u003e\n\u003cth\u003eESP-12F\u003c\/th\u003e\n\u003cth\u003eESP12S\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlash\u003c\/td\u003e\n\u003ctd\u003e1MB\u003c\/td\u003e\n\u003ctd\u003e4MB\u003c\/td\u003e\n\u003ctd\u003e4MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGPIO count\u003c\/td\u003e\n\u003ctd\u003e11\u003c\/td\u003e\n\u003ctd\u003e11\u003c\/td\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAntenna\u003c\/td\u003e\n\u003ctd\u003ePCB trace\u003c\/td\u003e\n\u003ctd\u003eImproved PCB trace\u003c\/td\u003e\n\u003ctd\u003ePCB trace\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRF performance\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eBetter (−1dB improvement)\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eBasic IoT, AT command use\u003c\/td\u003e\n\u003ctd\u003eOTA updates, larger sketches\u003c\/td\u003e\n\u003ctd\u003eCompact designs, fewer GPIOs needed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhy Choose ESP-12E\/F\/ESP12S?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4MB flash (ESP-12F\/ESP12S)\u003c\/strong\u003e — sufficient for OTA firmware updates and large Arduino sketches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Arduino IDE support\u003c\/strong\u003e — program with familiar Arduino syntax using ESP8266 board package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated TCP\/IP stack\u003c\/strong\u003e — no external WiFi chip needed, handles HTTP, MQTT, WebSocket natively\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e11 GPIO pins\u003c\/strong\u003e — enough for most IoT sensor and actuator applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2mm castellated pads\u003c\/strong\u003e — can be soldered directly to custom PCBs or used with 2mm-to-2.54mm adapter\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible With\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eArduino IDE\u003c\/strong\u003e: ESP8266 board package (Board Manager URL: http:\/\/arduino.esp8266.com\/stable\/package_esp8266com_index.json)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicroPython\u003c\/strong\u003e: Official ESP8266 MicroPython firmware (esptool.py flash)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNodeMCU Lua\u003c\/strong\u003e: NodeMCU firmware with Lua scripting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAT Commands\u003c\/strong\u003e: Default Espressif AT firmware for modem-style WiFi control from external MCU\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHome Assistant \/ ESPHome\u003c\/strong\u003e: ESPHome firmware for direct smart home integration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgrammer\u003c\/strong\u003e: USB-to-UART adapter (CH340G, CP2102) + esptool.py\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: How do I program ESP-12E\/F with Arduino IDE?\u003c\/strong\u003e\u003cbr\u003eA: (1) Install ESP8266 board package in Arduino IDE. (2) Connect GPIO0 to GND (flash mode), GPIO15 to GND, GPIO2 to VCC. (3) Connect UART TX\/RX to CH340 or CP2102 adapter. (4) Power with stable 3.3V\/500mA supply. (5) Upload sketch. (6) Disconnect GPIO0 from GND and reset for normal boot. Use a NodeMCU or Wemos D1 Mini board for easier programming without manual GPIO wiring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What power supply do I need for ESP-12F?\u003c\/strong\u003e\u003cbr\u003eA: ESP8266 requires 3.3V with up to 300mA peak current during WiFi transmission. Use a dedicated 3.3V\/500mA LDO (AMS1117-3.3, LD1117-3.3) or a switching regulator. Do not power from Arduino’s 3.3V pin — it is typically limited to 50–150mA and will cause brownout resets during WiFi TX.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What is the difference between ESP-12F and NodeMCU?\u003c\/strong\u003e\u003cbr\u003eA: ESP-12F is the bare WiFi module with 2mm castellated pads — requires external USB-UART, 3.3V regulator, and boot mode resistors for programming. NodeMCU is a development board that integrates ESP-12E\/F with a CH340 USB-UART, 3.3V regulator, and all boot resistors, making it plug-and-play for USB programming. Use ESP-12F for custom PCB designs; use NodeMCU for prototyping.\u003c\/p\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e1× ESP8266 WiFi Module (ESP-12E \/ ESP-12F \/ ESP12S — variant as selected)\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"ESP12E","offer_id":46991464136939,"sku":"14:1202#ESP12E","price":7.4,"currency_code":"USD","in_stock":true},{"title":"ESP12F","offer_id":46991464169707,"sku":"14:350852#ESP12F","price":7.4,"currency_code":"USD","in_stock":true},{"title":"ESP12S","offer_id":46991464202475,"sku":"14:351074#ESP12S","price":7.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/esp8266-serial-wifi-module-esp12e-12f-12s-remote-control.webp?v=1761720750","url":"https:\/\/keszoox.com\/products\/esp8266-wifi-module-esp-12e-esp-12f-esp12s-802-11-arduino-iot","provider":"Keszoox","version":"1.0","type":"link"}