Description �� ESP-01S ESP8266 WiFi Serial Transceiver Module – 2.4GHz Wireless UART – DC 3.0–3.6V | AuscomTech The ESP-01S ESP8266 WiFi Module is one of the most popular and reliable WiFi-UART transceiver modules for IoT, automation, smart home devices, and embedded projects.Compact, lightweight, and extremely cost-effective, it provides full 2.4GHz WiFi networking capability using simple serial (UART) commands — perfect for microcontrollers like Arduino, STM32, ESP32, Raspberry Pi, and more. This upgraded ESP-01S version offers improved stability, lower power consumption, and better compatibility than the original ESP-01. ⭐ Key Features �� 2.4GHz WiFi Connectivity Supports 802.11 b/g/n wireless networking with long-range communication (up to 400m in open space). �� UART Serial Interface Easily interface with microcontrollers using AT commands or custom firmware (ESP-AT, ESPHome, Tasmota, Arduino Core). ⚡ Low Voltage Operation Runs on 3.0–3.6V, making it ideal for battery-powered or low-power IoT applications. �� High Performance Powered by the ESP8266EX chip featuring: 32-bit Tensilica processor Up to 160MHz Integrated TCP/IP stack Onboard flash memory �� Flash Storage The ESP-01S typically includes 1MB (8Mbit) of flash memory, supporting OTA updates, firmware storage, and custom applications. �� Compact Size Small footprint makes it ideal for wearables, micro-projects, and tight enclosures. �� Community Support Large ecosystem of tutorials, libraries, firmware, and sample code.(Documentation available on request from AuscomTech.) �� Technical Specifications Specification Details Model ESP-01S Chipset ESP8266EX WiFi Standard 802.11 b/g/n (2.4GHz) Frequency 2.412 – 2.484 GHz Operating Voltage 3.0–3.6V DC Logic Level 3.3V (not 5V tolerant) Flash Memory 1MB (8Mbit) Interface UART (TX/RX) Baud Rate Default 115200 Antenna PCB onboard antenna Range Up to 400m line-of-sight Dimensions 24 × 14 × 10 mm Weight ~5g Colour Black PCB �� Compatible With Arduino (Uno, Mega, Nano — with 3.3V level shifting) ESPHome & Home Assistant (via UART bridge or automation firmware) Raspberry Pi (GPIO serial) STM32, ESP32, RP2040, PIC microcontrollers Tasmota / ESP-AT custom firmware IoT sensors, relays, switches, automation controllers �� Typical Applications WiFi enablement for Arduino projects Remote monitoring & IoT sensor nodes Smart switches & relays Serial-to-WiFi bridges Home Assistant integration MQTT/HTTP control systems DIY wireless devices Robotics & remote telemetry �� Package Includes 1 × ESP-01S ESP8266 WiFi Serial Module (Black)
