ESP32-S, WiFi+Bluetooth Module Based on ESP32

SKU: 16612
Part Number: ESP32-S
Brand: Ai-Thinker




ESP32-S, WiFi+Bluetooth Module Based on ESP32, Built-in 32Mbit Flash, SMD38 Package


The ESP32-S is a wireless module based on ESP32, supports WiFi and Bluetooth 4.2, with built-in 32Mbit Flash, in the SMD38 package. There're also onboard PCB antenna and metal shield. In short, it's a small form factor and fairly high cost effective wireless module.

With the pre-flashed AT firmware, you can control the module through UART AT commands easily. The module integrates MCU inside, supports other developments like Lua/Micropython/Arduino to achieve flexible and fast prototyping, make it easy to integrate the module into IoT applications.


  • 802.11b/g/n Wi-Fi+BT SOC
  • Dual-core 32-bit CPU, 240 MHz frequency, computing capability up to 600DMIPS
  • Built-in two 12 bit SAR ADCs, up to 18 channels
  • SMD38 package
  • Supports OpenOCD debug interface
  • Supports multi sleep modes, deep sleep current as low as 6.5uA
  • UART baudrate up to 4Mbps
  • Embedded Lwip and FreeRTOS
  • Supports STA/AP/STA+AP operation mode
  • Supports Smart Config (APP) / AirKiss (WeChat), one key networking
  • Supports UART local firmware upgrade and/or remote firmware upgrade (FOTA)
  • AT commands for getting started fast
  • Supports secondary development, integrated Windows / Linux environment


The ESP32-S suit for IOT applications such as:

  • Smart home
  • Intelligent building
  • Industrial automation
  • Wearable devices
  • IP camera
  • Intelligent agriculture

Development Resources

Wiki :

Selection Guide

WIFI chip ESP8285 ESP8266 ESP32
Built-in Flash 8Mbit 32Mbit
Package SMD18 SMD22 SMD16 SMD38
Antenna External spring antenna Onboard PCB antenna
Frequency range 2.4G ~ 2.5G (2400M ~ 2483.5M)
WIFI protocol 802.11b/g/n WiFi
Bluetooth N/A Bluetooth 4.2 BR/EDR and BLE
Security WPA / WPA2
Encryption WEP / TKIP / AES
Firmware upgrade UART / OTA
Transmitting power 802.11b: 16 ±2dBm(@11Mbps)
802.11g: 14 ±2dBm(@54Mbps)
802.11n: 13 ±2dBm(@HT20,MCS7)
Receiving sensitivity CCK,1Mbps: -90 dBm
CCK,11Mbps: -85 dBm
6Mbps(1/2 BPSK): -88 dBm
54Mbps(3/4 64-QAM): -70 dBm
HT20,MCS7(65Mbps, 72.2Mbps): -67 dBm
Power Continuous Transmission: ~71mA (peak: 300mA)
Model Sleep: ~20mA
Light Sleep: ~2mA
Deep Sleep: ~20uA
Continuous Transmission: ~80mA (peak: 300mA)
Deep Sleep:~6.5uA
IO port 9 22
UART baudrate 300 ~ 4608000 bps (default 115200bps)
Power supply 3.0V ~ 3.6V (current > 500mA)  
Operating temp. -20 ℃ ~ 85 ℃
Storage condition -40 ℃ ~ 85 ℃, < 90%RH
Dimensions 10x11x2 (mm) 24x16x3 (mm) 25.5x18x3 (mm)

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Weight: 0.003 kg

Quick Overview

  1. ESP32-S x1