ESP32A1S Reset & Teardown (FCC ID 2AHMR-ESP32A1S)
Factory reset and internal photos for Tuya OEM ESP32A1S. Tuya / Smart Life smart plug.
January 15, 2026
•
1 min read
Before you buy the Tuya OEM ESP32A1S, check what's inside.
This is the ESP32-A1S, a versatile Wi-Fi and Bluetooth System-on-Chip (SoC) module designed by Ai-Thinker for integration into various IoT devices. It is commonly used as a core component in smart home products, audio devices, and other embedded systems requiring wireless connectivity.
⚠️ NOTE: Ensure correct power supply voltage (3.3V) and polarity when integrating this module. Handle with ESD precautions.
Quick Specs
- Manufacturer: Tuya OEM
- Model: ESP32A1S
- Protocol: WiFi
- Chipset: ESP32
- Ecosystem: Tuya / Smart Life
- App: Smart Life
🔧 Geek Corner (Flashing Info)
- Chipset: ESP32-A1S
- Flashable: ✅ Yes
- Info: The ESP32-A1S is based on the ESP32 chipset, which is well-supported for custom firmware like Tasmota and ESPHome.
User Manual
Scanned pages from the official user manual:
External Photos
Photos of the device exterior:
Internal Photos
Teardown photos showing the PCB and components:
Verdict
The ESP32A1S is a WiFi device from the Tuya / Smart Life ecosystem.
📄 Click to view full text manual (SEO)
ESP32-A1S Wi-Fi+BT SoC Module V1.0
Copyright © 2017 Shenzhen Ai-Thinker Technology Co., Ltd All Rights Reserved Page 1 of 6
ESP32-A1S Module
Overview
ESP32-A1S is an ultra-small, powerful
module. Built-in advanced low-power dual-core
32-bit CPU and Codec ES8388 audio decoding
chip, can be widely used in various IoT
applications, suitable for home smart devices,
smart Audio, story machine solutions, etc., are the
ideal solution for IoT applications.
ESP32-A1S internal circuit is highly
integrated, supports a variety of peripherals, can
support secondary development, and quickly
realize product differentiation.
ESP32-A1S adopts SMD package to realize
rapid production of products and provide
customers with high-reliability connection mode.
It is especially suitable for modern, large-scale,
low-cost production methods, and is convenient
for various IoT hardware terminal applications.
Features
-
-
-
-
-
-
-
-
-
The smallest 802.11b/g/n Wi-Fi BT SoC Module
Low power 32-bit CPU,can also serve the
application processor
Built-in ES8388 Codec audio decoding chip, can
support playing music and recording
Built-in 520 KB SRAM, external 4MPSRAM
Supports UART/SPI/I2C/PWM/ADC/DAC
Support for firmware upgrade (FOTA)
Antenna supports on-board antenna or IPEX
block output
S upports a variety of mainstream compression
a nd lossless audio formats, including M4A,
AA C, FLAC, OGG, OPUS, MP3, WAV, etc.
S upports audio input methods such as MIC and
L ine-in.
ESP32-A1S Wi-Fi+BT SoC Module V1.0
Copyright © 2017 Shenzhen Ai-Thinker Technology Co., Ltd All Rights Reserved Page 2 of 6
Module Model ESP32-A1S
Package SMD-38
Size 32mm*19mm*3mm
SPI Flash Default 32Mbit
RAM 520KB SRAM +4M PSRAM
Bluetooth Bluetooth 4.2 BR/EDR and BLE standards, support A2DP, AVRC
protocol, etc.
Wi-Fi 802.11 b/g/n/e/i， Support DLNA protocol
Audio Output Support 1 channel headphone output and 1 channel left and right
speaker output
Audio Input Support LINEIN and 2-way MIC input
Custom IO port 14
UART Baudrate Default 115200 bps
Audio Format MP3、WAV、M4A、AAC、FLAC、OGG、OPUS
Antenna Onboard PCB antenna and antenna carrier
Transmit Power
802.11b: 17± 2 dBm (@11Mbps)
802.11g: 14± 2 dBm (@54Mbps)
802.11n: 13± 2 dBm (@MCS7)
Receiving Sensitivity
CCK, 1 Mbps : -90dBm
CCK, 11 Mbps: -85dBm
6 Mbps (1/2 BPSK): -88dBm
54 Mbps (3/4 64-QAM): -70dBm
MCS7 (65 Mbps, 72.2 Mbps): -67dBm
Power Dissipation 350mA
Security WPA/WPA2/WPA2-Enterprise/WPS
Power Supply Range 3.3V±0.3V
Operating Temperature - 0 ℃ ~ 85 ℃
Storage Environment -40 ℃ ℃ , < 90%RH
Weight 2.5± 0.05g
Product Specifications
4
~ 125
ESP32-A1S Wi-Fi+BT SoC Module V1.0
Copyright © 2017 Shenzhen Ai-Thinker Technology Co., Ltd All Rights Reserved Page 3 of 6
GPIO Features Types Remarks
TXD0 GPIO1/CLKOUT2 I/O
Download serial port
RXD0 GPIO3/CLKOUT3 I/O
EN I Reset function
IO21 U0CTS/VSPIQ I/O
IO22 U0RTS/VSPIWP I/O
IO19 VSQIQ/U0CTS I/O
IO23 VSPIIDHS1STROBE I/O
IO18 VSPICLK/HS1DATA7 I/O
IO5 V...