ZS3L Reset & Teardown (FCC ID 2ANDL-ZS3L)

Before you buy the Tuya Global ZS3L, check what's inside.

The Tuya ZS3L is a low-power embedded Zigbee module designed for smart home applications. It features an Arm Cortex-M33 processor and is suitable for integration into various intelligent devices.

⚠️ NOTE: Ensure correct battery polarity when installing. This module operates at low voltage and is not intended for direct connection to mains power.

Quick Specs

Manufacturer: Tuya Global
Model: ZS3L
Protocol: Zigbee
Chipset: Beken Zigbee
Ecosystem: Tuya / Smart Life
App: Smart Life

🔧 Geek Corner (Flashing Info)

Chipset: EFR32MG21A020F768IM32-B
Flashable: ❌ No
Info: The module is designed for Zigbee communication only and does not appear to support custom firmware flashing like Tasmota or ESPHome.

User Manual

Scanned pages from the official user manual:

ZS3L Manual

External Photos

Photos of the device exterior:

ZS3L Exterior

Internal Photos

Teardown photos showing the PCB and components:

ZS3L PCB

Verdict

The ZS3L is a Zigbee device from the Tuya / Smart Life ecosystem.

📄 Click to view full text manual (SEO)

Hangzhou Tuya Information Technology Co., Ltd. 1 V1.0.1 

1. Product Overview 
ZS3L is a low-power embedded Zigbee module that Tuya has developed. It consists of a 
highly integrated RF processor chip (EFR32MG21A020F768IM32-B) and several 
peripheral components, with an embedded 802.15.4 PHY/MAC Zigbee network protocol 
stack and robust library functions. ZS3L is embedded with a 32-bit low-power Arm 
Cortex-M33 core, 768 KB flash memory, and 64 KB random-access memory (RAM), and 
has extensive peripherals. 
ZS3L is a FreeRTOS platform that integrates all the function libraries of the Zigbee MAC 
and TCP/IP protocols. You can develop embedded Zigbee products as required. 
1.1 Features 
 Embedded low-power 32-bit Arm Cortex-M33 processor, which provides digital signal 
processor (DSP) instructions and floating-point units (FPUs) and can also function as 
an application processor 
⚫ Clock rate: 80 MHz 
 Peripherals: nine GPIOs, one universal asynchronous receiver/transmitter (UART), 
and one analog-to-digital converter (ADC) 
 White ink, black silkscreen; mounted onto a PCB by using an SMT placement 
machine or through-hole mounted onto the PCB through a pin header 
 Zigbee features 
 Working voltage: 2.0 V to 3.8 V 
⚫ 802.15.4 MAC/PHY 
⚫ Channels 11 to 26 at 2.400 GHz to 2.483 GHz, 250 kbit/s air interface rate 
⚫ Maximum output power: +20 dBm; dynamic output power: > 35 dB 
⚫ Runtime power consumption: 60 µA/MHz; current in sleep mode: 5 µA 
⚫ Proactive device pairing for terminals 
Tuya ZS3L Zigbee Module 
Version: 1.0.1 
 Date: 2019-12-18 
 No.: TY-Zigbee-DS022 
Global Intelligent Platform 
Product 
Manual 
 ZS3L Datasheet 
Hangzhou Tuya Information Technology Co., Ltd. 2 V1.0.1 
⚫ Onboard PCB antenna 
⚫ Working temperature: –20°C to +105°C 
⚫ AES-128 or AES-256 hardware encryption 
1.2 Application Scenarios 
 Intelligent building 
 Smart household and home appliances 
 Smart socket and light 
 Industrial wireless control 
 Baby monitor 
 Network camera 
 Intelligent bus 
 ZS3L Datasheet 
Hangzhou Tuya Information Technology Co., Ltd. 3 V1.0.1 
Change History 
No. Date Change Description Version After 
Change 
1 2019-12-10 This is the first release. 1.0.0 
1 2019-12-18 Updated pin 3 description and antenna gain. 1.0.1 

 ZS3L Datasheet 
Hangzhou Tuya Information Technology Co., Ltd. 4 V1.0.1 
Contents 
1. Product Overview ............................................................................................................ 1 
1.1 Features .................................................................................................................. 1 
1.2 Application Scenarios ............................................................................................. 2 
2. Module Interfaces ............................................................................................................ 6 
2.1 Dimensions and Footprint ...................................................................................... 6 
2.2 Interface Pin...