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

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

The Tuya ZSU module is a compact Zigbee module designed for integration into smart home devices. It features an EFR32MG21A020F1024IM32-B chipset and operates on a low voltage, making it ideal for battery-powered applications.

⚠️ NOTE: Ensure correct battery polarity when installing.

Quick Specs

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

🔧 Geek Corner (Flashing Info)

Chipset: EFR32MG21A020F1024IM32-B
Flashable: ❌ No
Info: Uses Silicon Labs EFR32MG21 chipset, typically locked down by manufacturer for specific Zigbee implementations. Not designed for custom firmware like Tasmota.

User Manual

Scanned pages from the official user manual:

ZSU Manual

External Photos

Photos of the device exterior:

ZSU Exterior

Internal Photos

Teardown photos showing the PCB and components:

ZSU PCB

Verdict

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

📄 Click to view full text manual (SEO)

ZSU Module Datasheet
Version: 20211111
Online Version
Contents
Contents
1 Product overview 2
1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Change history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Module interfaces 4
2.1 Dimensions and footprint . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Pin definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Electrical parameters 10
3.1 Absolute electrical parameters . . . . . . . . . . . . . . . . . . . . . 10
3.2 Normal working conditions . . . . . . . . . . . . . . . . . . . . . . . 10
3.3 TX and RX power consumption . . . . . . . . . . . . . . . . . . . . . 11
3.4 Working current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 RF parameters 13
4.1 Basic RF features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 TX performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 RX performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5 Antenna information 15
5.1 Antenna type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2 Antenna interference reduction . . . . . . . . . . . . . . . . . . . . . 15
6 Packaging information and production instructions 18
6.1 Mechanical dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.2 Side view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.3 The schematic diagram of footprint . . . . . . . . . . . . . . . . . . . 20
6.4 Production instructions . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.5 Recommended oven temperature curve . . . . . . . . . . . . . . . . . 22
6.6 Storage conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7 MOQ and packaging information 26
8 Appendix: Statement 27
I
Contents
ZSU is a Zigbee module that T uya has developed. It consists of a highly integrated
RF processing chip (EFR32MG21A020F1024IM32-B), a few peripherals, a built-in
802.15.4 PHY/MAC Zigbee network protocol stack and rich library functions.
1 / 29
1 Product overview
1 Product overview
ZSU is embedded with a low-power 32-bit ARM Cortex-M33 core, 1024-KB flash pro-
gram memory, 96-KB RAM and abundant peripheral resources. It integrates all func-
tion libraries of the Zigbee MAC and TCP/IP . Y ou can develop embedded Zigbee prod-
ucts as required.
1.1 Features
• Embedded ARM Cortex-M 33 processor having a low-power 32-bit CPU and hav-
ing DSP instructions and uping-point units, which can also function as an appli-
cation processor
• Clock rate: 80 MHz
• Wide operating voltage: 2.0 to 3.8 V
• Peripherals: 9 GPIOs, 1 UART, 2 ADCs, and 5 PWMs
• Zigbee connectivity
– Support 802.15.4 MAC/PHY
– Working channels 11 to 26 @2.400 to 2.483 GHz, air interface rate: 250
Kbps
– Up to +20dBm output power
– 60 uA/MHz power consumption during running; 5-uA sleep current
– PCB antenna inside
–...