CB3S Reset & Teardown (FCC ID 2ANDL-CB3S)
Factory reset and internal photos for Tuya Global CB3S. Tuya / Smart Life smart plug.
January 15, 2026
•
1 min read
Before you buy the Tuya Global CB3S, check what's inside.
The Tuya CB3S is a low-power Wi-Fi module featuring a BK7231N chip, suitable for embedded applications requiring Wi-Fi connectivity and basic control functions. It supports both Wi-Fi and Bluetooth LE and is designed for integration into smart home devices.
⚠️ NOTE: Ensure correct voltage is supplied (3.0-3.6V) and observe polarity if using batteries.
Quick Specs
- Manufacturer: Tuya Global
- Model: CB3S
- Protocol: WiFi, Bluetooth
- Chipset: Beken BK7231N
- Ecosystem: Tuya / Smart Life
- App: Smart Life
🔧 Geek Corner (Flashing Info)
- Chipset: BK7231N
- Flashable: ✅ Yes
- Info: The CB3S module uses the BK7231N chipset, which is known to be flashable with alternative firmware like OpenBeken/LibreTiny.
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 CB3S is a WiFi device from the Tuya / Smart Life ecosystem.
📄 Click to view full text manual (SEO)
CB3S Module Datasheet
Version: 20210506
Online Version
Contents
Contents
1 Product overview 2
1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Change history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Module interfaces 3
2.1 Dimensions and package . . . . . . . . . . . . . . . . . . . . . . . . 3
3 Electrical parameters 8
3.1 Absolute electrical parameters . . . . . . . . . . . . . . . . . . . . . 8
3.2 Normal working conditions . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 RF power consumption . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.4 Working current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 RF parameters 11
4.1 Basic RF features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Wi-Fi transmission performance . . . . . . . . . . . . . . . . . . . . . 11
4.3 Wi-Fi receiving performance . . . . . . . . . . . . . . . . . . . . . . . 12
4.4 Bluetooth transmission performance . . . . . . . . . . . . . . . . . . 13
4.5 Bluetooth receiving performance . . . . . . . . . . . . . . . . . . . . 13
5 Antenna information 13
5.1 Antenna type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2 Antenna interference reduction . . . . . . . . . . . . . . . . . . . . . 14
6 Packaging information and production instructions 17
6.1 Mechanical dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.2 Production instructions . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.3 Recommended oven temperature curve . . . . . . . . . . . . . . . . . 22
6.4 Storage conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7 MOQ and packaging information 25
8 Appendix-Statement 25
i
Contents
CB3S is a low-power embedded Wi-Fi module that T uya has developed. It consists of
a highly integrated RF chip BK7231N and a few peripherals. CB3S not only supports
the Wi-Fi AP and STA modes but also supports the Bluetooth LE.
1 / 27
1 PRODUCT OVERVIEW
1 Product overview
CB3S is built in with a 32-bit MCU whose running speed can be up to 120 MHz, a
2-MB flash memory, and a 256-KB RAM, to support the T uya cloud connection. The
MCU instructions specially extended for signal processing can effectively implement
audio encoding and decoding.
Besides, it has rich peripherals, such as PWM and UART . There are 5 channels of
32-bit PWM output, making the chip very suitable for high-quality LED control.
1.1 Features
• Built in with the low-power 32-bit CPU, which can also function as an application
processor
• The clock rate: 120 MHz
• Working voltage: 3.0 to 3.6V
• Peripherals: 5 PWMs and 1 UART
• Wi-Fi connectivity
– 802.11 b/g/n
– Channels 1 to [email protected] GHz
– Support WEP, WPA/WPA2, and WPA/WPA2 PSK (AES) security modes
– Up to +16 dBm output power in 802.11b mode
– Support STA/AP/STA+AP working mode
– Support SmartConfig and AP network configuration manners for Android
a...