SBSL Reset & Teardown (FCC ID 2ACDZ-3303-SBSL)

Before you buy the Broadlink SBSL, check what's inside.

This device is a Broadlink SBSL WiFi module based on the MTK WT2SBSA chipset. It is designed for integration into smart home devices, supporting 802.11b/g/n standards and various communication interfaces.

⚠️ NOTE: Ensure correct battery polarity and voltage (3.0-3.6V).

Quick Specs

Manufacturer: Broadlink
Model: SBSL
Protocol: WiFi
Chipset: Broadlink WiFi
Ecosystem: Broadlink
App: Broadlink App

🔧 Geek Corner (Flashing Info)

Chipset: MTK WT2SBSA
Flashable: ✅ Yes
Info: The module uses an MTK chipset with built-in Flash and RAM, and the FCC ID indicates it is a standalone module that can be flashed.

User Manual

Scanned pages from the official user manual:

SBSL Manual

External Photos

Photos of the device exterior:

SBSL Exterior

Internal Photos

Teardown photos showing the PCB and components:

SBSL PCB

Verdict

The SBSL is a WiFi device from the Broadlink ecosystem.

📄 Click to view full text manual (SEO)

User Manual
Model:3303-SBSL
Module Features
A. Support IEEE802.11b/g/n wirelessstandards
B. SupportWEP、WPAandWPA2 encryption
C. SupportUART\PWM\ADC\GPIO\I2C Interface
D. Support STA\AP\AP+STA mode,etc.
E. Support a key function Configuration
F.Support TLS\SSL protocol andmDNS
G.Support PCB antenna
H. 3.3Vpower supply
I. Size 17.7mm*31mm*3.6mm（with shield）
1. Product Overview (Hardware)
WT2SBSLadopts MTK IOT scheme , is a support 802.11b/g/nWiFi module is ,can
communicate with other device via UART port。Module integrates RF transceiver ,MAC,
Base-Band , all WIFI protocol and configuration information and network protocol stack , can
be widely used in fields such as intelligent home device , remote monitoring equipment ,
medicine and other fields .
Module integrated ARM Cortex-M4F processor , high primary frequencycan reach
192MHz , SRAM 352KB , and built-in 2MB Flash .
1.1 Module basic parameter
1.1.1 Wlan parameter
Frequency Range 2.412 GHz - 2.462 GHz
Wireless Standard IEEE 802.11 b/g/n
RF Power
Antenna Built-in：PCB antnna
Extenrnal：not support
Receiving Sensitivity
802.11b<-91dBm@1Mbps
802.11b<-81dBm@11Mbps
802.11g<-86dBm@6Mbps
802.11g<-69dBm@54Mbps
Protocol Stack IPv4, TCP/UDP/FTP/HTTP/HTTPS/TLS/mDNS
Data Rate（max） [email protected], [email protected], [email protected]
Security Support
Encryption Standard：WEP/WEPA/WPA2
Encryption Algorithm：
WEP64/WEP128/TKIP/AES
Network Type STA/AP/STA+AP/WIFI Direct
802.11 b: 15.2-15.72dBm; 802.11 g:12.36-13.20dBm
802.11 n20: 11.23-12.27dBm; 802.11 n40:9.63-9.71dBm
1.1.2 Absolute Maximum Ratings
Symbol Description Min. Max. Units
Ts Storage temperature -40 125 ℃
TA Ambient operating
temperature
0 70 ℃
Vdd Supply voltage 3.0 3.6 V
Vio Voltage on IO pin 0 3.3 V
ESD ESD protection (HBM) 2000 V
1.1.3 DC Voltage and current
Specifications Min. Typ. Max. Units
VDD 3 3.3 3.6 V
VIL(input low voltage) 0 0.8 V
VIH(input high voltage) 2 3.6 V
VOL(output low voltage) 0 0.4 V
VOH(output high voltage) 2.4 3.6 V
Io 4 16 mA
RPU (Pullup Resistance) 40 190 kΩ
RPD(Pulldown Resistance) 10 50 kΩ
Standby 110 mA
pulse current @TX
11b @18dBm 11Mbps
320 335 mA
pulse current @TX
11g @16dBm 54Mbps
280 290 mA
1.1.4 IEEE802.11b mode
ITEM Specification
Modulation Type DSSS / CCK
Frequency range 2412MHz~2462MHz
Channel CH1 to CH11
Data rate 1, 2, 5.5, 11Mbps
TX Characteristics Min Typical Max. Unit
Transmitter Output Power
11bTarget Power 16 dBm
Frequency Error -10 +10 ppm
Constellation Error( peak EVM)@ target power
1~11Mbps -40
RX Characteristics Min Typical Max. Unit
Minimum Input Level Sensitivity
1Mbps (FER≦8%) -94 -91 dBm
11Mbps (FER≦8%) -84 -81 dBm
Maximum Input Level
(FER≦8%)
-10 dBm
1.1.5 IEEE802.11g mode
ITEM Specification
Modulation Type OFDM
Frequency range 2412MHz~2462MHz
Channel CH1 to CH11
Data rate 6, 9, 12, 18, 24, 36, 48, 54Mbps
TX Characteristics Min Typical Max. Unit
Transmitter Output Power
11gTarget Power 13.5 dBm
Frequency Error -10 +10 ppm
Constellation Error( peak EVM)@ target power
6Mbps -26 dB
54Mbps -33 dB
Transmit spectrum mas...