B85 Reset & Teardown (FCC ID 2AE2JPSF-B85)

Overview

PSF-B85 is an ultra low-power Wi-Fi module designed by ITEAD. The module 
adopts the highly integrated Wi-Fi chip ESP8285. It features industry's highly 
competitive compact packaging size and ultra-low power technology. Specially 
designed for mobile devices and the Internet of Things application, it connects 
physical devices to Wi-Fi wireless network to make Internet or LAN communications. 
PSF-B85 has completed self-contained wireless network, with built-in 32-bit kernel 
processor, on-chip SRAM, it can be used as the main control chip, but also as a WiFi 
adapter. Simply apply it to other microcontroller-based designs by SPI/SDIO or 
I2C/UART interface communication. 
PSF-B85 supports multiple packaging form. Supports antenna of IPEX connector 
and stamp hole interface. 
PSF-B85 is widely applied to smart power grid, smart transportation, smart home, 
handheld devices, industrial control, etc. 

Features 

802.11 b/g/n/d/e/i/k/r 
Support STA/AP/STA+AP mode 
WPA/WPA2 PSK and WP 
Built-in TCP/IP protocol stack, support multi-way TCP Client connection 
Support rich Socket AT commands 
Support UART/GPIO data communication interface 
Built-in 32 bit MCU, also work as application processor 
3.3V single supply 
Wi-Fi Direct (P2P) support 
Support MIMO 1x1 and 2x1, STBC, A- MPDU and A-MSDU aggregation and 0.4μs 
guard interval 
WMM power save U-APSD 
Multiple queue management to fully utilize traffic prioritization defined by 802.11e 
standard. 
Adaptive rate fallback algorithm sets the optimum transmission rate and Tx power 
based on actual SNR and packet loss information. 
Functions 

Main functions 
The main function of PSF-B85 includes serial transparent transmission, PWM control, 
GPIO control. 
Serial transparent transmission good transmission performance, the maximum 
transmission rate is 460800bps. 
PWM control adjust lighting, adjust led color, adjust motor speed and much more. 
GPIO control control switch, relay and more. 
Operating Mode 
PSF-B85 supports three operating mode:STA/AP/STA+AP. 
STA mode: the module connects to Internet via a router, thus mobile phone or 
computer can remote control devices via Internet. 
AP mode: PSF-B85 module worked as a hotspot, which realizes directly 
communication between the module and phone/ computer, enables wireless LAN 
control. 
STA+AP mode: this is coexistence mode, which can realize seamlessly switch via the 
Internet control, easy operation. 
Applications 
Serial to Wi-Fi; 
Industrial transparent transmission DTU; 
Wi-Fi remote monitoring/control; 
Intelligent Toy; 
Color LED control; 
Firefighting and security integrated intelligence management; 
Intelligent card terminals, wireless POS machines, Wi-Fi cameras, hand-held devices, 
etc. 

Main Technical Specifications 

Connector
External：stamp hole interface
External：I-PEX connector
Hardware
Peripheral
Interface UART，IIC，PWM，GPIO，ADC
Operating Voltage 3.3V
GPIO Drive
capability Max：12mA
Operating Current
Continue sending=>Average val...