Wireless LAN Support



Document Download

Wireless LAN Module Specification

Product Japanese(pdf) English(pdf) Remarks
BP3580 Download
Wireless LAN Module
BP3591 Download
Wireless LAN Module
NEW BP3595 Download
Wireless LAN Module
BP3599 Download
  Wireless LAN Module (+ FlashROM)
BP359C Download
  UART Interface Evaluation Board
BP359D Download
  BP3591/ 99 for Pitch Conversion Adapter Board
NEW BP359D Download
  BP3595-only Pitch Conversion Adapter Board

Software Development Specs

Version Release Date Japanese(pdf) Remarks
1.2.2 October 17, 2016 Download

TCP/IP built-in WLAN Specs

Version Release Date Japanese(pdf) English(pdf) Remark
[Japanese] 1.54
[English] 1.52
[Japanese] October 17, 2016
[English] June 9, 2015

Wireless LAN Module Start Guide and Introduction Guide

Version Release Date Document(pdf) Remarks
1.01 February 6, 2013 Download
Start Guide
1.00 - Download
Introduction Guide


  • November 10, 2017 - Update: Firmware
  • May 17, 2017 - Update: Firmware
  • November 21, 2015 - Addition: BP3595 (English)
  • April 4, 2014 - Update: TCP/IP built-in WLAN Specs (Japanese), Firmware
  • November 11, 2013 - Update: Built-in TCP/IP Specs, Firmware
  • October 11, 2013 - Update: Firmware
  • October 1, 2013 - Update: Software development specs, Built-in TCP/IP Specs, Driver, Firmware
  • June 27, 2013 - Addition: BP3599
  • April 18, 2013 - Addition: BP359C, BP359D
  • April 1, 2013 - Update: Start Guide (ver 1.01)
  • January 13, 2013 - Update: Firmware
  • November 16, 2012 - Update: BP3580/BP3591 Wi-Fi LAN Module Specs, Driver
  • August 7, 2012 - Update: Firmware
  • July 25, 2012 - Release: Wi-Fi LAN Modules starter guide, Wi-Fi LAN Modules Introduction Materials
  • July 9, 2012- Update: Software development specs, Built-in TCP/IP Specs, Driver, Firmware
  • May 11, 2012- Update/added: Software development specs, driver, firmware
  • April 12, 2012 - Update: Wi-Fi LAN modules specs
  • March 9, 2012 - Update: Wi-Fi LAN modules specs
  • February 9, 2012 - Update: Software development specs, Built-in TCP/IP LAN specs, firmware
  • January 6, 2012 - Update: Firmware
  • December 20, 2011 - Release: Built-in TCP/IP LAN Specs (English)


Wireless LAN Specifications

What are the compatible operating modes?
STA mode firmware supports adhoc and infrastructure networks.
AP mode firmware supports infrastructure networks.
Is 152bit WEP supported?
Is there a roaming function?
No. For switching to a different AP with the same SSID, connection is made by rescanning after the AP is disconnected.


How do you update the firmware?
Firmware is downloaded upon startup from the host or external Flash memory. Downloading from the host will upgrade the firmware, while downloading from external Flash will require rewriting the contents of the Flash.
Is the source code for device drivers provided?
Linux device drivers include the source code.
Is the internal TCP/IP mode usable via USB or SDIO I/F?
No, the internal TCP/IP is compatible only with the UART I/F. Conversely, the UART I/F cannot be used with standard firmware.

Wireless LAN Module

What is the current status regarding Radio Law (Japan) compliance?
ROHM's module with attached antenna has already obtained Radio Law certification, eliminating the need for an external antenna. Or one of ROHM's certified external antennas can be used. For other options, since certification is required for usage, please contact a ROHM representative for more information.
What type of connector is used for the BP3591?
The BP3591 uses the AXK5F34347YG connector from Panasonic. The other party's connector uses the AXK6F34347YG, also from Panasonic.
What is the difference between Host Reset (HRST) and Power ON Reset (PRST)?
With PRST all H/W are reset, while HRST does not reload the operating mode selection terminals (FLASH_SEL/HOST_SEL/BOOT_SEL0/BOOT_SEL1).
How do you make a connection for the ARM JTAG I/F signal?
Even if disconnected, there should be no problems with normal operation. However, efficient debugging is possible by setting up a test pad via connector at the host side.
What is the operating temperature range?
From -40C to +85C.
Is the MAC address written when shipped?
The MAC address is written in the BP3591 (with attached antenna) before shipment, buth the BP3580 requires writing by the customer. Since the MAC address requires a unique number, please write in a value within the vendor ID range authorized by IEEE.
Is the MAC address written in from the host side during startup?
It can be stored in the EEPROM within the module.
Is software diversity supported?
Antenna selection signal output is possible, enabling support for an external antenna switch.
Which USB standard is supported?
USB 2.0 Hi-Speed mode is supported.
How much will performance suffer when enabling encryption?
ROHM wireless modules are designed to handle encryption processing internally in order to prevent drops in throughput when encryption is enabled, ensuring virtually no performance issues.


What are appropriate values for the WPS PIN code?
An 8-digit PIN code with checksum is used. Therefore, calculation based on the checksum procedure is required. However, the normal AP features an automatic PIN code generator.