〜 Realizing your own communication method
where existing method such as Zigbee・Bluetooth・Wi-Fi 〜

WCU – series
Mini wireless module with embedded MCU
WCU-241 series

WCU-C series

WCU-C microwww.k2-denshi.com
WCU-2411

Two RF comms MCU platforms● WCU-241 series
simple & high speed● WCU-C series
multi function & Flash ROM

・Nordic nRF24E1 based platform ・TI CC2510/1110 based platform
・ 16MHz 8051-based MCU
・ 26MHz 8051-based MCU
・EEPROM4k / RAM4k (note)
・Flash32k / RAM4k
note：changes the program size
・Transfer rate 1.2〜500kbps・Transfer rate 250kbps・1Mbps
・ADC 8+2ch（temp sensor） 12bit
・Dual receive func （every 8M）
・USARTx2 I2S AES co-pro
・ADC 8ch 10bit
・On-board antenna
・UARTx1
・Free development tool・Free development tool2

ＷＣＵ−２４１ series
Simple & high speed

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WCU-241 series

ＷＣＵ−２４１•
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2.4GHz Wireless Transceiver Module
8051-based MCU
ADC 8ch 10bit
On-board antenna
Battery operation
1Mbps on shock burst mode
Dual receive function (8M spacing)Communication range 20〜30m(May vary by setting and environment)• On-board voltage regulator¥ 78754

WCU-241 series

Ready to Go Boards(Pre-programmed)¥ 8925• WCU-241D
8ch digital remote control TRX• WCU-241SD ¥ 9975
comms with WCU-241D by PC• WCU-241AT/AR
8ch analog TRX

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WCU-241 series

ＷＣＵ−２４２•
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¥ 9135

2.4GHz Wireless Transceiver Module
Ultra small size 14x20mm
8051-based MCU
ADC 8ch 10bit
1Mbps on shock burst mode
Dual receive function (8M spacing)Battery operation
Communication range 20〜30m(May vary by setting and environment)

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WCU-241 series

ＷＣＵ−２４Ｌ０１＋（Plus）¥ 4725• 2.4GHz Wireless Transceiver module• Micro size 10x20mm• Control by ＳＰＩ (w/o MCU)
• High speed 2Mbps (enhancedshock burst, auto ACK）
• Low power 11.3mA at 1mW(RF pow)
• Communication range 20〜30m(May vary by setting and environment)• Connectivity with WCU-24 series
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WCU-241 series

ＷＣＵ−２４Ｍ¥ 7875• Dedicated motherboard• Programming with RS232C ispossible• Programming and serial link canbe switched• Space for parts to experimentwith the unit
• Debugging software included“Sherpa”• Freeware C Compiler andassembler can be combined
8WCU-241 series

ＷＣＵ−２４１Ｄ・ＳＤ sample usage
8ch remote control test
Monitoring port by PC

8 portPort setting by PC

digital output

WCU-241D receiver mode
RS232C

8 portdigital input
WCU-241SD
Transceiver
WCU-241D transmitter mode

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WCU-241 series

Data I/O remotely controlled by host PC
Ch 1Port output

Ch 2
Data I/O can becontrolled by setting T/RXand channels

Port input

10demonstration of WCU-241 series

Wireless photoplethysmogram demo
Photoplethysmogram detector

Detector output is digitized then transmitted as RFbatterysensorWCU-242

Received RF is demodulated then transferredto the PC

The photoplethysmogram waveform is now
remotely displayed on the PC display

WCU-241

WCU-24U

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demonstration of WCU-241 series

Wireless level meter demo
Photoplethysmogram detector

Detector output is digitized then transmitted as RFbattery

sensor

WCU-242

Received RF is demedulated andconverted back to original analogue
waveform, driving a level meter
The movement of the level meter
represents the remotely sensed
Photoplethysmogram

WCU-24112

demonstration of WCU-241 series

Wireless display demoWCU-241＋WCU-24M＋VFD

WCU-241＋WCU-24M

One of locally stored messages, which is
selected by the switches on the bottom,
is horizontally scrolling displayed
The messages are wirelesslytransferred by a host PC
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ＷＣＵ−Ｃ series
multi function & Flash ROM

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WCU-C series

ＷＣＵ−Ｃ２５１¥ 7875• 2.4GHz wireless transceiver module• 8051-based MCU Flash32k• ADC 8+2ch 12bit• MCU embedded temperature sensor• USARTx2 I2S AES co-pro• On-board antenna• Battery operation• 1.2〜500kbps• Multi channel operation• Communication range 100m15(May vary by setting and environment)

WCU-C series

ＷＣＵ−Ｃ２５１Ｄ★ pre-programmed• Pre-programmed version of WCU-C251• 16 digital I/O port (ON/OFF)• Transmission rate approx 10ms
• Switchable function transmitter or receiver• RF power -30dBm〜1dBm• Switchable Frequency 4ch(2403〜2478MHz)• Output invert function (On RX mode)• Output toggle function (On RX mode)¥ 8925＜the program can be customized＞
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WCU-C series

ＷＣＵ−Ｃ２５１Ａ★ pre-programmed• Pre-programmed version of WCU-C251• 8ch 12bit resolution ADC transfer• 8-bit digital Input or Output• Switchable function transmitter or receiver• Transmit (sample) rate 5ms〜1s• Switchable Frequency 4ch(2403〜2478MHz)• LCD output on RX mode (need level convert)• Serial output on RX mode＜the program can be customized＞
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WCU-C series

ＷＣＵ−Ｃ micro• 2.4GHz wireless transceiver module• 8051-based MCU Flash32k• ADC 8+2ch 12bit• MCU embedded temperature sensor• USARTx2 I2S AES co-pro• Ultra small chip antenna• Battery operating• 1.2〜500kbps• Multi channel operation• Ultra small 16x20mm
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WCU-C series

ＷＣＵ−Ｃ１１１• 315MHz wireless transceiver module• 8051-based MCU Flash32k• ADC 8+2ch 12bit• MCU embedded temperature sensor• USARTx2 I2S AES co-pro• Small on-board antenna• Battery operation• 1.2〜250kbps• Can use low level radio law (in Japan)• Communication range 10m (in Japan)(May vary by setting and environment) 19

WCU-C series

ＷＣＵ−ＣＸＭ• Development board for WCU-C series• Can program radio MCU of TI• Program download and remote debugging bya host PC through USB connection• Free writing software of TI is available• Usable the utility software of TI to test
communication quality• Free compilers and Assemblers available
IAR C and SDCC
¥ 787520

demonstration of WCU-C series

Wireless Sensing１
Transmitter +3-axis accelerometerreceiverservo
Wireless sensing demo setup using WCU-C251
Tilt of the transmitter is reproduced by the movement of 2-axis servo ofthe receiverZ-axis travel of the transmitter is displayed by the LED

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demonstration of WCU-C series

Wireless sensing + PC
Acceleration data recorded to the PC through the USB22

demonstration of WCU-C series

Wireless Scale
300MHz band low power radio
WCU-C micro111
Weigh sensor value
digitized and transmit

WCU-C111
Receive the RF, displays weighon the VFD, also output to PC
by serial communication

Using one-chip MCU only, it can transmit, receive and control of others
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demonstration of WCU-C series

Wireless Scale + PC
Egg size varies
depending on weight

The weigh measured by wireless scale
recorded to the PC through the USB24

demonstration of WCU-C series

Infrared (IR) remote control radio link
The transmitter relays the IR remote via RF to the receiver, that reproduces the opticaloutput. No format dependency by its nature provided IR clock is 38kHz.

IR receivermoduleIR LEDtransmitter

receiverControl ofhousehold appliance

Shutter etc
IR remote control

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demonstration of WCU-C series

8ch Analog & 8ch Digital data transfer
receiver300MHz band (also 2.4GHz band)
LCD output
8ch analog values [mV]Port value + receive signal level
Transmit every 20ms（or faster）
transmitter

USB output
Digital output
Data transfer using WCU-C111

digitalanalog8ch analog and digital data are transferred real-time(ADC 12bit)26

demonstration of WCU-C seriestransmitter

Solar cell operation
2.4GHz band (also 300MHz band)
Solar cell
Temperature + cell voltage
receiverPort value + receive level
output on LCD

Test of solar cell operation using WCU-C251
Wafer temperature of the MCU, cell voltage
and port input value are transmitted
Sleep mode current less than 1uA
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demonstration of WCU-C seriesMultiple data transfers
receiverTransmitter 1
Transmitter 2
Temperature + supply voltage
Port value + receive level
Transmitter 2
Temperature + supply voltage
Port value + receive level

Transmitter 1
Multiple transmitter data transfer using two WCU-C251s
Each WCU-C251 transmits its wafer temperatures,power voltage and input state
Multiple data transfers are possible bycommunication control settings

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WCU-C251U

Simple spectrum analyzer
A simple 2.4GHz spectrum analyzer
using USB-equipped WCU-C251UBoth firmware and PC application
can be downloaded from TI forum

TI CC2511 based29

Custom Design
Not happy with Zigbee’s slow response ・・・
Channels of Bluetooth not enough ・・・
Wi-Fi is too power hungry ・・・
We offer to develop your own communication
system overcoming the limitation of theexisting methods.

Make a full-custom design(radio system, sensor devices, etc)30

Radio system application• Wireless remote control (high security)• Temperature monitor (solar cell・energy saving)• Hart beat ・ vital warmth monitor• Location identification• Wireless nurse call
• Security sensor• Voice communication (high security・transceiver)31

Custom productWireless data logger
originally this unit is used as “driving doctor” (automobile operation assessment system)
The image on thedisplay moves
around exactly
reflecting thetransmitter’smovementtransmitter
3-axis accelerometer3-axis gyro sensor
Micro SD card
External GPS connection

receiverUSB link
CDC class

Real-time current display andlogging at host PC (6-axis)

32Custom productMulti-function radio remote control(Rewritable firmware by tow-way communication)“SPIDER PRO” can record all DTB ch automaticallyduring the week and search exposure. This is multifunction radio remote control for “SPIDER PRO”.

PTP INC. Co. ltd(case design Fumie Shibata)33

Custom productWireless current logger
Contribute to energy saving by monitoring current value

ReceiverWCT-110Distribution board

Current TranceTransmitter WCT-100
Transmitter
WCT-100

Real-time current display and logging at host PC
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Custom productTemperature monitor for cow
joint research with Osaka environmental agriculture, forestry andfisheries institute and industrial technique research institute
Develop wireless monitoring
instrument of temperature for cow

Datatransferreceiver

Small wireless transmitter withwearable temperature logger

Fix designed
equipment to cow

Transmitter Temperature
ReceiversensorKnowing the temperature
support delivery of cow
support period of heat
prevention of illness
Informationetc
processing
Useful for warm management

PC software

Charging
portDiameter 55mm thickness 13mm
Material epoxy resin
Power
Li-Po battery
Interval 10 second

USB link

Display date, temperature,transmitter ID,
battery residual quantity
and transfer EXEL

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Custom productWireless CG controller
Transmit 3-axis magnetic field and 3-axis acceleration datatransmitter

Incorporating micro
6-axis sensor
articleSpecific

frequency

2.4GHzSampling interval

25ms

Communication range

5m

Battery life

12hours

Battery typeLi-ion / 3.8V 600mA

Consumption current

38mA

The device and evaluation kit available at
Aich micro intelligent corporation

The view point of the 3-Dgraphics on the PC, to which
receiver is attached, alignes tothe direction of the transmitter.
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Cypress CYWUSB6953

ＷＣＵ−６９５３••••••••

2.4GHz wireless transceiver module
Incorporating Cypress CYWUSB6953
Built-in MCU ＰＳｏＣ
Comparator, ADC, counter, communication,
etc programmable analog circuit
Free pin assignment
Extensive tools and libraries available
DSSS (direct spread spectrum system)
Communication range 20〜30m(changeby setting and environment)37

demonstration of Cypress CYWUSB6953

Wireless sensing 2Usable variety of radio devices
Using Cypress CYWUSB6953
transmitterreceiver

The transmitter transmits its attached accelerometers’ data real time
The receiver is reproduced transmitter’s tilt by controlling the servo

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hardware/software design & development
Include RF & system design
Usable various RF measuring instruments
Circuit design
Software design

PCB design
Mass production
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Test for various RF certifications
Also offer support on behalf of the certification test

Small power
certification test

Micro power
certification test

(japan)(japan)

FCC・ETSI(US EU)

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• Embedded system• Wireless technology• Radio control system• Sensing technology• Sensor application design• Control technology(come with exclusive use tools)• RF certification support
We support whole the production
from system design to mass production
Our experience varies form single article to mass production of over 10 million units
Keitsu Electronic Co., Ltd.
http://www.k2-denshi.com/
3-7-14 Akutagawa-cho, Takatsuki-city, Osaka 569-1123 JAPANTEL/FAX 072-685-8847 (+81-72-685-8847)

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