background image

 

OG_MU4-RS2IF_v10e                                                                                                                              Circuit Design, Inc. 

 

OPERATION GUIDE 

 
 

 
The MU-4 RS232C interface board, MU4-RS2IF is a development board for planning radio system with an RS232C 
interface connection function that uses the embedded low power radio modem MU-4. Purchasing the board enables 
you to begin evaluating communication with the MU-4 immediately. 
 
The board with MU-4 can be controlled using simple dedicated commands, so that the developer can concentrate 
on designing the protocols for transmitting and receiving data, without needing to be aware of control of the radio 
component. Since the control program created by the user accesses the host COM port, users can apply their fund 
of knowledge of RS232C technology. 
 
 

 1.1.1 The MU4-RS2 

 
In  this  operation  guide,  for  the  sake  of  convenience,  the  MU-4  RS232C  interface  board,  MU4-RS2IF  with  the   
embedded  low  power  radio  modem  MU-4  mounted  on  it  is  referred  to  as  the  MU4-RS2.  Before  using  the  board, 
mount the  MU-4 on the MU4-RS2IF. When mounting the MU-4, observe the following cautions,  and carry out the 
soldering carefully. 
 

 

 

Cautions for soldering 

  To prevent damage to the connectors, solder the joints quickly. 

  Avoid connection defects. 

  In order to prevent damage to the MU-4 and the MU4-RS2IF from static electricity, earth yourself 

before starting work. 

  Do not cause short circuits by dripping solder on the board. 

 

 
 
 

 Important 

The development board does not include module MU-4. Please make sure to order it if needed. 
It  is  not  possible  simply  to  replace  communication  using  existing  RS232C  system  equipment  connected 
with  a  cable,  with  MU4-RS2  wireless  communication.  The  hardware  and  software  must  be  designed 
specifically for the MU-4.

 

 

MU4-RS2

 

-

 

MU4-RS2IF

 

-

 

MU-4-434

 

-

 

+

 

=

 

Chapter 1 The MU4-RS2IF 

1.1 Outline

 

 

Caution

 

Summary of Contents for MU-4 RS232C

Page 1: ...power radio modem MU 4 MU 4 RS232C Interface Board MU4 RS2IF Operation Guide Version 1 0 Sep 2020 CIRCUIT DESIGN INC 7557 1 Hotaka Azumino city Nagano 399 8303 JAPAN Tel 81 0263 82 1024 Fax 81 0263 82...

Page 2: ...unctions 5 2 2 Block Diagram 6 2 3 Main Specifications 7 2 4 Channel Table 7 2 5 External dimensions 8 2 6 Circuit Diagram 9 Chapter 3 How to Use the MU4 RS2 10 3 1 System Configuration Example 10 3 2...

Page 3: ...venience the MU 4 RS232C interface board MU4 RS2IF with the embedded low power radio modem MU 4 mounted on it is referred to as the MU4 RS2 Before using the board mount the MU 4 on the MU4 RS2IF When...

Page 4: ...user systems are publicly available Compact size 47 71 18 mm fits in a small housing Features of the MU2 ESP evaluation program 1 You can issue all commands for controlling the interface board with m...

Page 5: ...ents are as follows First please check that you have all the items 1 4 1 Accessories 1 MU 4 RS232C interface board MU4 RS2IF 1 2 Battery holder 1 3 Spacers used as legs 10 mm 4 4 Screws for spacers M...

Page 6: ...n off the power and on once again after a while approx 5 seconds 07 Power LED The LED comes on when the power switch is turned on 08 Power switch A power switch Check that the power terminal is connec...

Page 7: ...2 4 5 6 7 1 8 9 12 11 10 13 14 INI RXD TXD RTS CTS MOD RST RXM RF GND VCC DI DO RXL CN1 DC 3 2v 12v LED1 LED3 LED2 Power terminal SW1 Power switch 1 RXD 2 TXD 3 DTR 4 GND 5 DSR 6 RTS 7 CTS 8 9 CN2 D...

Page 8: ...nnector D Sub 9 pin male Refer to the operation guide of the MU 4 mounted on the MU4 RS2IF for the channel table The frequency band is shown on the label of the MU 4 Parameter Specification Unit Remar...

Page 9: ...cuit Design Inc 8 OPERATION GUIDE MU4 RS2 MU 4 MU4 RS2IF 2 5 External Dimensions 30 8 25 7 9 14 2 6 6 5 17 4 47 40 64 57 51 1 6 7 1 4 lead antenna 180 4 3 RF GND VCC RXD CTS INI RXM DO RXL TXD RTS MOD...

Page 10: ...OG_MU4 RS2IF_v10e Circuit Design Inc 9 OPERATION GUIDE 2 6 Circuit Diagram MU 4...

Page 11: ...55 GI 02 EI 03 UI 0055 GI 02 EI 04 MU2 RS2 MU4 RS2 Group2 1 N system Group3 1 N system Note UI User ID GI Group ID EI Equipment ID DI Destination ID Since it is treated in the same way as the MU 4 ref...

Page 12: ...UI 0000 Group ID GI 00 Equipment ID EI 01 Destination ID DI 01 Channel 0 channel 2 UART related parameters Baud rate 19 200 bps parity none stop bit 1 3 Parameters related to internal operation Mode...

Page 13: ...l LED terminals have been newly added to this product In addition if you attach LEDs to the case connect them with inch pitch through holes with reference to the diagram below MU 4 RS232C cable User P...

Page 14: ...tion of a ground in order to exploit its performance fully connect it to the largest possible ground pattern when mounting the MU 4 on your circuit board In addition in the case of two way communicati...

Page 15: ...e MU4 RS2 MU 4 MU4 RS2IF is a program that accesses the COM port The method of developing a program is basically the same as for the MU 4 except for accessing a virtual COM port Refer to Chapter 6 How...

Page 16: ...cuits and reverse connections may result in overheating and damage and must be avoided at all costs Ensure that the power supply has been switched off before attempting any wiring work The case is con...

Page 17: ...OG_MU4 RS2IF_v10e Circuit Design Inc 16 OPERATION GUIDE REVISION HISTORY Version Date Description Remark 1 0 Sep 2020 MU4 RS2IF The first issue...

Reviews: