Silicon Laboratories Wireless M-Bus-EK User Manual
Silicon Laboratories Wireless M-Bus-EK User Manual

Silicon Laboratories Wireless M-Bus-EK User Manual

Demonstration kit

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W
M-B
I R E L E S S
1. Kit Contents
The Wireless M-Bus Demonstration Kit contains the following items:
Wireless M-Bus Demonstration Board
3.6 V Lithium battery
USB cable
AC to DC power adapter
868 MHz antenna
2. Introduction
The purpose of the Wireless M-Bus Demonstration Kit is to demonstrate a low-power meter application using the
Wireless M-Bus stack. The demonstration has three basic system components:
Wireless M-Bus Meter Demonstration Kit (Meter)
Monitor
PC Application
The Wireless M-Bus Meter Demonstration Kit performs the basic metering functions. It will either count pulses or
measure the temperature. The Meter will also periodically wake up and transmit the data using the Wireless M-Bus
protocol.
The Monitor measures and displays the current consumption of the Meter. The Monitor also communicates with the
PC application and configures the Meter over a UART connection.
The Wireless M-Bus Demonstration board is shown in Figure 1. The right half of the board implements the Meter,
and the left half of the board implements the Monitor.
Rev. 0.1 2/10
Wi r e l e s s M - B u s - E K
D
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EMONSTRATION
Figure 1. Wireless M-Bus Demonstration Board
Copyright © 2010 by Silicon Laboratories
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Wireless M-Bus-EK
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Summary of Contents for Silicon Laboratories Wireless M-Bus-EK

  • Page 1 The Wireless M-Bus Demonstration board is shown in Figure 1. The right half of the board implements the Meter, and the left half of the board implements the Monitor. Figure 1. Wireless M-Bus Demonstration Board Rev. 0.1 2/10 Copyright © 2010 by Silicon Laboratories Wireless M-Bus-EK...
  • Page 2: Hardware Overview

    Wireless M-Bus-EK 3. Hardware Overview The Wireless M-Bus Demo board has two sections. The Wireless M-Bus meter section is on the right half as shown in Figure 2. C8051F930 Si4431 CP2400 Figure 2. Meter Section The Wireless M-Bus meter section includes the following components.
  • Page 3 Wi reless M-Bus-EK C8051F342 CP2400 Figure 3. Monitor Section The monitor section includes the following components:  C8051F342 USB microcontroller  CP2400 LCD driver The C8051F342 microcontroller is used to monitor the meter current consumption, display the current consumption on the eight-digit alphanumeric display, and communicate over USB with the PC applications on the PC host. The discrete current amplifier and integrator are used with the internal comparator and timer to calculate the average current consumption.
  • Page 4: Software Overview

    Wireless M-Bus-EK 4. Software Overview The software system diagram is shown in Figure 4. The meter application firmware runs on the C8051F930 and is written on top of the Wireless M-Bus stack. The meter application firmware measures the temperature or counts the number of pulses and is configured over the UART interface by the monitor application firmware.
  • Page 5 Wi reless M-Bus-EK 5. Install Wireless Meter-Bus Software Download the Wireless M-Bus demo software from the Silicon Labs web site: www.silabs.com/wirelessmbus ® ® ® ® ® The Wireless Meter-Bus demo requires Windows 2000 , XP , Server2003 , Vista , or Windows 7 .
  • Page 6: Hardware Setup

    Wireless M-Bus-EK 7. Hardware Setup Please install the USBXpress drivers before connecting the Wireless M-Bus demo board to the PC (see “6. Install USBXpress Driver”). The Wireless M-Bus Demo Board has three headers on the left side of the board to configure the C8051F342 and C8051F930 power sources.
  • Page 7 Wi reless M-Bus-EK 8. PC Application After installation, the Wireless M-Bus PC application is located in the following default directory: C:\SiLabs\MCU\Wireless_Meter_Bus\Software\MBusDemo.exe The initial screen is shown in Figure 6. Figure 6. Wireless M-Bus Demo PC Application If the M-Bus demo hardware is connected to the PC and the USBXpress driver has been installed, the demo board serial number should be displayed in the Device drop-down menu.
  • Page 8 Wireless M-Bus-EK The power consumption of the meter depends on the parameter settings. The PC application allows the following parameters to be set:  Transmit Period  Data Field Length  M-Bus Mode  Transceiver Mode  Data Select ...
  • Page 9 Wi reless M-Bus-EK 8.5. Data Select The options for the Data Select menu are:  Pulse  Temperature  None The selected data is displayed on the LCD and transmitted in the data payload. The Pulse option provides a pulse counter. The C8051F342 acts as a virtual water or gas meter. The C8051F930 will wake up on each rising and falling edge and count the number of pulses.
  • Page 10 Wireless M-Bus-EK 9. Wireless M-Bus Stack The source code for the Wireless M-Bus stack is available as a separate download from the M-Bus web page: www.silabs.com/wirelessmbus Additional information on the Wireless M-Bus stack may be found in the following application notes: “AN451: Wireless M-Bus Software Implementation”...
  • Page 11 Wi reless M-Bus-EK 10. Si4431 Wireless M-Bus Development Platform The Si4431 Wireless M-Bus Development Platform requires the purchase of the following items:  Three SDBC-DK3 EZRadioPRO Wireless Development Kits  Three 4431-DKDB3 - Si4431 +13 dB High-Band Test Cards  Two EC3 -USB Debug Adapters ...
  • Page 12 Wireless M-Bus-EK 11. Si1002 Wireless M-Bus Development Platform The Si1002 Wireless M-Bus Development Platform requires the purchase of the following items:  Three Si1000 Development Kits  Three Si1002 Daughter Cards  One Supported Unlimited Compiler (Keil, Raisonance, or SDCC) The Basic setup is shown in Figure 8.
  • Page 13: Additional Information

    Wi reless M-Bus-EK 12. Additional Information For additional information on the Wireless M-Bus stack, refer to the following application notes: “AN451: Wireless M-Bus Software Implementation” “AN452: Wireless M-Bus Stack Programmers Guide” Additional Information can be found in the following product datasheets C8051F930—Low-Power MCU C8051F340—USB MCU CP2400—LCD controller...
  • Page 14: Header Descriptions

    Wireless M-Bus-EK 13. Header Descriptions Headers J10 and J11 may be configured to select the Monitor section power source. Table 1. Monitor Section Power Options Monitor Section Power Source USB Bus Power Short 2-3 Remove Shorting Block AC to DC Power Adapter...
  • Page 15 Wi reless M-Bus-EK Header J5 and Header J6 are provided to permit the usage of an external current meter. Normally, a shorting block in installed on J5 and J6 is not populated with a shorting block. To use an external meter, install a shorting block on J6;...
  • Page 16 Wireless M-Bus-EK 14. Schematics Rev. 0.1...
  • Page 17 Wi reless M-Bus-EK Rev. 0.1...
  • Page 18 Wireless M-Bus-EK Rev. 0.1...
  • Page 19 Wi reless M-Bus-EK Rev. 0.1...
  • Page 20 Silicon Laboratories products are not designed, intended, or authorized for use in applications intended to support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where per- sonal injury or death may occur.
  • Page 21 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Silicon Laboratories WIRELESSMBUSEK...

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C8051f930Si4431 ezradioproCp2400

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