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Raspberry Pi Electricity Monitor

James Singleton
July 10, 2013
Programming
1
37k

Raspberry Pi Electricity Monitor

How and why I built a system for monitoring the electricity consumption of my home with a Raspberry Pi. Full details at http://unop.co.uk. Check out http://shutdownscanner.com (a service for automatically monitoring how many computers have been left on out of hours)

James Singleton

July 10, 2013
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Transcript

  1. Raspberry Pi Electricity Monitor
    Reverse Engineering Serial Data Protocols
    James Singleton
    unop.co.uk

    View Slide

  2. Maplin
    ●
    £13
    ●
    Download data feature
    ●
    www.maplin.co.uk/wireless-electricity-monitor-611581

    View Slide

  3. Looks like this...
    ●
    Windows only (and not very good)
    ●
    PC power consumption negates benefit

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  4. And this...

    View Slide

  5. And this...

    View Slide

  6. And this...

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  7. And sometimes like this...

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  8. That makes socket sad

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  9. Linux
    ●
    Windows requires a driver install
    ●
    And it's buggy (causes BSOD)
    ●
    USB serial driver included on Raspbian
    ●
    Just plug it in
    ●
    And you can talk to the device

    View Slide

  10. That makes socket smile

    View Slide

  11. View Slide

  12. View Slide

  13. View Slide

  14. View Slide

  15. How
    ●
    That's the why and the results
    ●
    You can read about the rest of the results online
    ●
    But how would you go about making generic
    hardware work on another OS?
    ●
    Methods and tools
    ●
    RS232 hackery

    View Slide

  16. Sniff the data

    View Slide

  17. The data
    0 0.09933916sems.exeIRP_MJ_CREATE ProlificSerial0 SUCCESS Options: Open
    1 0.00001928sems.exeIOCTL_SERIAL_SET_QUEUE_SIZE ProlificSerial0 SUCCESS InSize: 2500 OutSize: 2500
    2 0.00000559sems.exeIOCTL_SERIAL_GET_BAUD_RATE ProlificSerial0 SUCCESS
    3 0.00000419sems.exeIOCTL_SERIAL_GET_LINE_CONTROL ProlificSerial0 SUCCESS
    4 0.00000391sems.exeIOCTL_SERIAL_GET_CHARS ProlificSerial0 SUCCESS
    5 0.00000391sems.exeIOCTL_SERIAL_GET_HANDFLOW ProlificSerial0 SUCCESS
    6 0.00000391sems.exeIOCTL_SERIAL_GET_BAUD_RATE ProlificSerial0 SUCCESS
    7 0.00000363sems.exeIOCTL_SERIAL_GET_LINE_CONTROL ProlificSerial0 SUCCESS
    8 0.00000363sems.exeIOCTL_SERIAL_GET_CHARS ProlificSerial0 SUCCESS
    9 0.00000363sems.exeIOCTL_SERIAL_GET_HANDFLOW ProlificSerial0 SUCCESS
    100.05133837sems.exeIOCTL_SERIAL_SET_BAUD_RATE ProlificSerial0 SUCCESS Rate: 9600
    110.00038217sems.exeIOCTL_SERIAL_SET_RTS ProlificSerial0 SUCCESS
    120.00098141sems.exeIOCTL_SERIAL_SET_DTR ProlificSerial0 SUCCESS
    130.00094090sems.exeIOCTL_SERIAL_SET_LINE_CONTROL ProlificSerial0 SUCCESS StopBits: 1 Parity: NONE WordLength: 8
    140.00003269sems.exeIOCTL_SERIAL_SET_CHAR ProlificSerial0 SUCCESS EOF:0 ERR:0 BRK:0 EVT:0 XON:11 XOFF:13
    150.00000503sems.exeIOCTL_SERIAL_SET_HANDFLOW ProlificSerial0 SUCCESS Shake:1 Replace:40 XonLimit:2048 XoffLimit:512
    160.00000810sems.exeIOCTL_SERIAL_PURGE ProlificSerial0 SUCCESS Purge: TXCLEAR RXCLEAR
    170.00000447sems.exeIOCTL_SERIAL_SET_TIMEOUTS ProlificSerial0 SUCCESS RI:20 RM:20 RC:20 WM:20 WC:3000
    180.00000503sems.exeIOCTL_SERIAL_GET_COMMSTATUS ProlificSerial0 SUCCESS
    190.00086547sems.exeIRP_MJ_WRITEProlificSerial0 SUCCESS Length 4: ....
    200.03268125sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 8: ........
    211.30080499sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 0:
    220.00082832sems.exeIRP_MJ_WRITEProlificSerial0 SUCCESS Length 4: ....
    231.30087539sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 0:
    240.00047604sems.exeIRP_MJ_WRITEProlificSerial0 SUCCESS Length 4: ....
    250.07094952sems.exeIRP_MJ_READ ProlificSerial0 SUCCESS Length 64: S01....2S0222..1S03....2S04....2S05....2S06....2S07....2S08....2
    260.06694426sems.exeIRP_MJ_READ ProlificSerial0 SUCCESS Length 64: S09....2S10....2S11....2S12....2S13....2S14....2S15....2S16....2
    270.02160247sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 1: .
    281.30083293sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 0:
    290.00047799sems.exeIRP_MJ_WRITEProlificSerial0 SUCCESS Length 4: ....
    300.05098469sems.exeIRP_MJ_READ ProlificSerial0 SUCCESS Length 64: S01DAY..........................................................
    310.06696158sems.exeIRP_MJ_READ ProlificSerial0 SUCCESS Length 64: ......................MON.......................................
    320.03139673sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 10: ..........
    331.30079717sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 0:

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  18. Hex
    190.00088894sems.exeIRP_MJ_WRITEProlificSerial0 SUCCESS Length 4: AA 00 00 AD
    200.03275919sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 8: AA F0 00 AD 01 00 01 00
    211.30085695sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 0:
    220.00095264sems.exeIRP_MJ_WRITEProlificSerial0 SUCCESS Length 4: AA 01 00 AD
    230.05059023sems.exeIRP_MJ_READ ProlificSerial0 SUCCESS Length 64: 53 30 31 44 41 59 07 00 08 00 08 00 08 00 0C 0
    240.06584636sems.exeIRP_MJ_READ ProlificSerial0 SUCCESS Length 64: 06 00 07 00 09 00 08 00 09 00 0C 00 0E 00 08 0
    250.03186327sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 10: 00 00 00 00 00 00 00 00 00 11
    261.30084215sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 0:
    270.00109204sems.exeIRP_MJ_WRITEProlificSerial0 SUCCESS Length 4: AA 02 00 AD
    280.06994297sems.exeIRP_MJ_READ ProlificSerial0 SUCCESS Length 64: 53 30 31 FF FF 00 00 32 53 30 32 32 32 13 08 3
    290.06694873sems.exeIRP_MJ_READ ProlificSerial0 SUCCESS Length 64: 53 30 39 FF FF 00 00 32 53 31 30 FF FF 00 00 3
    300.02180892sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 1: F9
    311.30084885sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 0:
    320.00063863sems.exeIRP_MJ_WRITEProlificSerial0 SUCCESS Length 4: AA 01 00 AD
    330.05113499sems.exeIRP_MJ_READ ProlificSerial0 SUCCESS Length 64: 53 30 31 44 41 59 07 00 08 00 08 00 08 00 0C 0
    340.06591955sems.exeIRP_MJ_READ ProlificSerial0 SUCCESS Length 64: 06 00 07 00 09 00 08 00 09 00 0C 00 0E 00 08 0
    350.03220409sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 10: 00 00 00 00 00 00 00 00 00 11
    361.30084410sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 0:
    370.00054309sems.exeIRP_MJ_WRITEProlificSerial0 SUCCESS Length 4: AA 02 00 AD
    380.07091544sems.exeIRP_MJ_READ ProlificSerial0 SUCCESS Length 64: 53 30 31 FF FF 00 00 32 53 30 32 32 32 D2 07 3
    390.06695292sems.exeIRP_MJ_READ ProlificSerial0 SUCCESS Length 64: 53 30 39 FF FF 00 00 32 53 31 30 FF FF 00 00 3
    400.02219137sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 1: B7
    411.30084717sems.exeIRP_MJ_READ ProlificSerial0 TIMEOUT Length 0:

    View Slide

  19. Reimplement
    ●
    Poll
    ●
    Extract value
    ●
    Compress
    ●
    Save
    ●
    Host
    ●
    Graph
    ●
    Cron tail
    ●
    Digital sign (local or remote)

    View Slide

  20. Future improvements
    ●
    Use a DB (SQLite)
    ●
    Post to online API
    ●
    Combine with pricing data
    ●
    Calibrate against meter
    ●
    Combine with plug in meter for voltage
    ●
    An app!

    View Slide

  21. The plug
    ●
    I've got a startup
    ●
    Shutdown Scanner
    ●
    Service to automatically measure how much
    power/money is wasted by inactive computers
    left on over night or at weekends
    ●
    ShutdownScanner.com
    ●
    Lots more graphs

    View Slide

  22. View Slide

  23. View Slide

  24. View Slide

  25. Thanks

    View Slide