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Sandor Laboratories Seismometer

This is a project to create a homemade seismometer

Usage

Data Collector

Sample Format

Samples are output with the C-format string S|%02X|%08X|%016llX|%016llX which corresponds to S|<key>|<index>|<timestamp>|<data>. Samples may be easily filtered via grep 'S|<key>' and separated by the | deliminator.

Currently the following log keys are defined:

  - INVALID                  =  0
  - Accelerometer X          =  1
  - Accelerometer Y          =  2
  - Accelerometer Z          =  3
  - Accelerometer M          =  4
  - Accelerometer X Filtered =  5
  - Accelerometer Y Filtered =  6
  - Accelerometer Z Filtered =  7
  - Accelerometer M Filtered =  8
  - Accelerometer TEMP       =  9
  - Pendulum 10X             = 10
  - Pendulum 100X            = 11
  - Pendulum Filtered        = 12

Commands

  • Force a soft-reboot: REBOOT
    • Reboot is triggered via a watchdog timer timeout so soft-reboot cannot be triggered if stalled or if the watchdog timer is disabled.
  • Reset EEPROM: RESETEEPROM
    • Resets EEPROM to default values
    • Command input must be an exact match (e.g. no trailing space)
  • Set Sample Key Mask: SAMPLEKEYMASKSD<key mask>, SAMPLEKEYMASKSTDOUT<key mask>
    • Configures which sample channels are actively logged to the SD card and STDOUT respectively
    • Key masks must be passed as hexadecimal mask with each bit corresponding to a key to be logged (LSB is key '0')
  • Set RTC: T<unix epoch in seconds>
    • Example setting RTC via Bash and UART: echo T$(date +%s) > /dev/ttyACM0

Dependencies

Data Collector

  • SD Card Library: carlk3's no-OS-FatFS-SD-SPI-RPi-Pico
  • Optional
    • Compression Library: zlib
      • https://zlib.net/
      • Enable with CMAKE flag ENABLE_ZLIB_DATA_FILE_COMPRESSION
      • Tested with version 1.2.13
      • Library source directory at data_collector/lib/zlib

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