Difference between revisions of "Lascar Electronics EL-USB-2"

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|-
|-
| 0x20
| valign="top" | 0x20
| valign="top" | 1
| style="padding: 0;" |
{| border="0" width="100%" style="margin: 0;" class="alternategrey sigroktable"
|-
! style="width: 3em;" | Bit
! align="left" | Alarm conditions bitfield (1=enable)
|-
| 0
| temperature high
|-
| 1
| 1
| alarm conditions bitfield
| temperature low
|-
| 2
| temperature high hold
|-
| 3
| temperature low hold
|-
| 4
| relative humidity high
|-
| 5
| relative humidity low
|-
| 6
| relative humidity high hold
|-
| 7
| relative humidity low hold
|}


|-
|-

Revision as of 16:43, 25 November 2012

EL-USB-2

The Lascar Electronics EL-USB-2 is a USB-based temperature and humidity logger.

See Lascar Electronics EL-USB-2/Info for more details (such as lsusb -vvv output) about the device.

Hardware

Photos

  • EL-USB-2 side.jpg
  • EL-USB-2 uncapped.jpg
  • EL-USB-2 battery.jpg
  • EL-USB-2 sensor.jpg
  • EL-USB-2 PCB top.jpg
  • EL-USB-2 PCB bottom.jpg
  • EL-USB-2 F321.jpg
  • EL-USB-2 24LC256.jpg

Protocol

Status structure

Offset Size Value
0x00 2 unsigned little-endian, device type? 3=EL-USB-2, 9=EL-USB-CO
0x02 16 NULL-terminated device name, 15 chars max
0x12 1 Start time, hour (0-23)
0x13 1 Start time, minute (0-59)
0x14 1 Start time, second (0-59)
0x15 1 Start date, day (1-31)
0x16 1 Start date, month (1-12)
0x17 1 Start date, year (year - 2000)
0x18 4 unknown
0x1c 2 unsigned, little-endian samplerate (seconds between samples)
0x1e 2 unsigned, little-endian number of stored samples
0x20 1
Bit Alarm conditions bitfield (1=enable)
0 temperature high
1 temperature low
2 temperature high hold
3 temperature low hold
4 relative humidity high
5 relative humidity low
6 relative humidity high hold
7 relative humidity low hold
0x21 1 current status? (2=stopped, 3=logging)
0x22 1 temperature alarm high (value + 40) * 2
0x23 1 temperature alarm low (value + 40) * 2
0x24 4 unknown (00 00 00 3f, 00 00 80 3f)
0x28 4 unknown (00 00 20 c2)
0x2c 2 unknown (00 00)
0x2e 2 unknown (possible temp unit, 00 00=C, 01 00=F)
0x30 4 firmware version (ASCII, not NULL-terminated
0x24 2 unsigned little-endian, serial number
0x26 2 unknown (00 00)
0x28 1 relative humidity alarm high (value * 2)
0x29 1 relative humidity alarm low (value * 2)
0x2a 2 unknown (00 00)
0x2c 4 unknown (00 00 00 00)

The rest of the 128-byte payload is padded with 0xff.

Resources

TODO.

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