Opened 15 years ago

Closed 14 years ago

Last modified 11 years ago

#1454 closed defect (fixed)

problems with Sensor mode in Measure v28

Reported by: walter Owned by: walter
Priority: High Milestone:
Component: Measure Version: Unspecified
Severity: Unspecified Keywords:
Cc: Distribution/OS: OLPC
Bug Status: Assigned


Hi Walter,

I downloaded the new version of measure and run some test. I noticed
that the voltage sensor button has a different behavior... perhaps the
right one, but let me explain. There are two button in sensors:
resistance and voltage sensors.

I am only using resistance sensors so far (temp, air-humidity, light,
magnet, switch) and the data reading varies... in many cases when you
connect the sensor, you can't see the reading because it is out of the
range that can be displayed. For example, I just connected a light
sensor (pic included) and I see the reading, but when I cover the
sensor, the reading disappears. I know it is working because when I
hit record I can see the reading at the top (data log included).

We had that problem in Nigeria and we used the voltage sensor button,
which showed the data reading at a different range (like the button
image suggests). I clicked the voltage button now and instead of the
behavior I just described, I noticed the microphone port is disabled.

As I said, I don't know if the voltage sensor is behaving the right
way, but we need to find a way to display the curve when the reading


Change History (8)

comment:1 Changed 14 years ago by RafaelOrtiz

  • Milestone changed from Unspecified by Release Team to 0.88

comment:2 Changed 14 years ago by walter

  • Milestone changed from 0.88 to 0.90
  • Priority changed from Unspecified by Maintainer to High

comment:3 Changed 14 years ago by walter

  • Bug Status changed from Unconfirmed to Assigned

(1) Add sliders for gain and bias on sensor input.
(2) Specify more granularity in sample timer.
(3) Double check voltage and resistance calibrations

comment:4 Changed 14 years ago by tonyforster

os140py measure v29 xo-1

unable to select voltage mode, bias is not turned off though display says"sensors DC bias/offset disabled"

log: amixer:unable to find simple control 'V_REFOUT Enable', 0

1700 - 5800 ohms measurement range

comment:5 Changed 14 years ago by walter

I'm about 75% done with a new release of Measure (30) that eliminates all the alsamixer (amixer) calls (tip of the hat to Sascha Silbe). Hopefully it will address this problem as well. I'll be attaching a version for testing soon.

comment:6 Changed 14 years ago by walter

Update: I still haven't managed to sort out the proper settings for data input on the XO...

comment:7 Changed 14 years ago by walter

  • Resolution set to fixed
  • Status changed from new to closed

There is still an unresolved issue regarding some sensors on the XO 1.0 running F11. But by and large, things are working. We can continue to track the calibration issue in ticket #2035

comment:8 Changed 11 years ago by dnarvaez

  • Milestone 0.90 deleted

Milestone 0.90 deleted

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