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M-241: Holux M-241 Bluetooth Data Logger GPS (Runs on AA Battery, MTK Chipset, 130,000 Waypoints)
|Price:||$63.95 & FREE Shipping|
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- The Holux M 241 Bluetooth GPS logger provides real time coordinate logging and easy-to-use trip guiding service.
- Holux M-241 is capable to record up to 120,000 records positions, including longitude, latitude, UTC, and height data.
- Besides the logger function, you are also able to enjoy a brand new experience in driving with BluetoothTM
- 51 parallel satellite-searching channels for fast acquisition and reacquisition
- LCD display ( 32 x 8.9mm/128 x 32 pixels) to show position information, speed, capable logging memory size
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|Sold By||Semsons & Co., Inc.||DBROTH||Semsons & Co., Inc.||Spy Tec||Scharf Industries LLC||Optimus Tracking|
|Item Dimensions||6.3 x 9.84 x 2.36 in||4.3 x 5.4 x 1.6 in||—||1.5 x 0.9 x 2.7 in||3.3 x 6.2 x 2.2 in||1.5 x 1 x 3 in|
|Item Weight||1.41 ounces||1 lb||1 lb||0.5 lb||4 ounces||2.5 ounces|
The M-241 is a high performance wireless GPS logger with the following features: # Dual interface (Bluetooth + GPS-mouse by USB cable). # Compatible with Bluetooth Serial Port Profile (SPP) completely. # Powered by one AA battery. # LCD display to show position information, speed, capable logging memory size, date & time. # Capable memory size to record up to 130,000 positions, including longitude, latitude, time, and altitude. # Personal settings to select the logging mode by distance or time, unit by Kilometer or mile, and 3 languages (English, Traditional Chinese, and Simplified Chinese) support.
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The idea here is that the GPS logger periodically records your GPS location and then, later on, the Holux Logger Utility takes this timestamped GPS information and compares it against the JPG timestamps on your photos. Then for each photo, it can find the GPS record that best matches the photo time and add that GPS location information to the photo.
The basic idea works well. The M-241 is sometimes a little awkward to use, but I like mine enough that after I accidentally lost my first one, I quickly bought a second. I use the GPS info for both tagging photos and for generating route maps.
Some specific positives:
* The logger is very compact and easily fits into a pocket.
* The Holux logger utility uploads GPS data as either proprietary TRL files or as Google Earth KML files. The KML files can be easily viewed with Google Earth.
* GPS signal sensitivity is quite good. It can sometimes take several minutes to get an initial fix, especially if you are moving, but it tracks quickly thereafter.
* The LCD display is useful: I enjoy being able to watch things like direction, or speed, or travel distance as I travel.
Now some weaknesses:
* A Duracell Alkaline AA lasts me about 15 hours and a Lithium AA about 22 hours. (Fairly typical battery life for a GPS device.)
* The battery case cover is rather flimsy and needs cautious handling.
* The two button control UI on the logger takes a little getting used to. I can now navigate it quickly, but I initially found it rather frustrating.
* The logger utility UI is distinctly clunky and the manual is rather weak. The UI does the job, but not particularly elegantly.
* You need to keep your camera time synchronized with the logger's time and you need to compensate for timezone differences when you do the photo tagging.
You can use either USB or Bluetooth to communicate with the logger. I've been using USB on Vista, without any problems. I can't speak to the Bluetooth functionality.
* Make sure to download the latest firmware and logger utility from the Holux website. The latest versions have bug fixes and some feature additions.
* In the logger settings, turn "AutoLog" to "on". This means it will start logging as soon as it gets a GPS fix, and you don't have to remember to separately turn on logging.
* Rather than worrying about time zones, I ended up leaving my camera permanently in UTC+0 (GMT). The logger always writes its TRL records in UTC+0, so this means I can tag photos without having to specify a timezone adjustment.
* By default, the logger logs every 5 seconds. I moved it to every 30 seconds, which I find adequate for photo location and lets me store over a month of records.
* If you're using USB, it's worth turning off the Bluetooth radio to save power. (This is a new feature in the v1.12 firmware.)
Overall, this isn't perfect, but I find it very convenient as a lightweight tool for GPS and photo logging.
There are many reviews and YouTube videos of this product and I had been looking at it for a long time. The only issue that I had to comprmize on was the readout of the latitude and longitude. I would like it to readout in decimal degrees but it uses degrees, minutes, and seconds. This cannot be changed for display on the LCD but there is an option when using the data to select your choice.
Also, I would recommend downloading the most recent software and reading the manuals. One review I read indicated that the unit did not capture waypoints but it does. One person also indicated that there was no locking feature for the inadvertent button push but there is.
I did not want a big heavy unit like my Garmin, I wanted a small light unit that I could wear around my neck in the field and log routs, take waypoints, and even take a picture of the readout if I wanted to. And even the lanyard that comes with it is top notch. The driver for reading the unit installed without any issues and I like the simplicity of the HoluxLoggerUtility. The price was also a deciding factor... Joe
NOTE: I've been using this device on and of since 2010 and am not disapointed. However, after it setting around for a while and replacing the battery I did notice a change in the settings. I very much like the "AUTO LOGGING" function, that is it starts logging when you turn it on. The default is that it doesn't. Forgot to set this setting and missed an etire trip. It just seems extremly dificult to remember to TURN LOGGING ON:-)
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