M-241: Holux M-241 Bluetooth Data Logger GPS (Runs on AA Battery, MTK Chipset, 130,000 Waypoints)

M-241: Holux M-241 Bluetooth Data Logger GPS (Runs on AA Battery, MTK Chipset, 130,000 Waypoints)
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Model Of Item : GPSHLM241 Product Brand : Holux Popular Rating : Reviews Rating : Customer Rating : Product Rating :

M-241: Holux M-241 Bluetooth Data Logger GPS (Runs on AA Battery, MTK Chipset, 130,000 Waypoints) ELECTRONIC SHOP IN US for BEST DEALS PRICES & REVIEW : !!!... 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..../ M-241: Holux M-241 Bluetooth Data Logger GPS (Runs on AA Battery, MTK Chipset, 130,000 Waypoints) / ELECTRONIC SHOP IN US Capable memory size to record up to 130,000 positions, including longitude, latitude, time, and altitude. Built-in MTK Low power consumption GPS chipset. 32 parallel satellite-searching channels for fast acquisition and reacquisition. Low power consumption. Use AA alkaline batteries (or rechargeable batteries) for up to 12 hours of operation. LCD display to show position information, speed, capable logging memory size, date & time. .../ M-241: Holux M-241 Bluetooth Data Logger GPS (Runs on AA Battery, MTK Chipset, 130,000 Waypoints) / ELECTRONIC SHOP IN US M-241: Holux M-241 Bluetooth Data Logger GPS (Runs on AA Battery, MTK Chipset, 130,000 Waypoints) ELECTRONIC SHOP IN US Special for Best Deals Shopping for Customer Review : Royaltek RBT-2300 Vs Holux M-241 Reviewed : M-241: Holux M-241 Bluetooth Data Logger GPS (Runs on AA Battery, MTK Chipset, 130,000 Waypoints) I have two of these units, and have used them for over a year. This review is based on the Holux m241 with firmware v1.13. If you need a data logger or track/distance measurer or want to geotagging digital photos, then take my advice and avoid this unit. Multiple failures resulting in data loss have lead me to start looking for something else. If you just want something to display your coordinates, or connect to a computer then it works well, but you can probably find other units more geared towards those purposes. As a GPS data logger, it is horribly unreliable. My advice, if you already have the unit, is to simply take photos of the Long/Lat screen so you have a sure record. And don't expect its logging feature to work every time. Pros: - The satellite signal is good. Doesn't usually lose its signal when in a car or backpack - Battery life is good (but not enough for a whole day.) - Can be powered by USB, so you can get a USB phone charger (2xAA) to extend the logging time to over 24 hours, or use a USB car charger and not worry about batteries while you're in a car. (These are third party accessories, and don't come with the unit) - Has Bluetooth connectivity if you need it. Can even download your data via Bluetooth. - Will start logging automatically as soon as it receives signal, but only if you set it to do so (Note: was not available in original firmware. Also note: like the device in general, it's unreliable.) - When set to "Dist By: Point", the distance measure mode can be used for simple navigating (e.g. finding your car), although not reliably. See bottom of the review for details. Cons: - No Lock: There's no way to "Lock" the device. If you keep this in your bag or pocket you can accidentally switch it off or press a button, which could stop recording, lose your distance waypoint, or change settings, etc. The buttons are fairly difficult to press accidentally but it's still not something you want to rely on. - No accuracy display. Can never be sure how accurate the coordinates are. - Sometimes needs to be "jump started": power it via USB to turn it on (after that the inserted battery might start working by itself). This has been required at times on both my m241 devices. I tried multiple batteries (they weren't the issue) - Firmware / software is not reliable: The data format stored internally on the device changed between firmware versions (they increased its accuracy, which is good). All well and good, but if you use mismatched software+firmware when you download your coordinates you can end up with corrupted data, and think it was successfully downloaded. Too bad if you wiped your device after downloading the data from it, because your download is corrupt and there's nothing you can do. This happened to me after I used newer software to download the coordinate data from a device with older firmware. Note that I couldn't update the firmware without losing the data on there either, so it would have been a catch-22 even if I had known in advance that it was corrupting my data. I lost several days worth of logs because of this. Really wouldn't have been difficult for Holux's PC software to check the firmware version and deal with both cases. Instead they chose to have the software show success but silently fail. This is really lazy (or stupid) programming. Even if the issue is unlikely to affect me a second time, it increases my distrust in this unit, and I won't be buying anything with "Holux" stamped on it again. - Buggy firmware: certain settings change other un-related settings. To reproduce this bug: Set the device to log by time (15 seconds). Then go into the settings menu and choose "Log Rcd" -> "Full Stop" (which is the default setting, and probably selected already). For no particular reason it will now have now changed back from logging by time (15 seconds) to logging by distance (every 100m). Note also due to the two-button menu system, once you enter the "Log Rcd" menu (e.g. to see what it's set to) then you can't escape out of it without choosing an option. Even by re-selecting the already selected option you end up changing the unrelated "Log by" setting. This makes for a very undependable device, as you can never be sure what your settings are and checking them changes others. I'm not sure if this is an isolated bug or if there are others like it. - Sometimes it simply fails to record coordinates, even though the little "running man" logging icon is shown. I went camping for 4 days, and despite always keeping the thing powered during the day, and supposedly logging, the end result was exactly 0 records recorded. I've been using this thing for well over a year, but since this trip it rarely seems to keep logging (it didn't get wet or damaged in any way). There is no indication as to whether it is working or not unless you keep an eye on the free space screen. By the time you realize that it's not actually doing anything then it's too late. - The distance measure is lost when you switch it off and on or press the right button ("enter"). So forget changing batteries if you want to use this feature and be careful not to knock it. (although the rubber buttons are fairly difficult to press accidentally) - Distance measure ("ruler" mode) doesn't tell you the direction of the reference waypoint. If it did, the device could almost be USEFUL for simple navigation e.g. finding your car (See bottom of review for details on how to do this anyway) As is, this gps is not even as good as an XKCD-407 for navigating, although in a pinch you can use it as such. - Frequent firmware upgrades have been required to fix bugs (e.g. the original firmware gave Northern hemisphere coordinates for the Southern hemisphere). Thank you Holux for fixing the bugs, but it still has a few. - Software is Windows only. - Windows software is not so user friendly. E.g. it forgets the last folder you downloaded to. Another issue is that to upgrade the firmware you have to hit the "disconnect device" button first. This really isn't so intuitive. (And it's very likely that you WILL have to upgrade the firmware, in case you're wondering) - The "Menu" button is also the backlight button. So to turn the backlight on for the current menu/screen, first you have to cycle through ALL the other menus/screens. This is a mere annoyance. (They could have solved the issue by making the first press ONLY turn on the backlight, and the next presses cycle the menu, rather than combine the two) Summary: It can do what it says it does, but don't rely on it to do so, and don't expect a pleasant user experience. ----- How to navigate with this device: When you're at your car/bike/home/campsite, go the "ruler" mode and press "start", then you always know how far away you are. If the distance is going down, then you're getting closer. Up means further. However, this is really unreliable: You can't be sure if a fluctuating distance is just random or genuine (there's no accuracy display). The smallest unit is 10 meters (0.01 km). Also you have to hawkishly watch the display. If the device is switched off even momentarily or if the "enter" button is (accidentally) pressed then the location of your car is forgotten and you're on your own. I do not enjoy navigating with this device, but it's saved me in the past. Note you must have "Dist By: Point" in your settings, and there is no way to tell if that's the mode you're using without going into settings and changing it. Fortunately, it seems you can swap between the two modes at will (by point, by path) without resetting either measurement. I have never been desperate enough to try using triangulation to calculate the direction of my waypoint, although in theory you could do it too. How to do triangulation? This is an exercise for the reader.

M-241: Holux M-241 Bluetooth Data Logger GPS (Runs on AA Battery, MTK Chipset, 130,000 Waypoints) / ELECTRONIC SHOP IN US
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