The Holux M and other products you use every day were certainly offered in the manual set. Many instructions, immediately after the purchase, go into the trash along with the box, which is a mistake. Get acquainted with the information concerning the manual for Holux M, which will help you to avoid troubles in the future. If you do not want to read brochures every time concerning a Holux M or other products, it is enough to read them once only - just after buying the device. You will then acquire basic knowledge to maintain Holux M in good operating condition to make it easily reach the intended life cycle. Then you can put away the manual on a shelf and use it again only in a situation where you're not sure whether you perform maintenance of the product appropriately.
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It features a x32 pixel monochrome LCD display with green backlight to show current position and device status. It is manufactured by Holux Technology, Inc. The device is extensively documented in the User Guide, including instructions in use of software to communicate with it. However, the battery may not provide optimal performance and life over the entire temperature range. Further details are discussed in the Firmware section , below. The unit can either start logging automatically, or after pressing the start button.
It shows a little running-man icon on the left side while logging. To store a waypoint while logging, one must be in the menu that displays latitude and longitude. Pressing the Enter button logs the waypoint, and confirms it by briefly displaying a little flag icon in the bottom left corner. The M can log GPS points for up to 12 hours with one alkaline AA cell recommended at room temperature, 10 hours at high temperature or 2 hours at low temperature. An ordinary carbon-zinc cell can power it up to 4 hours at room temperature.
A Ni-MH mAh rechargeable AA cell is specified to power it up to 10 hours at room temperature, and if a mAh cell is used, users have reported up to 12 hours usable life. Frequent activation of the backlight will shorten battery life. Although the M User Manual expressly states that it cannot recharge cells, at least two users have reported success with rechargeable Ni-MH cells.
When the Ni-MH cell is nearly depleted, connect the M with the cell still inside to a USB power-only adapter no data wires and it may begin to get recharged slowly. If you want to try charging a cell while it is in the M, it is recommended to not wait until the battery is depleted: One can charge Ni-MH batteries even with remaining charge, without risk of "memory effect".
Since there is concern with some users about suitable batteries, we can list ones that work well here:. You don't have to use your M device with Bluetooth: You can save batteries by using a USB cable and using the power from your laptop, which should last much longer. To download the tracks with GPSBabel :. To get those, use the script from Saving waypoints with Holux M There is a how-to, Holux M and Arch Linux Archived on , but note that the gpsbabel command-line provided there is not correct anymore.
To download tracks and waypoints, use mtkbabel , making sure you have at least version 0. Use -t for download tracks, -w for waypoints. Mtkbabel creates you a file called XXX. You need to set -s using USB. For Bluetooth, default speed should work. Note that the NMEA Interface Standard specifies serial communication speed at baud, although the M is capable of exceeding this speed when connected to a suitable host.
You can easily send custom commands by editing the source code. See Software hacks , below. Further configuration can also be done by command line switches. See --help. Comment: "Mtkbabel works better for me. It makes a track from every time you switch on the device and you will get the waypoints. I did not get them with gpsbabel. Even if Mtkbabel allows to set higher logging intervals 1 s, 1 m , the firmware seems to overwrite this with the settings from the menu.
BT software works on Linux. See the Microsoft Windows section for general details. Each requires a slightly different setup.
Additionally, since there are various Bluetooth implementations "stacks" , you may have to adjust these instructions for particular software-hardware combination. Have your computer search for Bluetooth devices. Your Bluetooth applications will likely be slightly different. The M should now be connected.
Also, if the battery in the M is dead, you can power it via USB, even while using Bluetooth connectivity. Use Passcode: or no pairing settings and PPSlave. See instructions with screenshots. Obtain the beta version of gpsbabel and type:. Click on one of the start scripts for Mac Os X. If you are not running bash as your shell, you need to modify the scripts, so that the first line reads:. Recent firmware releases as of — are versions 1. You can check the version when you display the "Setting" page.
Firmware 1. Logging these parameters requires a significant share of the device's memory and reduces the capacity of points that can be logged. This release still allows to set specific logging parameters while the device is switched on. In this release, Bluetooth can be switched off, so the device can save power when no Bluetooth is needed, or keep logging in environments where Bluetooth is not allowed, such as in an airliner.
This release still allows one to set specific logging parameters while the device is switched on. This firmware requires GPSBabel 1. Default logging of speed is added, and the internal binary logging format is changed from 16 to 20 bytes per log point, to allow 4 bytes for the speed. It is easy to fiddle with mtkbabel source code to send your own commands to the unit. This is some documentation you can use:.
For a source of ideas of what commands you can send, you can look into the BT source code. There are reports of people managing to set the unit to log 5 points a second and lots of extra information, although 1 point per second is very good already and there should be no need for more. If you manually set the logging rate under 1s, the device will raise it automatically until the next logging starts. The Holux M is not waterproof. If one expects to be inundated or to use it in the rain, it should be enclosed in a waterproof plastic container, a zip-closure polyethylene freezer bag, or a zip-closure vinyl envelope designed for electronics.
The unit is very neatly packed. For low use it can run over a year without any problems. From a daily OSM surveyor, here some experiences:. Comment: Since it is hard to buy a new Holux M in India, I have been patching it, soldering it a few times now.
It is just about 1 year old now. It is very good, and therefore the hard work is worth the effort. Comment: Guess I would qualify as a low user, although I am rather tall. I noticed that the unit will break after "a few falls".
Since I am tall, falling has to be avoided. I got the unit as a gift, without any extras, but I have attached a strap from a digital camera to the above-mentioned top-nose-holes.
This strap I can attach to my clothing. So I can gladly report that the unit has never! And the cap is fine. Still, I am grateful for the hint about the connectors on the little cap wearing out. I do recharge the battery via my USB cable, while I download the tracks. I just leave the unit connected some hours and it has not needed a fresh battery for many weeks now. From OpenStreetMap Wiki.
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HOLUX Technology M-241XX WIRELESS GPS LOGGER User Manual M 241 20071113 EN
It features a x32 pixel monochrome LCD display with green backlight to show current position and device status. It is manufactured by Holux Technology, Inc. The device is extensively documented in the User Guide, including instructions in use of software to communicate with it. However, the battery may not provide optimal performance and life over the entire temperature range. Further details are discussed in the Firmware section , below.
Holux M-241 User Manual