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Forum Index : Microcontroller and PC projects : MKII and Data logging
| Author | Message | ||||
atmega8 Guru  Joined: 19/11/2013 Location: GermanyPosts: 712 |
Hi, i want to use the MK II for a temperature data logging project. I would like to read the logged Data directly with a PC. The MK II can not be moved to the PC and vice versa. A SD Card would be perfect, but the MK II doesnt Support a Filesystem like the Maximite. Has anyone out there a good idea how i can write Data to a device like an SD card. That can be plugged into a PC to read the logged Data? THX in advance. |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 8605 |
Openlog |
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| plasma Guru Joined: 08/04/2012 Location: GermanyPosts: 437 |
maybe you can use an esp8266 to send the log to a server , cheaper as openlog or create an acesspoint with the esp and transfer the data to your handy and from handy to pc .. |
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| atmega8 Guru Joined: 19/11/2013 Location: GermanyPosts: 712 |
No WLAN possible....😞 |
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palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1805 |
What about a wireless module. Would that work. Paul. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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| atmega8 Guru Joined: 19/11/2013 Location: GermanyPosts: 712 |
No Wireless possible. It must run stand alone / autark.. |
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| plasma Guru Joined: 08/04/2012 Location: GermanyPosts: 437 |
no problem , the esp create an accespoint for you , chime in with your handy , download the data and go to to your pc and connect it over wlan (easy) or usb ( a little bit moore complicated) also bluetooth is working. |
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Grogster Admin Group  Joined: 31/12/2012 Location: New ZealandPosts: 9082 |
As matherp suggested, use an OpenLOG module. Not exactly the cheapest module in the world, but it is quick, easy, and it works right out of the box. What's nice about this module, is you just throw data at it using a serial connection(the default is 9600,8N1), and it sucks anything you send it in and saves it on the uSD card for you as a 8-dot-3 type file on a FAT16 filesystem - dead easy to read back from any PC, or, indeed, Mac or Linux system too. So long as you don't need more then one or maybe two, this is probably the best(read: most simple way to add an SD card for logging) way forward. Smoke makes things work. When the smoke gets out, it stops! |
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| atmega8 Guru Joined: 19/11/2013 Location: GermanyPosts: 712 |
Hi, meanwhile i found an article in the elektor. They use a Pic PIC24FJ64GB002-I/SP and a USB Stick. Works the same way like openlog. It is simple to solder and Source / Hexcode is available. Will cost max. 5 Bugs., PIC, Quarz, some chickenfood, ready. If there is any interest, PM . Elektor 12/2011 Page 34 All necessary programs and software libraries are available free of charge and the firmware source files can be downloaded at no cost from the Elektor project web site [1]. The firmware can be programmed into the data logger microcontroller using a PICkit 3 for example. A pre-programmer microcontroller can also be purchased from the project website [1] which should help speed up construction even more. www.elektor.com/110409 |
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kiiid Guru Joined: 11/05/2013 Location: United KingdomPosts: 671 |
Probably a perfect fit for one of my offers ? A through-hole plcc socket has 2.54mm pitch and is dead easy to solder anywhere. http://rittle.org -------------- |
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| cwilt Senior Member  Joined: 20/03/2012 Location: United StatesPosts: 147 |
Does the mkII do something that you can not do on a maximite? I know it has direct access to some sensors that the maxi does not but you did not say that in your first post. There are more than a few different maximite alternatives, like kiid's, that can give you mmbasic and SD filesystem. |
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| atmega8 Guru Joined: 19/11/2013 Location: GermanyPosts: 712 |
Well what would be fine is both, the support of all the external devices that MK II supports and the Filesystem Support the Maximite has, combined with a simple chip in DIL Format like the MX 170. Today is Christma, let' s see what Santa Claus will bring to us;-). Merry Christmas to all Forum visitors.  |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9082 |
Frohe Weihnachten! (Merry Christmas) Once you start adding filesystem support to a microcontroller, it is no longer a microcontroller, IMHO. Adding support for a native filesystem to the Micromite, would take up large amounts of memory, me thinks, and not THAT many people would use it on an embedded platform. Most data logging or reading at MCU level, can be done with FRAM chips. That said, this is EXACTLY why things like the OpenLog exist - dead easy to add to an existing MCU, if you need to be able to save data in a form that a big computer needs to read. Smoke makes things work. When the smoke gets out, it stops! |
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| atmega8 Guru Joined: 19/11/2013 Location: GermanyPosts: 712 |
Hey cool, openlog is well documented and kind of open Source. So you can build your own/DIY;-). They are relative expansive, cost 20-25 Dollars. Didn't find cheaper ones in the Bay, the Chinese guys are still sleeping..... Any cheaper found? Merrry XMas to all of you 🎅 |
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Zonker Guru Joined: 18/08/2012 Location: United StatesPosts: 761 |
Possibly a job for the DIP-600-28 uMite board... 
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| viscomjim Guru Joined: 08/01/2014 Location: United StatesPosts: 925 |
Hi Zonker, sorry if this has been asked before, what is the pricing and availability of your awesome board, and which fram did you wind up using? Thanks and Merry Christmas!!! |
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| Zonker Guru Joined: 18/08/2012 Location: United StatesPosts: 761 |
Merry Christmas Jim...! Just got done programming 11 of these last night... Lou did an awesome job soldering up the rest of the batch of 21 prototypes... It's a bit pricey at $30 but we got the parts from Digikey so that should be about the "high" price... I am sure they could be built for cheaper... We will probably be sending a few to Phil to have a look at... I guess I could sell a few for the moment.... I will be putting in a simple test program that tests the RTC and Fram chip for the user... I went in to the FTDI chip and reprogramed the tables to allow 200ma of Vbus power so you can power your whole setup from the board... Also made the little blue LED flash during Rx-Tx transfers.... Fram chip is the FM1256-G 2014-12-25_154040_DIP-600-28_DigiKey_BOM.zip Edit: Fram "chip shot"... 
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| atmega8 Guru Joined: 19/11/2013 Location: GermanyPosts: 712 |
Ordered today 2 of the "Original" openlog devices for approx 10€/ pice via ebay. Can't do IT cheaper by DIY.... |
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