| Products > Test Equipment |
| External Display for Agilent 34401A (or any DMM with RS232 Output Stream) |
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| quantumvolt:
Thanks. Very good. Looks very Arduino-friendly. So since I am a newbie to it I will start by transmitting BT from the DMM and receive it with an Arduino board with a BT Shield and a 3.2" TFT (USD12 - I have one). Than I have the wireless part tested out on the simple and cheap. And the robot link for using the tablet also seems to be my kind of thing - a large group of madmen and nerds who willingly share and help. Thanks again. You made my day. Project redefined. F#kk da Null-Modem-Cable! To all of you who have substancial knowledge and info: If there is more, keep it coming :D |
| TiN:
Might need FPGA for 10" TFT tho :) But for sure, it can be a nice addon for benchtable, specially if make it support few interfaces like GPIB/RS232, add support of different tools. Maybe even make open project so contributors can add their own support for needed tools :) LabView is nice starting point too, it have already lots of libraries for existing equipment and can be used as a backbone. ;) |
| Harvs:
Sure ok, fair point that people often swing terms around. The hard part about this one isn't anything to do with the bluetooth etc, it's getting to know android development enough to make a decent app. The upside to that is there's an absolute abundance of high quality tutorials on youtube to get you started, and if you get stuck there's a 99.9% chance someone has asked the same question on stackoverflow. It makes the size of the arduino community pale into insignificance comparatively. So as alm suggested, you can just grab any bluetooth module that supports serial protocol and wire it in with a RS232 level converter. Or, you can spend a bit more money and get it complete like: http://www.ebay.com/itm/Bluetooth-to-Serial-Adapter-BTLink-Bluetooth-RS232-Class1-100m-BT232-EXT-/221309255366 By hooking that up, now grab a PC with bluetooth (e.g. most laptops these days) you should now be able to pair with it, fire up a terminal program and talk to the meter just like it was connected with a serial port (i.e. the bluetooth module will look just like another comm port.) There's really no need to be bothered with arduino test programs unless you really want to. So with that done and tested, it's over to learning to make android apps. Bluetooth is handled with sockets on Android, this may seem a bit complicated at first to set up, but it's not too bad. However, once you get the hang of using sockets on android, you'll be pleased to know that communicating via wifi is almost the same so it's worth learning. The google android developer docs are very thorough, but sometimes can leave you wondering where to start. At that point, best bet is to look at someone elses tutorial/project, however always do that while referring back to the google docs for what each command is doing. I've often found that so called tutorials out there have been written by someone who has got it working, yet has little idea themselves as to why. I'm kind of busy at the moment as I have a class to teach tomorrow at my hackerspace, but if I get the chance I'll write a small app that'll help you get started. |
| sprocket:
Interesting project. I'll be following it and see how it goes for you as I have a similar project in mind that I'm in the starting phase of. Though mine is not a multimeter, but a tuchscreen interface for a 15V/30A liniar lab PSU. |
| quantumvolt:
Thanks again. The info from alm and harvs is enough. I don't need real spoon feeding ::). The BT part seems easy - just need some cash for the 2 BT devices. The plug w. antenna and an Arduino BT shield (I want one even if I don't need it) is on my budget. And the Bluetooth Serial Port Profile is almost universal. Very good. I just wanted to be sure I didn't repeat my helpless first RS232 job (but I succeeded). I left electronics when crystal radios, tubes and Germanium transistors was all I could afford (mid 1960s), and started up again a few months ago. And in those months I have also gone from my former university programming in FORTRAN on VAC Punchcards to C++ on Arduino, AVR (studio) and now ARM M3. All good. Here is my RS232 debut (I didn't even have a cable or level shifter): Thanks again, all. I'll be back when I have the BT hardware. |
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