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Connecting a digital (LCD/LED) screen


brf11 May 2, 2021 03:52 PM

I want to install a external screen that will be visible to trail users and students as they walk by the gaging station they will be able to look at a screen to see what the measured values are currenly. Is this possible? Any other ideas? CR1000, CTD-10, TE-525, CS-215, and Stevens Soil Moisture sensors. Thanks


Nico May 2, 2021 10:27 PM

You don't say what com/control ports on your CR1000 is still available and what you are comfortable to deal with (building your own display or wanting to buy an off-the-shelf solution).

Have you seen this (afaik uses the/a RS232 port)?: https://www.campbellsci.com.au/cd295


smile May 3, 2021 03:23 AM

Hi,

you could also use a WIFI or bluetooth adapter on logger and with one or many smartphones use the free LOGGERLINK app.


brf11 May 3, 2021 05:24 AM

Thanks. Looking for other solutions. The problem with the CD295 is it isn't compatible with CR1000X loggers (in case we need to move or upgrate to that later). I am looking for ideas so what I am comfortable with isn't a factor.

Loggerlink works ok sometimes. Would also require every visitor to know prior to visit to download app. They would also have to know how to connect to view. We just want users to be able to see what the values are.

Thanks again


Nico May 3, 2021 06:23 AM

I am looking for ideas so what I am comfortable with isn't a factor.

You didn't answer what ports you got left for this.

Also, I have been involved in enough projects where people told me they are happy to deal with fir example a Raspberry Pi and do some programming to get it to where they want it to be, because they "have worked with them before and know what they're doing" to the thing just falling apart because they actually didn't know what they were doing or overestimated their capbilities.
So again.. what is your comfortability level to get this off the ground?
You want off the shelf or do you have the means and time to go it on your own (or employ people do do it for you).. or anything between?

A very simple solution would be to drive a RS232 LCD display.
But it would require you to program your logger to send the correct characters and controls to that display.. in CRbasic. Can you do that? Are you willing to do that?
Do you have a RS232 port free on your CR1000?

Example: https://www.crystalfontz.com/products/

Also, how many values, and what type of values are we talking about?
Or do you even envision graphs with historical data reaching back how far.. minutes? hours? days?

JFYI - everything I did in the area of "visitor displays" so far involved a windows machine running loggernet, downloading the data and then python scripts running the display for either web or local screen purposes (because what Loggernets own RTMC is capable off is just plain ugly).


GaryTRoberts May 3, 2021 06:33 AM

If the logger has and TCP/IP interface your vistors can reach, you can create a display in RTMC (or RTMC Pro) and upload it to the datalogger. The datalogger can act as a web server and display the RTMC project. Putting a NL241 on the datalogger can also make this easy to do. Customer's will just connect to the NL241 network ID and it will display the logger's RTMC project page on their phones or a Wifi table that you peminalty place there. You can also create your own webpages on the logger (because RTMC might not be pretty enough) using WebPageBegin/WebPageEnd/HTTPOut and the Logger API.


pokeeffe May 3, 2021 11:59 AM

The CR1000KD costs less than the CD295 and is compatible with CR1000X. It's got 8 display lines and you can hide the system menu if you desire to expose the buttons to allow scrolling or backlight activation.


JDavis May 5, 2021 10:33 AM

The CD295 does not have official support for the CR1000X, because the configuration software does not support reading in CR1000X program files. You can make a CR1000 program with the exact same variable names, and use that to configure a CD295. If the variable names and Pakbus address of the CR1000X are correct, the CD295 will function.

If using a serial LCD display, look for one that can take simple ASCII commands. The programming will be a lot easier than one which requires binary commands. 

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