Logging Data to an SD card

[moelski]

Hi @all,

today I want to show you my latest developement with / for ESPEasy ... You may have noticed that I have done a new plugin for the SPI adapter MAX6675 / MAX31855. After I finished the plugin I thought it could be nice to add a SD card interface since it uses also the SPI interface.

After some grabbing in my components I found an adapter from CATALEX. See the pictures in the attachement. It´s connected with 5V, GND and SPI.

It needs some SPI additions in ESPEasy (which I hope will be merged ... ) to get the SD card working.
But after 3-4h of testing it´s working

Now you may ask why we need a SD card controller if we can send the data wireless ... Well there are situations where logging to the network is not the best option.
Think about time limited loggings or loggings at places where you don´t have access to your network.

Anyway I think this could be a great addition to ESPEasy. If someone is interested in this plugin I can add it to the Playground.

Find attached some pictures and a sample file.

[stefbo]

Hi Dominik,
this is something I was also thinking about. I would be very interested in your code. I ordered a SD-card interface some days ago. As soon as it arrives I will go testing
Stefan

[moelski]

Hi Stefan,
I can add the code as soon as I have finished it.
What you see here in the post was the first working example
So I need to implement some settings and then you can give it a try.

Oh and you need the R134 from GIT because it includes the basic SPI configuration / Init.

[moelski]

Work in progress

I just want to show you the settings page for the SD Carc Controller Plugin.
Now there are some file handling and IF conditions left to be coded

If you have any missing additions please let me know ...

[JR01]

Very very very cool, well done. Will for sure use it.

[timsson]

cool!
maybe file save or sendto....

[moelski]

maybe file save or sendto....

great idea

But first let me finish the "normal" SD Card writing. I think it will be done this weekend.

And then I thought it could be cool to have a very small kind of file browser.
With a limited set of options:
* single file delete
* File download
* File View
* create / delete Directory
* maybe file move

But I have to think about that first. Have no idea at the moment where to place such peace of candy .. sorry code

[moelski]

Hi @all,

I have just finished the Controller. It was more work then i expected before
Anyway it´s done and now I will do some tests this night.

Can upload it tomorrow here as code or I place a pull request in the ESPEasy repo.

[JR01]

+1 !

[moelski]

Hi !

I added a pull request for the new controller.
https://github.com/ESP8266nu/ESPEasy/pull/83

Let´s see if it is ok for the devs

[pm_cz]

So if I understand correctly from the code, you may either send data to some server or write them to SD card but not both at the same time? I guess there is a reason why it has not been possible to implement is as an output plugin (like _P012_LCD.ino or _P023_OLED.ino). It would be interesting if you could share it since I was playing with the idea of SD plugin myself.

[moelski]

So if I understand correctly from the code, you may either send data to some server or write them to SD card but not both at the same time?

Correct. This is a controller plugin. So you can use it like MQTT or FHEM. Nut as per default ESPEasy can handle only one controller at a time.

I guess there is a reason why it has not been possible to implement is as an output plugin

It would be possible to use this as an output plugin. But the problem is that you have to check all the configured sensors when you wan´t to write a value to the SD card.
And you can´t use the default sensor delays in an output - because they won´t get triggered.

It would be interesting if you could share it since I was playing with the idea of SD plugin myself.

Take a look at the github pull request. If the devs find it ok - maybe you can donwload it directly in R137 ...

[pm_cz]

It would be interesting if you could share it since I was playing with the idea of SD plugin myself.

Take a look at the github pull request. If the devs find it ok - maybe you can donwload it directly in R137 ...

Sorry for misuderstanding, what I meant here was that I wanted to know the reason why not use the output plugin way. I did look into the diffs when you anounced the pull request. It seems that the best way would be to allow multiple output plugins, but this would probably mean rewriting quite a lot of the code, or to integrate the SD output in another way.

We will see what martinus thinks soon anyway...

Regards,
Pavel

[moelski]

what I meant here was that I wanted to know the reason why not use the output plugin way

I told you why ...

But the problem is that you have to check all the configured sensors when you wan´t to write a value to the SD card.
And you can´t use the default sensor delays in an output - because they won´t get triggered.

[timsson]

... for me nearly perfect in a standalone network without openhab!
I use the wemos mini with sdboard...
perhaps a possibility to reading the files?
Thanks al lot

[moelski]

Hi !

perhaps a possibility to reading the files?

Where do you want to read a file? In ESPEasy?
For which reason?

[timsson]

Where do you want to read a file? In ESPEasy?
For which reason?

no, the best way for me, file download from ESPEasy someway
why? - because i can't remove my sd-card - its in a case...
Thanks

[joshi]

Hi,
this logging feature is exactly what I need - thanks a lot. But where I can find it ? It has not been added to the latest releases and I was not able to find it in the playground.
May I ask a kind soul for guidance ?
TIA
Joshi

[5ko]

+1
Regards

[Drum]

Hi !

perhaps a possibility to reading the files?

Where do you want to read a file? In ESPEasy?
For which reason?

Reading a file to upgrade the firmware without a wifi connection would be a nice feature, for a remote datalogger. Maybe update settings via "restore" from file as well.
If using as a remote data logger you could also disable the wifi and save power, unless you are war-walking.....