Download a file from controller using HMI

Comments

• Oleksandr Guminskiy

  July 2023 edited July 2023

  Hello!

  1) I did'n test it in prod, but if you store copy of your backup file in

  "/opt/plcnext/projects/PCWE/Services/Ehmi/ehmi/param.csv" (one of points where plcnext store support files configured in project). Than you can access your param.csv file via button on hmi without reconf of nginx. Be aware, file in this folder will be deleted, if you download new project.

  This is one of variants.

  

  2) Upload file to server seems to be impossible in unsafe manner. You have to use scp client and verification to deal with this task. If you dig into nginx configuration, perhaps, it can be solved in some approach. But native ehmi dynamic actions does not have upload functional.

  Best regards
• Oliver PLCnext Team

  July 2023

  Hello,

  by default the ehmi does not support File upload and download.

  Downloads can be achieved like Oleksandr suggested or by adding a nginx configuration for file upload.

  See this for reference:

  Forum - PLCnext Community (plcnext-community.net)

  Then this path can be added in the command URL used via eHMI Button to get a download.

  I dont think uploading the parameters through this option is to be recommended as this is not password protected.

  
  

  I will forward this request to the eHMI product management.

  best regards,

  Oliver
• [Deleted User]

  July 2023

  Appreciate your help Oliver and Oleksand.

  To avoid file deletion when download new project I have edited nginx.conf, as Oliver suggested. I also add a line to automatically download the file. I added this to the "nginx.conf":

          location /conf {
              alias /opt/plcnext/BeeFiles;
              add_header Content-Disposition "attachment; filename=HMI_config.csv";
          }
  

  Then I added the dynamic to the button:

  

  
  

  
  

  
  

  
  

  
  

  Please let me know if you create the function to load parameters from HMI.

  Regards,