B4R Question Suggestion of idea on how to make a backup

Rather than trying to store the parameters in a directory, you might consider storing them in a database on a hosted server.

This write-up describes storing records on a hosted server in order to sync device database records but your application would be very similar in that each device would have a unique Id and each parameter could have unique Id and therefore record.


Your front-end app would send the parameters as often as you wish. You could write the php database logic to create a new record or update it if it exists.
If a parameter changes in your front-end app, you could just send the one record, not all of the records.
The front-end app could also query the server database in order to refresh the parameters if needed, especially if the device hardware was changed out.

A 2nd front end app could be written in B4J or B4A to display all of the devices and allow them to be clicked or touched and then the parameters for that device would be displayed. You might want a third front end app for yourself to build the db table.

The models and actual logic for all of these ideas are in the above writeup.

My own hosted server from 1&1 Ionos is only $12.32/month so it is very affordable for most any company.

Handling a sql data base on a server will be a lot easier than trying to send whole files to another server.

Hope this might help.
Cliff McKibbin

As I mentioned, the server belongs to my client and I don't have access to it. At most, it allows me to upload a PHP script to make the POST work from the ESP32. So trying to set up a database is impossible.

Does anyone have any experience uploading files with POST from an ESP32?
I'm having some problems of all kinds and I don't know if it's the ESP32 code or the PHP script code.

Some example would be appreciated.

Thank you very much.

Gerardo Tenreiro said:

Does anyone have any experience uploading files with POST from an ESP32?

Click to expand...

.no idea if this will help you read section 2.1 the PHP or HTML principles, I think, are there
You will have to, probably, do some experiments for your purposes. Rui has McroPython examples too. It's a good site for ESP etc..

Thank you very much

I am working more or less on the same path, so this information will be very useful to me

Thanks