Which cloud-local solution for data collection:domoticz/thinspeak?

I have a couple of projects that I've partly done, am doing, will be doing based on Arduino, but I'm increasingly fond of ESP8266/ESP32, so in the context of that I'm asking:
1. home improvements, i.e. typical IoT,
2. collecting voltage measurements from a dozen or more 12V batteries
3. Ongoing supervision and monitoring of the parameters of the portable battery charger(s).

So far with the help of the Arduin (ad 2 and 3) I have been doing attempts to collect data on an SD card, but I am expanding the system and have some first attempts with Blynk. Since in the absence of Net, this would stop working, I'm considering looking into something I can install locally on some Malinka and here the search engine mostly gives Domoticz, and if Domoticz and ESP8266, then ESPEasy. Meanwhile I'd rather stay with C/C++/ArduinoIDE or something similar. I don't want to learn Lua, or even less EspEasy.

Please advise, is it better to learn Domoticz and communicate with it via JONSON (another thing to learn), or to collect a dozen data for my own server, are there other better solutions?

I heard something about thingspeak - maybe that would be better?

JanuszKornas wrote:

I have some first attempts with Blynk. Because in the absence of Net, it would stop working

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The Blynk server can also be set up locally:
https://github.com/blynkkk/blynk-server#blynk-server
Also on a malinka:
https://diyprojects.io/blynk-how-to-install-a...limited-energy-test-wemos-dht22/#.XSXa1Y_gqCo

In this type of solution, the main problem is not the collection of data itself, but its visualisation and possible notification of e.g. alarms. Consider what your requirements are in this respect and see if any ready-made software meets them.

khoam wrote:

The Blynk server can also be set up locally:

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I haven't read it yet, but maybe you know: The Blynk app on the smartphone has a certain level of 2000 units which are consumed as I add more items to the visualisation on the phone. If I put the Blynk on a localhost, will the app on the phone also eat up these units?

And, in order to push myself from ESP to Domoticz programming in C/C++/Arduino IDE, do I need to learn JONSON, as I haven't seen libraries, any ready-made ones? Did I write correctly that C/C++ and JONSON are enough to send/receive data from Domoticz?

I have this configuration:
Management server - Domoticz
In addition, data from Domoticz goes to Influxdb and then to Grafana to have beautiful graphs.
Not only ESPEasy works with the ESP8266, but also Tasmota and Espurna and Arduino. Plus NodeRed to get something that can't otherwise be done in an easier way.
Current measurement sensors could be PZEM-004 or sonoff pow for example, or possibly stc-013.
I use the stc-013 with the Esp32 to measure the current throughout the house, with data every 10 seconds flying to the Influxdb.
In addition, there is still lighting via sonoff touch on Tasmota and via Node-Red voice control via Google Home mini.

JanuszKornas wrote:

The Blynk app on the smartphone has a set level of 2000 units which are consumed as I add more items to the visualisation on the phone. If I put the Blynk on a localhost, will the app on the phone also eat up these units?

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Do you mean the so-called energy units? If so, you define yourself in your local Blynk server how many of these units it will have. For example, you can set yourself that you have one million such units .

For graphs you can have this, although I confess I haven't run it yet
https://play.grafana.org/d/vmie2cmWz/bar-gauge?orgId=1&refresh=10s

You can have blynk locally and a truncated blynk on a remote server with basic information
here is some description

https://blynk.pl/auth-token-czyli-jak-zaadresowac-przesylke-w-blynk/

khoam wrote:

JanuszKornas wrote:

The Blynk app on the smartphone has a set level of 2000 units which are consumed as it adds more items to the visualisation on the phone. If I put the Blynk on a localhost, will the app on the phone also eat up these units?

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Do you mean the so-called energy units? If so, you define yourself in your local Blynk server how many of these units it will have. You can, for example, set yourself that you have one million such units

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Unfortunately, there are many indications that it will no longer be possible to install a private local server in the next version of Blynk. As a consolation, energy units will be free of charge if the project is non-commercial i.e. only for your personal use.

Quote:

Unfortunately, there are many indications that it will no longer be possible to install a private local server in the next version of Blynk.

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Do you have any information on this more accurately?, possibly you can use an older version as it happens.

oskar777 wrote:

Do you have any information on this more accurately?, possibly you can use an older version as it happens.

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There's a separate thread about this on community.blynk.cc - 3/4 of the posts are rubbish, but there are also so-called "leaks".
Link: https://community.blynk.cc/t/new-version-of-blynk-platform-sign-up-for-beta/37617