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diy solar

diy solar

Getting Data DIRECTLY from a Tigo TAP - is it possible ?

I think I saw somebody mentioning you could flash the old firmware using serial port or jtag. When I opened the unit, I saw what looked like the contacts for the serial port. Can't say anything above and beyond that. If you happen to get access to the file system somehow, I can help you modify local files to enable ssh, but that's quite a big "if"
Could you refer me to the posts where someone might have flashed the old firmware? Seems like quite a few feature they are hiding - for example the automatic rapid shutdown, I am going to use my system as just an emergency backup but the circuit the tigo cca is on is not part of that in my load panel so effectively I am finding out I have to ask them to remove this feature remotely but have read other had the ability to manipulate locally. Either way I would be open to trying to downgrade the firmware as worst case I will just replace the CCA if I brick it.

Thanks for the quick reply btw!
 
Could you refer me to the posts where someone might have flashed the old firmware? Seems like quite a few feature they are hiding - for example the automatic rapid shutdown, I am going to use my system as just an emergency backup but the circuit the tigo cca is on is not part of that in my load panel so effectively I am finding out I have to ask them to remove this feature remotely but have read other had the ability to manipulate locally. Either way I would be open to trying to downgrade the firmware as worst case I will just replace the CCA if I brick it.

Thanks for the quick reply btw!
There's been a long thread on some German forum referenced here. It's somewhere in it, but I can't point out exactly where. I don't speak German, had to translate and thread is very long, so you'll have to do the digging yourself
 
Here's the image of my board out of case. I circled what might be the candidates for serial port and/or JTAG.

If you figure out how to downgrade firmware, I could document how to disable upgrades. Also, you may want to cross-compile dropbear, the one they have only supports ciphers so ancient, that you can't even use them by default on modern linux, must supply extra switches to convince it to connect. And there's processes which would regularly kill said dropbear, so you may want to give it a different name, but you can't with default one due to some compilation quirk. Long story short, you don't want their dropbear, it sucks.

1736693111836.png
 
Has anyone gotten that TapTap program working with the waveshare rs485 to wifi module?

What settings need to be used on it?
 
So... I am currently able to SSH into my tigo. I wrote a c++ program to locate the statistics, parse it, and push current power per-panel to the MQTT server. This program can be compiled for armv5, and be scheduled to run directly from tigo unit.

From there, home assistant can collect the values, like so (these are indeed in W, I have a bit of a cloudy day right now):
1738605406554.png

Question: is anybody here interested in me cleaning it up for greater audience and publishing it on github?
 
So... I am currently able to SSH into my tigo. I wrote a c++ program to locate the statistics, parse it, and push current power per-panel to the MQTT server. This program can be compiled for armv5, and be scheduled to run directly from tigo unit.

From there, home assistant can collect the values, like so (these are indeed in W, I have a bit of a cloudy day right now):
View attachment 275361

Question: is anybody here interested in me cleaning it up for greater audience and publishing it on github?
I would definitely be interested.... if I could regain ssh access. I messed up my isolation on my old router and got bumped to 3.7.9.

Also, it seems like if the device doesn't push to the cloud every so often, it fills up some sort of internal storage and stops reporting new data. Have you seen this behavior?
 

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