Debug code that works great on arduino nano but crashes after a few hours on attiny85

hi there, I suppose this is for a 3unit battery charger project you're building this? well anyway, I might have some suggestions if you award me the project on how this can be dealt with. also please forward the AT command sheet being used, so that I understand the memory requirements for the replies. As well please send the serial output before the system crashes thank-you! hope you need my assistance and I ll help finish it

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Dear Sir, I can do this project. I can assure you that if you work with me once, you will always work with me for these kind of projects. Thanks

Hi, I am keen to inspect your code. My first guess would be timer issues. I would like to know what you mean by "crashes", does it restart or does it stay locked in an unknown state? I might have a solution but I need more details. feel free to contact me, Gabriel

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The problem is the RAM space, you are filling up RAM by your variables through your while loop...ATTINY85 got low RAM space than ATMEGA328p/pu...

I have debugged to you code. There is a lot difference in arduino uno and attiny. I can definitely do this work for you. I have experience working in industries like TATA Steel as an intern.