Hey @dysprosium, are you using any sort of heatsink? Notice the two of them I am using on picture. I tested for a week, with 4 cores (100%) utilization, no troubles so far. As for the read more, it was related to what will be served once user logins and will lead to gridcoin.us
Do you think i should go with better solution when it comes to heat? Also note, most of the devices will be placed outdoor.
I know summers in Belgrad might get very hot, especially when the Raspy will be placed in a sunny but station. How do you take care of that?
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Its possible to set temp_limit in the boot file, that should throttle the CPU down
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makes sense, will look into it as possible solution, rather then writing kind of watchdog script.
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Its actually at:
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Something like this should be safe enough in your opinion? I found this value is set to 85 if omitted.
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Yeah 50 is quite low, mine is 80 on my Pi3, check to see if it throttles the cpu, you can use
and
To see how your temps / cpu clock is working
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That would complete the thing. Each device will pull the config from server once in hour, check the md5 sum, and if differs perform a restart.
The centralized PRTG monitor will fetch details of all devices including the temperature and throw an alarm with location of any device above usual.
So far, everything behaves normally even with most extreme loads, but I guess the real test is going to be during summer.
Thanks for the params, very useful both for monitoring and throttling! Very helpful.
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I hate those wifi "guest pages" that hijack your dns/http. It once downloaded that welcome page as package update and messed up my package manager. But I understand that those are required for legal things.
To the heat issue: is it necessary to cool that second smaller chip? It is only ethernet + usb adapter.
Also when crunching with, the SD-Card might wear out sooner. Consider tuning, boinc or the filesystem parameters to reduce writes. sysctl vm.block_dump might provide information on what is causing writes to the storage.
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Agree about guest pages, (as long they don't require installing self signed certificates that are later used for https inspection) - happened to me once in a nice hotel doing not so nice things. But as you said, this will be a simple disclaimer and an opportunity for user to known more about "City & GridCoin Sponsored Wifi", which could be a good read while waiting for a buss.
As for the cooling, I was unsure at the moment of order. But since the LAN chip is going to be active all the time - connected to Raven Airlink Device via ethernet, i was thinking it's a good idea. Anyhow, it should not hurt.
SD-Card issue, good point, I did not think about that. Will test it under heavy load and try to calculate how much it could be expected in terms of durability.
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