Isn't most of Sweden small islands? (Lovely country, my wife and I are going to Stockholm in a few weeks).awasen wrote: ↑Mon Sep 18, 2017 5:34 amIf the pumps stop then we won't have any water but it is water used for watering home-gardening, lawns and filling an occasional pool or two so no one is fully dependent on the water. Communal water here in Sweden is not expensive but it is considered a "waste of drinking water" to water your lawn with it so we pump directly from the sea as we have that opportunity and as we are on a small island in the same sea the water (or most of it) will return back to the same sea...
I've been partially controlling my house heating from a Pi B for over three years now. The only time it has caused a problem is when the power has failed. It is still using the original SD card. Current uptime is 172 days. It monitors the temperature in the room and switches a relay wired across the timer switch of the main heating system. This is safe because the heating still has all of its protection circuits in place - it won't go above a certain temperature and will stop working if there are any problems. I'd rather it fail "cold" than explodeWhen you say that the RPi will occasionally "hang/crash". How often would you estimate that happening?
Well, no, Sweden is by most part one big landmass but has many archipelagos of island "clusters". The largest is several thousands of islands (of various size) west of Stockholm called the Stockholm Archipelago. Stockholm itself is made up of islands (14 of them actually).
It is Fresh water. Actually the same sea as where most of the Stockholm region gets their fresh water in the taps from. The water from the lake Mälaren is first filtered through sand beds and then filtered and treated before it comes to our taps. It is among the cleanest water in the world so don't spend your money on bottled water while coming here. The tap water in Stockholm actually has less bacteria and impurities than most bottled waters...
Yes, got a cheap pressure sensor from eBay with 15mm connection. No problem to reboot now and again!Hoagie wrote: ↑Fri Sep 22, 2017 7:17 pmYou don't mention much about the pressure sensors, but as you mention you have a monitor on the Pi, I guess you have that covered anyway. Look on eBay for ADC modules to do the analogue outputs. I'm sure there will be something that can give 0-5V.
As mentioned earlier, the Pi isn't really intended for mission critical operations, but if you don't mind having to re boot it every 6 months or so, you'll be fine. I'd make sure you have a spare SD card cloned from the main one as soon as you get it all working, just in case it gets corrupted.
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