I use something like that second battery to power my pi, it's just a cell phone charger, I'm not sure what running it while plugged in does to it's life. One could put it on a timer so the power cuts, it drains the battery for a while, then charges back up if that was advantageous for battery life...
On Sun, Apr 9, 2017 at 2:39 AM Tom <[email protected]> wrote: > There are probably other USB power banks which can be charged and > discharged together. Here are two examples: > https://www.amazon.com/TeckNet-Universal-16750mAh-Output-PowerZen/dp/B0 > 0FAU7ZB2/ref=pd_cp_107_1?_encoding=UTF8&pd_rd_i=B00FAU7ZB2&pd_rd_r=0JMM > HXMXK7RYWY9K361K&pd_rd_w=712hM&pd_rd_wg=6mOCV&psc=1&refRID=0JMMHXMXK7RY > WY9K361K > <https://www.amazon.com/TeckNet-Universal-16750mAh-Output-PowerZen/dp/B00FAU7ZB2/ref=pd_cp_107_1?_encoding=UTF8&pd_rd_i=B00FAU7ZB2&pd_rd_r=0JMMHXMXK7RYWY9K361K&pd_rd_w=712hM&pd_rd_wg=6mOCV&psc=1&refRID=0JMMHXMXK7RYWY9K361K> > https://www.amazon.com/PowerTitan-19200mAh3-Port-Portable-External-Tech > nology/dp/B01B534D4Y/ref=sr_1_1?s=wireless&srs=5713662011&ie=UTF8&qid=1 > 491729627&sr=1-1 > <https://www.amazon.com/PowerTitan-19200mAh3-Port-Portable-External-Technology/dp/B01B534D4Y/ref=sr_1_1?s=wireless&srs=5713662011&ie=UTF8&qid=1491729627&sr=1-1> > Based on recommendation from this guy: > http://raspi-ups.appspot.com/en/index.jsp He used older model which is > no longer available. > I wonder how smart is the circuit in avoiding the charge/discharge > battery cycles when the power is on - it relates to the battery life. > Tomas > On Sat, 2017-04-08 at 18:57 -0700, Chuck Hast wrote: > > On Sat, Apr 8, 2017 at 3:42 PM, Tom <[email protected]> > > wrote: > > > > > dd nor rsync alone will not be able to do full backup of running > > > computer (RPi). > > > > > > > That was what I figured, just wanted to make sure. > > > > > > > The best course of action is to separate the OS from your data - > > > whatever your RPi is normally writing - then backup each > > > separately. > > > * When you separate the data, you could even store it off the RPi > > > avoiding need for local data backups on RPi altogether. > > > > > > > The drive has two partitions on it /boot and /. /boot is a vfat, the > > rest > > of > > it is ext4. I supposed that I could stop the service (weather data > > capture) > > back up the files that are critical to the weather station.After the > > back up > > is done start the service again. Maybe store them on a jump drive and > > after the station service is back up and running ship them off to the > > location > > I will keep the back ups in. I figure that I could do the back up in > > the wee > > hours of the morning. > > > > > > > * If you want to keep the data on RPi, you could back it up by > > > rsync > > > to separate media (USB) or a network storage > > > * You cannot back up the OS while you are using it - that is why > > > this > > > is normally done on a separate computer. It is easier and faster > > > than > > > booting your RPi from USB or network and then doing the backup. > > > * Perhaps the OS does not need to be backed up often or not at > > > all as > > > you could simply create separate OS image, even on another SD card > > > attached to your Pi. > > > > > > > All I really need for recovery is the WeeWx db file, WeeWx config > > file, > > skins > > file and the nginx configuration. I could actually keep a separate > > image and > > just insert the latest files and quickly swap out the bad SD card. > > That > > should > > take care of it. > > > > I should be able to automate the OS configuration, so that I just run > > a > > script > > it looks for the SD card, installs the OS makes sure that the > > parameters > > that > > I set manually on installation are set correctly, probably can > > automate the > > whole process. > > > > * Your backup target/media could be another SD card connected to > > RPi > > > in a SD card reader, that way you could just swap the cards .... > > > Thinking outside of a box - perhaps you need little UPS for your Pi > > > to > > > avoid regular data corruption altogether. There are some USB > > > charging > > > batteries which can be charged and used both at the same time (most > > > can > > > be either charged or used, not both). Modest battery could keep > > > your > > > Pi running for hours. > > > > > > > I have been looking for a battery pack that will allow me to let it > > float > > on the > > powersupply until power goes away, then it takes over. So far all of > > them > > that > > I have looked at will not switch between charge/float/discharge. I > > have seen > > a couple that plug into the pin field on the RPi, but I am trying to > > keep > > the > > case clean. I have built up a power supply with a battery on it, and > > a heavy > > duty USB dual port power cartridge that supplies the power I need for > > the > > RPi and the WX station console. It is kind of big, I am certainly > > looking > > for > > one of the power pack batteries that does not care if it is being > > charged or > > not. > > > > > > > I hope that this is pointing you in the right direction to your > > > particular circumstances. > > > > > > Yes it confirmed most of what I was already suspecting. Now if I can > > just > > find a nice clean battery pack that meets the above requirement. > _______________________________________________ > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug > _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
