Thanks to all concerned for trouble-free installation of complete system emontx3 raspberryPi posting results to emoncms.
What are the consequences of making the file system read write?
It could then be more useful for other tasks since uploading a few numbers to emoncms every ten seconds cannot tax it much.
Re: read only RaspberryPi OS
Do I understand that you want to be able to write occasionally to the SD card, or do you want to write continually every 10 s? If the latter, you can expect the SD card to fail after "short" time. You need to check the forums for the definition of short, it can be from a few weeks to some months. The whole purpose behind making file system on the SD card read-only was to avoid premature card failure.
Re: read only RaspberryPi OS
See our blog post's on the read-only FS: http://openenergymonitor.blogspot.com/2013/09/raspberrypi-sd-cards-hdd-gateway.html
And using the Pi with a HDD: http://openenergymonitor.blogspot.com/2013/12/setup-emoncms-on-raspberrypi-with-hard.html
Re: read only RaspberryPi OS
thanks for that. To clarify, no I would not wish to write the sample data to the SD card every epoch but I would like to do things that require writing to the SD card without necessarily having to make the partition read/write every time. One such thing was of course to add myself as a user and change the root password.
I am considering putting LAMP on the Pi to manage a couple of simple websites, perhaps emoncms as well. Then I would take your advice in putting the mysql databases and the logfiles on a separate HDD.