I’ve put together a new emonSD pre build Raspberry Pi SD card incorporating many changes and some important security updates. It would be great if anyone could test the new image (
@jon ? ) and report back if it works ok for you.
Emocms data can be migrated using built-in Emoncms backup (import / export) module:
Import / Backup - Guide | OpenEnergyMonitor
Stick with 4GB min SD card (8GB+ recommended). Expand partition with
Filesystem Size Used Avail Use% Mounted on
/dev/root 3.4G 2.1G 1.2G 64% /
devtmpfs 483M 0 483M 0% /dev
tmpfs 487M 0 487M 0% /dev/shm
tmpfs 487M 6.6M 480M 2% /run
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 487M 0 487M 0% /sys/fs/cgroup
tmpfs 40M 3.8M 37M 10% /var/lib/openhab
tmpfs 1.0M 4.0K 1020K 1% /var/lib/dhcpcd5
tmpfs 1.0M 0 1.0M 0% /var/lib/dhcp
tmpfs 50M 328K 50M 1% /var/log
tmpfs 30M 52K 30M 1% /tmp
/dev/mmcblk0p1 60M 21M 40M 35% /boot
/dev/mmcblk0p3 194M 37M 147M 21% /home/pi/data
Update Linux kernal to at least 4.4.26-v7+ and get latest security & raspi firmware fixes (e.g. Dirty Cow) (dist-upgrade)
$ apt-get clean all (free up unused packages, approx 700Mb)
Latest Emoncms (currently V9.7.7)
New graph module
Lots of dashboard fixes and improvements
Emoncms Server Info
Emoncms Version low-write 9.7.7 | 2016.10.29
Modules app, config, dashboard, graph, wifi
Buffer 0 feed points pending write
Writer Daemon is running with sleep 60s
Server OS Linux 4.4.26-v7+
Host emonpi emonpi (127.0.1.1)
Date 2016-11-01 00:52:38 UTC
Uptime 00:52:38 up 5 min, 1 user, load average: 0.76, 0.65, 0.31
HTTP Server Apache/2.4.10 (Raspbian) HTTP/1.1 CGI/1.1 80
Database Version MySQL 5.5.52-0+deb8u1
Host localhost (127.0.0.1)
Date 2016-11-01 00:52:38 (UTC 00:00)
Stats Uptime: 5583 Threads: 3 Questions: 1699 Slow queries: 0 Opens: 61 Flush tables: 1 Open tables: 50 Queries per second avg: 0.304
Redis Version 2.8.17
Host localhost:6379 (127.0.0.1)
Size 0 keys (471.91K)Flush
Uptime 0 days
MQTT Version 1.4.10
Host localhost:1883 (127.0.0.1)
Pi CPU Temp 41.86°CShutdownReboot
Total: 973.11 MB Used: 245.53 MB Free: 727.58 MB
Disk Mount Stats
Total: 3.33 GB Used: 2.01 GB Free: 1.16 GB
Total: 59.95 MB Used: 20.78 MB Free: 39.16 MB
Total: 193.66 MB Used: 36.87 MB Free: 146.8 MB
PHP Version 5.6.27-0+deb8u1 (Zend Version 2.6.0)
Modules Core date ereg libxml openssl pcre zlib bcmath bz2 calendar ctype dba dom hash fileinfo filter ftp gettext SPL iconv mbstring session posix Reflection standard shmop SimpleXML soap sockets Phar exif sysvmsg sysvsem sysvshm tokenizer wddx xml xmlreader xmlwriter zip apache2handler PDO curl dio json mcrypt mosquitto mysql mysqli pdo_mysql readline redis mhash Zend OPcache
By default emonSD has a number of services running, if you don’t want to use these they can be disabled with:
[email protected]:~ $ sudo systemctl disable openhab.service
[email protected]:~ $ sudo systemctl disable nodered.service
[email protected]:~ $ sudo systemctl disable emonPiLCD.service
[email protected]:~ $ sudo systemctl disable apache2.service
7 November 2016 16:25
Can the emonpi be updated just with using the update button or do you have to download a new image?
Downloading at the moment, I’ll see if I can do anything with the 1.5GB download size…
You will get all the important security updates and Emoncms updates by running:
Admin > emonpiupdate in local Emoncms and upgrading Debian packages
sudo apt-get update && sudo apt-get upgrade
sudo apt-get dist-upgrade
When given the option choose to keep the version of
php.ini currently installed
7 November 2016 17:30
the 2nd command line is the same command twice… should be this?
sudo apt-get update
sudo apt-get dist-upgrade
changes to the corrected lines…
Crushed it down to an 825MB download…
825MB download version
MD5: 3961e96cf2e1ab46d750d0a0cae72a2e emonSD-07Nov16.zip
MD5: cf8537e90ffd98ffb5838fbe3c878d4d emonSD-07Nov16.img
Did you try and boot the image? Does your version boot ok?
Yes, correct. Update then Upgrade. I’ve fixed my post above
Yes and yes, I’m planning to write some full instructions on how I manage to compress the image so far, its not
that complex, but there are a few steps to it.
I’ll re-download your version and make up a full how to with all the steps in it, plus the commands etc, that should help you (or anyone else) understand how to really pull the size down prior to putting images up for download.
11 November 2016 16:24
Glyn - I started my testing last night but quickly found this was a 4GB image instead of the 8GB image discussed here:
Increase emonSD pre-built SD card to 8GB min
I had been writing (trying to write?) a migration script that captures the items not grabbed by the backup/export script. And I quickly ran out of space on the /data directory:
/dev/mmcblk0p3 194M 37M 147M 21% /home/pi/data
Is it possible to create the 8GB image instead?
11 November 2016 18:39
I booted the emonPi with the beta 4GB image, let it do the first boot emonPi update, and then did the expand for an 8GB card (thank you Paul!):
After the emonPi reboot I saw this on the display:
It is easily corrected with:
sudo service emonPiLCD restart
I tried a
sudo reboot and a paperclip shutdown. Sometimes it boots fine and other times I get the above mqtt display error.
11 November 2016 18:58
sudo raspi-config area - Can the
en_US.UTF-8 UTF-8 be clicked on by default?
11 November 2016 19:38
command be run as part of the build?
Node-RED version: v0.15.2 (I think the Nov build already had v0.15.2)
node.js version: v4.6.2 (from version 0.10.x)
npm version: v2.15.11 (from version 1.4.x)
PS - my apologies for the rapid fire posts!
11 November 2016 21:08
This error is in the first boot emonPi Update:
(I do not have a huawei device)
@Andy_Taylor, just tested your packed down version. It seems to work great for me. It would be interesting to hear what you did to it to shrink it down!
@Jon , thanks a lot for your testing. Sorry for the delay in getting back I’ve been away.
As mentioned in the
change log for the emonSD 07Nov16, I decided to keep the image 4GB. This was party due to @Andy_Taylor 's space optimisations. The image can be expanded to fill 8GB with
Interesting, did the message say forever or if you left it for 5min or so would MQTT connect?
What benefit would this have?
Nodejs and nodered should be updated via apt for the stable versions. IMO I would prefer to stick to the stable builds released via apt and the Debian packages. Keen users can always update manually if desired.
Thanks for letting me know, however this is not a big issue since there have been no changes to the huawei repo, however I have fixed the permission error during the update script:
Download file has been updated to
@Andy_Taylor compressed 825MB image:
15 November 2016 04:42
small forever - the
ERROR: MQTT message was there for a few hours.
I am assuming this is a locales configuration related to the US:
I believe this is something like the format of mm/dd/yyyy versus dd/mm/yyyy.
Is this a bad?!? Should I not be picking the US locales?
Per the Node-RED website: “
We recommend the use of node.js LTS.”
NodeJS v0.10 does not work with some nodes (like the Nest node: node-red-contrib-nest v0.1.9)
15 November 2016 05:56
I’m a rank newbie with emon. By way of feedback though; I managed to download and build the emonSD-07Nov16 BETA SD card. It ran flawlessly through the install, partition expansion and initial registration of Emoncms 9.7.7 | 2016.10.29.
Byte Order: Little Endian
On-line CPU(s) list: 0-3
Thread(s) per core: 1
Core(s) per socket: 4
Model name: ARMv7 Processor rev 5 (v7l)