LaGu Mining Rig

This Project is to test Mining on div. Arm v7 (32bit) and Arm v8 (64bit) SBC-Boards. Inspired by the Electroneum Project and their intent to mine their Cryptonight-Based Coin ETN on mobile Phones.

Our first take is the Arm v7 (32bit) Exynos5 Octa based Odroid XU4/MC1/HC1 from hardkernel.com.
Others to follow.

In this repository is the Miner (see https://github.com/tpruvot/cpuminer-multi) and a little code around it for downloading a config-file from an central location on every start of the miner, stop mining and enable/disable a watchdog-style process-mgmt.
The miner autostarts on boot and starts every 5 minutes if it was stopped/or has crashed.

Preparing the microSD card

The Image can be downloaded from here.
Unzip it with 7zip and use etcher or other SW to write it to an microSD card with at least 1G.

Configuration

After the first boot, the hostname is set to rig-xxxxxx, where xxxxxxx are the least 6 chararcters from the MAC-Address.
To find it, use a Android-App like Fing, have a look at your Routers DHCP-listing, or on linux use something like
nmap -sn 192.168.1.0/24|egrep --color "for.[a-z\.]*.\(*.*.*.*\)" (adopt the IP-Address to your Network-Address).

There is a user lagu (pw: lagu) which is used for mining.
The root password is set to .pw_lagu. I's recommended to change both passwords with sudo passwd <user> on your first login.
You can ssh to your SBC (Windows user use i.e. PUTTY) and adapt the config.

Configration Template

Download the config-file from here to your workstation, change POOLx and WALLETx to your needs.
HINT: at the moment, only POOL1, POOLPASSWD1 and WALLET1 are used.
HINT: Windows User use notepad++ or similar to edit the Unix-style config-files

If you have only one or two SBCs or no access to an webserver

on every SBC:

• delete the file lagu/remote.conf
• delete the file lagu/lagu.conf
• copy your template to lagu/local.conf

Without an remote.conf, the miner don't try to download a remote config-file.

ssh rig-xxxxxx # or on win use putty
cd lagu
rm lagu.conf remote.conf
nano local.conf

If you have more SBCs and access to an webserver

Upload the config-file to the webserver and let the rigs download them before starting to mine.
In this scenario, SSH to every SDB once and use an editor of your choice to write the link of the config-file into the file lagu/remote.conf

Edit and upload the config-file to your webserver so that it ends up in the location which you
referred in remote.conf

ssh rig-xxxxxx # or use putty on win
cd lagu
nano remote.conf

The miner first reads local.conf (if it exists) and then, if remote.conf exists, downloads the confg-file from the link in
remote.conf to lagu.conf and reads that, "overwriting" the "defaults" in local.conf.

Grouping SBCs

The name of the config-file which resides on the webserver can be freely choosen. So, with different remote.conf on different SBCs, you can let them downlowd different config-files and so group multiples SBCs together to i.e mine on different pools.

Activate new config

To activate a new config, restart miner:

mining restart

or reboot the SBC:

sudo reboot

Mining command

mining --help
usage: mining <command>
command:
        start   Start mining (and download config-file)
	stop    Stop mining
	restart Restart mining
	enable  Enable autostart & Watchdog
	disable Disable autostart & Watchdog
	update  Update lagu-rig sw from git

Connection to miners Output

To see the output of the miner, you can connect to the screen session with screen -r.
To leave the session, press <CTRL>-A D
If you instead use <CTRL>-C, the miner will stop. It will start again after 5 min, if you didn't disable it with mining disable.