I have several Omega2S+ on OpenWRT 18, Omegea-ware 0.3.2 b218 booting from external storage using exactly this set of commands.

opkg update
opkg install kmod-usb-storage-extras e2fsprogs kmod-fs-ext4 block-mount

umount /tmp/mounts/SD-P1
echo -e "y" | (mkfs.ext4 /dev/mmcblk0p1)

mkdir /mnt/mmcblk0p1
mount /dev/mmcblk0p1 /mnt/mmcblk0p1
block detect > /etc/config/fstab
uci set fstab.@mount[0].target=/overlay
uci set fstab.@mount[0].enabled=1
uci commit
mount /dev/mmcblk0p1 /mnt/ ; tar -C /overlay -cvf - . | tar -C /mnt/ -xf - ; umount /mnt/

then

reboot now & exit

log back in and check

df -h. 

After upgrading to the latest OpenWRT per this blog post OpenWRT 18 available for omega2 & omega2+ I had some issues getting past working nodejs apps to work.

The root cause was the old onoff-node located at /usr/bin/onoff-node is no longer available via opkg install onoff-node. It is now possible to use the standard onoff module via npm.

However, to get there is a combination of several steps so I am going to explain the steps I went through to get it to work.

In short, make and gcc need to be installed so that npm can compile the onoff module. To be able to do that it's necessary to point opkg to the OpenWRT LEDE repos so they can be installed via opkg.

To compile onoff the omega will run out of ram so it's necessary to enable a swap file.

The Omega2S+ that I was working on didn't have enough room for python, nodejs and npm so I used an external SD card.

1. upgrade to the latest OS. OpenWRT 18 available for omega2 & omega2+

oupgrade --latest

After this finishes and you log back in you should see something like this.

Ω-ware: 0.3.2 b218

1. boot from the SD card. Booting from external storage

opkg update
opkg install kmod-usb-storage-extras e2fsprogs kmod-fs-ext4 block-mount

umount /tmp/mounts/SD-P1
echo -e "y" | (mkfs.ext4 /dev/mmcblk0p1)

mkdir /mnt/mmcblk0p1
mount /dev/mmcblk0p1 /mnt/mmcblk0p1
block detect > /etc/config/fstab
uci set fstab.@mount[0].target=/overlay
uci set fstab.@mount[0].enabled=1
uci commit
mount /dev/mmcblk0p1 /mnt/ ; tar -C /overlay -cvf - . | tar -C /mnt/ -xf - ; umount /mnt/

now reboot, and log back in. You should see a large overlay in your df -h output, something like this for an 8G SD carrd.

df -h
overlayfs:/overlay        7.2G    480.8M      6.4G   7% /

1. Create a swap file and activate it. Extending Omegas Available Memory

opkg update;
opkg install swap-utils

Make a swap file, I made min in my root directory since I now have additional space by mounting the SD card.

dd if=/dev/zero of=/root/swap.page bs=1M count=256

Turn on the swap file

swapon /tmp/mounts/USB-A1/swap.page

I didn't permanently mount mine I only need the swap file for this instance. To check the swap file sue the free command.

free
             total       used       free     shared    buffers     cached
Mem:        124920      71360      53560          8       6888      40624
-/+ buffers/cache:      23848     101072
Swap:       262140       2560     259580

You should see the Swap: line

1. Install python, nodejs, npm.

opkg install python nodejs node-npm

1. install node-gyp https://docs.onion.io/omega2-docs/node-red-article.html#

node --max_old_space_size=512 $(which npm) install -g node-gyp

1. Switch back to LEDE packages so that make and gcc can be installed. https://docs.onion.io/omega2-docs/using-opkg.html#using-opkg-switch-to-lede-repos

This is what my /etc/opkg/distfeeds.conf ended up looking like.

src/gz openwrt_core http://downloads.openwrt.org/releases/18.06-SNAPSHOT/targets/ramips/mt76x8/packages
src/gz openwrt_base http://downloads.openwrt.org/releases/18.06-SNAPSHOT/packages/mipsel_24kc/base
src/gz openwrt_luci http://downloads.openwrt.org/releases/18.06-SNAPSHOT/packages/mipsel_24kc/luci
src/gz openwrt_onion http://downloads.openwrt.org/releases/18.06-SNAPSHOT/packages/mipsel_24kc/onion
src/gz openwrt_packages http://downloads.openwrt.org/releases/18.06-SNAPSHOT/packages/mipsel_24kc/packages
src/gz openwrt_routing http://downloads.openwrt.org/releases/18.06-SNAPSHOT/packages/mipsel_24kc/routing
src/gz openwrt_telephony http://downloads.openwrt.org/releases/18.06-SNAPSHOT/packages/mipsel_24kc/telephony
src/gz omega2_core http://repo.onioniot.com/omega2/packages/core
src/gz omega2_base http://repo.onioniot.com/omega2/packages/base
src/gz omega2_packages http://repo.onioniot.com/omega2/packages/packages
src/gz omega2_routing http://repo.onioniot.com/omega2/packages/routing
src/gz omega2_onion http://repo.onioniot.com/omega2/packages/onion

basically I just uncommitted everything.

1. Install make and gcc https://docs.onion.io/omega2-docs/node-red-article.html#

opkg update
opkg install make gcc
ar -rc /usr/lib/libpthread.a

Go get a cup of coffee, this will take a few minutes.

1. Finally ready to install npm onoff This will take a few minutes.

node --max_old_space_size=512 $(which npm) install onoff

That's it. You should see onoff in your node_modules directory now.

I verified that it works with a quick test .js to toggle a GPIO.

I have a jig that I use to set up a few hundred Omega2+ with.

Everything you do from the Onion html setup page from upgrading the omega firmware to resetting it via firstboot -y etc can be automated from the command line.

The jig is a custom PCB I have designed that has an ethernet port and built in FTDI for the Omega Serial Port 0.

You could accomplish the same thing using the Omega2+ expansion doc that has the CP2102 on it.

https://onion.io/store/expansion-dock/

Star by plugging in an out of the box Omega into the programmer PCB.

Connecting through S0 which allows a direct connection to the Omega2+ with out needing to join it's adhoc wifi AP or provide login credentials.

The programming jig is connected to a Raspberry pi via USB cable.

A NodeJS script on the Pi connects using the serialport library and sends commands direct to the Omega2+.

The same thing could be accomplished using expect on the Pi instead of NodeJS it's really just what you are comfortable with. I have a web interface to the programmer so NodeJS made more sense.

The script first logs on by sending a new line and waiting for the bash prompt.

Once the Omega2+ boot process is complete and the script has received the bash prompt the script executes a series of setup commands.

One of the fist commands it does is to change the network interface ETH0 over to DHCP so that it can be used to download any repo files needed.

If you are using the expansion doc you would need to configure a WiFi connection from the command line, I do that through the uci utility.

Here is a very high level summary of how to do that with uci.

View the wireless settings.

uci show wireless

Change a setting by doing something like this.

uci set wireless.@wifi-config[0].ssid='YOURSSIDHERE'
... other wifi settings
uci set wireless.@wifi-config[0].key='WIFIPASSWHERE'

Then you have to restart the network with

/etc/init.d/network restart

The script installs git and then downloads custom code from my repo.

git eats up a log of space. You could also just use wget to download source files directly to your Omega if space is an issue.

When it's all done the Pi does a few function tests on the Omega2+ and then toggles a buzzer on the programmer PCB to indicate the process is complete.

Here is a peek at what the web interface to the programmer looks like.

If you reflow the Omega 2S+ off the board and hook the GND, D+, D- up to a computer are you able to see the BG95 then? It just makes sense to check the hardware out and ensure the BG95 is up and doing what you expect before trying to chase down issues on the Omeag2S+

I you are using 3.3v then the schematic I sent you will work if you leave out R2.

So, I don't think that circuit is going to do what you want.

I see you have a voltage divider comprised of 51K and 5.1k.

What will happen is the higher GPIO input resistance makes it possible for much higher then 3.3v to be present at the GPIO pin, especially when no current is flowing.

What you want to do is create a voltage divider to ground configured in such a way that the voltage to the pin will never exceed 3.3v, but really anything over 2.8v is good enough.

Something more like this drawing.

Also, take care with the pins you hook up to, many of the GPIO need to be left floating at boot.

It might make more sense to use a MCP23008 DIO expander to monitor the inputs instead of direct to the Onion.

Just to verify you are able to reboot after these steps and see a larger overlay with df -h?

What is the command you are using to try and set up you swap file?

I have several Omega2S+ on OpenWRT 18, Omegea-ware 0.3.2 b218 booting from external storage using exactly this set of commands.

opkg update
opkg install kmod-usb-storage-extras e2fsprogs kmod-fs-ext4 block-mount

umount /tmp/mounts/SD-P1
echo -e "y" | (mkfs.ext4 /dev/mmcblk0p1)

mkdir /mnt/mmcblk0p1
mount /dev/mmcblk0p1 /mnt/mmcblk0p1
block detect > /etc/config/fstab
uci set fstab.@mount[0].target=/overlay
uci set fstab.@mount[0].enabled=1
uci commit
mount /dev/mmcblk0p1 /mnt/ ; tar -C /overlay -cvf - . | tar -C /mnt/ -xf - ; umount /mnt/

then

reboot now & exit

log back in and check

df -h. 

Oh one thing I forgot to mention, after I got all this working I was able to tar the node_modules directory up and move it to an Omega2S+ with no SD card.

After updating it to OpenWRT18, the nodejs install is small enough no external boot is necessary and there is no need for NPM on the production boards since they will never install a package. So that is nice to be able to eliminate the SD card.

After upgrading to the latest OpenWRT per this blog post OpenWRT 18 available for omega2 & omega2+ I had some issues getting past working nodejs apps to work.

The root cause was the old onoff-node located at /usr/bin/onoff-node is no longer available via opkg install onoff-node. It is now possible to use the standard onoff module via npm.

However, to get there is a combination of several steps so I am going to explain the steps I went through to get it to work.

In short, make and gcc need to be installed so that npm can compile the onoff module. To be able to do that it's necessary to point opkg to the OpenWRT LEDE repos so they can be installed via opkg.

To compile onoff the omega will run out of ram so it's necessary to enable a swap file.

The Omega2S+ that I was working on didn't have enough room for python, nodejs and npm so I used an external SD card.

1. upgrade to the latest OS. OpenWRT 18 available for omega2 & omega2+

oupgrade --latest

After this finishes and you log back in you should see something like this.

Ω-ware: 0.3.2 b218

1. boot from the SD card. Booting from external storage

opkg update
opkg install kmod-usb-storage-extras e2fsprogs kmod-fs-ext4 block-mount

umount /tmp/mounts/SD-P1
echo -e "y" | (mkfs.ext4 /dev/mmcblk0p1)

mkdir /mnt/mmcblk0p1
mount /dev/mmcblk0p1 /mnt/mmcblk0p1
block detect > /etc/config/fstab
uci set fstab.@mount[0].target=/overlay
uci set fstab.@mount[0].enabled=1
uci commit
mount /dev/mmcblk0p1 /mnt/ ; tar -C /overlay -cvf - . | tar -C /mnt/ -xf - ; umount /mnt/

now reboot, and log back in. You should see a large overlay in your df -h output, something like this for an 8G SD carrd.

df -h
overlayfs:/overlay        7.2G    480.8M      6.4G   7% /

1. Create a swap file and activate it. Extending Omegas Available Memory

opkg update;
opkg install swap-utils

Make a swap file, I made min in my root directory since I now have additional space by mounting the SD card.

dd if=/dev/zero of=/root/swap.page bs=1M count=256

Turn on the swap file

swapon /tmp/mounts/USB-A1/swap.page

I didn't permanently mount mine I only need the swap file for this instance. To check the swap file sue the free command.

free
             total       used       free     shared    buffers     cached
Mem:        124920      71360      53560          8       6888      40624
-/+ buffers/cache:      23848     101072
Swap:       262140       2560     259580

You should see the Swap: line

1. Install python, nodejs, npm.

opkg install python nodejs node-npm

1. install node-gyp https://docs.onion.io/omega2-docs/node-red-article.html#

node --max_old_space_size=512 $(which npm) install -g node-gyp

1. Switch back to LEDE packages so that make and gcc can be installed. https://docs.onion.io/omega2-docs/using-opkg.html#using-opkg-switch-to-lede-repos

This is what my /etc/opkg/distfeeds.conf ended up looking like.

src/gz openwrt_core http://downloads.openwrt.org/releases/18.06-SNAPSHOT/targets/ramips/mt76x8/packages
src/gz openwrt_base http://downloads.openwrt.org/releases/18.06-SNAPSHOT/packages/mipsel_24kc/base
src/gz openwrt_luci http://downloads.openwrt.org/releases/18.06-SNAPSHOT/packages/mipsel_24kc/luci
src/gz openwrt_onion http://downloads.openwrt.org/releases/18.06-SNAPSHOT/packages/mipsel_24kc/onion
src/gz openwrt_packages http://downloads.openwrt.org/releases/18.06-SNAPSHOT/packages/mipsel_24kc/packages
src/gz openwrt_routing http://downloads.openwrt.org/releases/18.06-SNAPSHOT/packages/mipsel_24kc/routing
src/gz openwrt_telephony http://downloads.openwrt.org/releases/18.06-SNAPSHOT/packages/mipsel_24kc/telephony
src/gz omega2_core http://repo.onioniot.com/omega2/packages/core
src/gz omega2_base http://repo.onioniot.com/omega2/packages/base
src/gz omega2_packages http://repo.onioniot.com/omega2/packages/packages
src/gz omega2_routing http://repo.onioniot.com/omega2/packages/routing
src/gz omega2_onion http://repo.onioniot.com/omega2/packages/onion

basically I just uncommitted everything.

1. Install make and gcc https://docs.onion.io/omega2-docs/node-red-article.html#

opkg update
opkg install make gcc
ar -rc /usr/lib/libpthread.a

Go get a cup of coffee, this will take a few minutes.

1. Finally ready to install npm onoff This will take a few minutes.

node --max_old_space_size=512 $(which npm) install onoff

That's it. You should see onoff in your node_modules directory now.

I verified that it works with a quick test .js to toggle a GPIO.

Is there a solution for OpenWRT 18.06, and onoff-node?

Version: Ω-ware: 0.3.2 b218

After upgrading this no longer works.

opkg install onoff-node
Unknown package 'onoff-node'.
Collected errors:
 * opkg_install_cmd: Cannot install package onoff-node.

I figured it out. onoff-node is gone now that npm onoff is available. Here are steps I went through to get it working. OpenWRT 18.06 & Nodejs installing onoff node module [ solved ]

Thanks for all you guys do to constantly keep the Omega development moving forward.

This is pretty cool. I know this is a bit off topic but if a developer wanted to use python/spi-dev, would the Omega2 be able to correctly read the SX1276 config registers with out any data errors?

Is this project using hspi or bit-bang spi?

I am having a problem with the Omega2S/Omega2S+ Reset pin C21.

Per the documentation C21 is the power on reset.

My boards have a 10k Pullup on that pin with a momentary pushbutton to ground.

Grounding C21 does cause the Omega2S to shut down, but it does not boot back up with out a power cycle.

The desired functionality is a full reset of the Omega2S with out a power cycle.

Does anybody else have similar results or a real hard reset solution?