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Installation docs

General guide

  1. dd the latest image onto the SD card

  2. Copy updated files to the bootstrap partition. Depending on your OS and name of the parition, the path /Volumes/Untitled may need to be changed. This is the default for macOS, however.

    cp wlansetup.sh snx_autorun.sh /Volumes/Untitled/
cp -R bootstrap /Volumes/Untitled

  3. Copy private WiFi configuration to the SD card:

    cp .private/.wifi* /Volumes/Untitled/
cp .private/wpa_supplicant.conf /Volumes/Untitled/bootstrap/

  4. Turn on the camera and wait a while til the light blinks blue, indicating the camera is on.

  5. Place the microSD card into the camera and wait for the 'hammer' (tink-tink noise from the internal speaker)

  6. Get access as root to the camera either via SSH or via telnet. The username is root and the default password is ismart12.

  7. Change the root password to something else via passwd.

  8. SSH into the camera and enable SSH key login (the /root home directory isn't writable so we have to move it):

    cp -r /root /media/mmcblk0p2/
sed -i 's#/root#/media/mmcblk0p2/root#g' /etc/passwd
mkdir -p /media/mmcblk0p2/root/.ssh
chmod 700 /media/mmcblk0p2/root/.ssh
touch /media/mmcblk0p2/root/.ssh/authorized_keys
chmod 600 /media/mmcblk0p2/root/.ssh/authorized_keys
echo 'YOUR_KEY_HERE' >> /media/mmcblk0p2/root/.ssh/authorized_keys

  9. Download/replace the following files in the data partition:

    IP_ADDRESS=192.168.0.123
scp data/usr/bin/{fang-ir-control.sh,trigger-alarm,check_rtsp} "root@$IP_ADDRESS:/media/mmcblk0p2/data/usr/bin/"
scp data/etc/scripts/* "root@$IP_ADDRESS:/media/mmcblk0p2/data/etc/scripts/"
scp data/usr/bin/{pcm_play-48k,snx_isp_ctl} "root@$IP_ADDRESS:/media/mmcblk0p2/data/usr/bin/"
scp -r sounds "root@$IP_ADDRESS:/media/mmcblk0p2/"
scp -r updates "root@$IP_ADDRESS:/media/mmcblk0p2/"

This adds the requisite binaries for controlling the ISP (Image Signal Processor), alarm and adds/disables services according to preferences. This also introduces a new wpa_supplicant and associated libraries within the updates/ folder (and uses these as part of the 01-network script copied in these steps).

  • Expand the SD card (requires reboot and fiddling)
  • Set the TZ to EST-10 and hostname to XiaoFang-Cam-X
  • Disable Cloud Applications once boot has been assured several times (including after hard power down)

Restoring a copy of an SD card on Mac

From http://hints.macworld.com/article.php?story=2009041216314856:

hdid -nomount "fang-sd-card.dmg"
diskutil list
sudo dd if=/dev/disk4 of=/dev/disk2 bs=1M

Accessing the RTSP stream

Use the URL:

rtsp://device-ip/unicast

Enabling cron

Create the crontabs directories:

mkdir -p /var/spool/cron/crontabs
crontab -e
# Now make your changes...

Now on boot, start crond to run the daemon.

Speaker

Both methods end up writing to the same GPIO pin output for this Sonix chip.

Enable the speaker:

# Old pin reference
gpio_ms1 -n 7 -m 1 -v 1
# New pin reference
gpio_aud write 1 4 1

Disable the speaker:

# Old pin reference
gpio_ms1 -n 7 -m 1 -v 0
# New pin reference
gpio_aud write 1 4 0

SDK

Firstly, obtain the Sonix SDK and setup an Ubuntu machine. I've set up a machine using Docker and the SDK .tgz is located within the path /path/to/host/folder on the host::

docker run -v $PWD:/app -it ubuntu:16.04 bash
dpkg --add-architecture i386 && apt update
apt install -y sudo

If you're not keen on Docker, then you can run all of the following on a bare metal machine or other form of VM host (like Virtualbox).

Install the dependencies::

sudo apt install -y \
  bash \
  gcc \
  make \
  patch \
  libencode-detect-perl \
  libdigest-crc-perl \
  libncurses-dev \
  libz-dev:i386 \
  cpio \
  lzma \
  lzop

Reconfigure your default /bin/sh if required. The scripts have shebangs that actually require bash but declare /bin/sh::

sudo rm /bin/sh && sudo ln -s /bin/bash /bin/sh

Extract and configure the SDK:

tar xf SN986_1.60_QR_Scan_019a_20160606_0951.tgz
cd SN986_1.60_QR_Scan_019a_20160606_0951
bash ./sdk.unpack
# Minor patch for perl error
sed -i 's/defined(@val)/@val/' snx_sdk/kernel/linux-2.6.35.12/src/kernel/timeconst.pl

cd snx_sdk/buildscript
make sn98660_402mhz_sf_defconfig

Compile various parts of the SDK, examples, and so on, and build the final file structure:

make
make ez-setup

At this point, executable objects have been compiled and can be extracted to copy to your device. For example, to play sounds you can use snx_sdk/app/ez-setup/rootfs/usr/bin/pcm_play. There are many more similar examples and utilities available elsewhere in the directory tree.

To list all modules (eg in case you want to recompile just part of the setup):

make showmodules
make [module name from previous output]

To optionally build the firmware and fileystem images, you can run::

make install

Updating wpa_supplicant

These instructions were adapted from http://wiki.beyondlogic.org/index.php?title=Cross_Compiling_iw_wpa_supplicant_hostapd_rfkill_for_ARM#wpa_supplicant_2 and updated accordingly to use newer library versions and ensure that wpa_supplicant is built from source to incorporate the KRACK patches which are coming in the as-yet-unreleased v2.7.

Firstly, install and configure the SDK following the instructions above. You can stop just before the point of running make to compile the entire SDK; you only need to have configured the SDK and have its toolchain available. Specifically, you need the crosstool compilers and the kernel headers to build the libraries and software. This ensures that the same uClibc you have on the camera is the one that you're building against for the new versions of the libraries and wpa-supplicant. Adjust your SDK_PATH below to correspond to where you set up your SDK.

export SDK_PATH=/opt/SN986_1.60_QR_Scan_019a_20160606_0951

Install depdenencies and configure environment:

apt install -y wget
mkdir -p /opt/build/updates
cd /opt/build
export PATH=$PATH:$SDK_PATH/snx_sdk/toolchain/crosstool-4.5.2/bin

Build libnl, a depednency of wpa_supplicant:

apt install -y libbison-dev flex
wget https://www.infradead.org/~tgr/libnl/files/libnl-3.2.25.tar.gz
tar xf libnl-*.tar.gz
pushd libnl-*
./configure --host=arm-linux --prefix=/opt/build/updates
make && make install
popd

Build openssl to get libssl, a depednency of wpa_supplicant:

wget https://www.openssl.org/source/openssl-1.0.2r.tar.gz
tar xf openssl-*.tar.gz
pushd openssl-*
export ARCH=arm
export CROSS_COMPILE=arm-linux-
./Configure linux-generic32 --prefix=/opt/build/updates
make && make install
unset ARCH
unset CROSS_COMPILE
popd

Build the latest wpa_supplicant:

apt install -y pkg-config
wget https://w1.fi/releases/wpa_supplicant-2.7.tar.gz
tar xf wpa_supplicant-*.tar.gz
pushd wpa_supplicant-*/wpa_supplicant
cp defconfig .config
export PKG_CONFIG_PATH='/opt/build/updates/lib/pkgconfig'
make CC=arm-linux-gcc EXTRA_CFLAGS='-I /opt/build/updates/include' LDFLAGS='-L /opt/build/updates/lib -ldl'
make install DESTDIR=/opt/build/updates
popd
popd

Now, you have the relevant libraries in /opt/build/updates/lib and the executables in /opt/build/updates/usr. Copy these to your camera:

IP_ADDRESS=192.168.1.100
scp -r /opt/build/updates/{lib,usr} "root@$IP_ADDRESS:/media/mmcblk0p2/updates/wpa_supplicant"

And now, on your camera, you will need to run wpa_supplicant from this specific path and by specifying the correct LD_LIBRARY_PATH so it can find the relevant libraries it was built with like so:

LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/media/mmcblk0p2/updates/lib \
    /media/mmcblk0p2/updates/usr/local/sbin/wpa_supplicant

Assuming everything is good to go, you'll see the help text for wpa_supplicant and not an error about missing libraries. Now, apply the adjusted 01-network script into your data/etc/scripts/ directory (or adjust your file yourself) and you're good to go.

Updating RTSP server

A customised RTSP server is available from https://github.com/davidjb/snx_rtsp_server which adds some additional features over the built-in version - particularly authentication for RTSP.

Firstly, install and configure the SDK following the instructions above. You can stop just before the point of running make to compile the entire SDK; you only need to have configured the SDK and have its toolchain available. Specifically, you need the crosstool compilers and the kernel headers to build the libraries and software. This ensures that the same uClibc you have on the camera is the one that you're building against for the new versions of the libraries and wpa-supplicant. Adjust your SDK_PATH below to correspond to where you set up your SDK.

export SDK_PATH=/opt/SN986_1.60_QR_Scan_019a_20160606_0951

Build the dependencies and configure build environment:

cd "$SDK_PATH"
pushd snx_sdk/buildscript
make distribute-pre
make middleware_video middleware_rate_ctl middleware_audio middleware_gpio middleware_common middleware_sdrecord
popd

Build a customised version of snx_rtsp_server:

apt install -y git
pushd snx_sdk/app/example/src/ipc_func/
mv rtsp_server rtsp_server.old
git clone https://github.com/davidjb/snx_rtsp_server.git rtsp_server
pushd rtsp_server
make && make install

Copy to the camera (create the remote directories if necessary):

IP_ADDRESS=192.168.1.100
ssh root@$IP_ADDRESS 'mkdir -p /media/mmcblk0p2/updates/rtsp_server/usr/bin'
scp -r ../../../../../middleware/_install/lib root@$IP_ADDRESS:/media/mmcblk0p2/updates/rtsp_server
scp ./snx_rtsp_server root@$IP_ADDRESS:/media/mmcblk0p2/updates/rtsp_server/usr/bin

popd && popd

On the camera, create a file for authentication credentials on the camera:

echo 'username:password' > /etc/config/.rtsp_auth

Ensure that the new 20-rtsp-server script is installed on the SD card and now you can restart the service. You should be prompted for auth!