doorlock

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# Migration done on 2021-11-16

Node bundles TLS root certificates and does not respect system root certificates.
Node v8 is too old to has the latest root certificate used by Let's encrypt.

The following changes were done on the raspberry pi.

- Installed Node 10.24.1 to work around certificate expiration.
- Installed Node 8.17.0 to replace the existing Node 8.14.0
- Edited /etc/systemd/system/doorlock-skygear@.service to use node 10.24.1
- Edited /etc/systemd/system/doorlock-ble@.service to use node 8.17.0

There was an attempt to also upgrade the Node used by doorlock-ble, but the dependency `bleno` works on Node 8 exclusively.
Therefore, the Node version of doorlock-ble must be fixed at 8.

# doorlock

Oursky IoT doorlock system.

System Architecture:
![](https://github.com/oursky/doorlock/raw/master/architecture.png)

(drawn using GNU Dia)
## Hardware

Circuit diagrams are drawn with this [Circuit Simulator](http://www.falstad.com/circuit/).<br/>
Diagrams are saved as `txt` files, you can import them under `File > Import From Text`.

**Relay Board:**
![](https://github.com/oursky/doorlock/raw/master/relay-board/circuit.png)

**Connections:**
* Release Button: GPIO0/Ground
* Release Signal: GPIO1/Ground

## Raspberry Pi 3

**System:** ArchLinux ARM

**Enable Watchdog:**

```
[~/]$ pacman -S watchdog
[~/]$ systemctl enable watchdog
[~/]$ systemctl start watchdog
```

```
# /etc/watchdog.conf

ping = 127.0.0.1
max-load-1 = 24
watchdog-timeout = 10
watchdog-device = /dev/watchdog
realtime = yes
priority = 1
```
### Doorlock Daemon

Responsible for interacting with hardware connected to the Pi. Exposes a HTTP API listening on `127.0.0.1:8090`, any requests sent to this socket will trigger an unlock. An optional header `X-Source` can be sent to identify the triggering source (e.g. Bluetooth LE). Written in clojure, runs on JVM.

**Build Dependencies:**

* leiningen

**Build:**
```
[~/]$ git clone ...
[~/doorlock/daemon-doorlock]$ lein uberjar
```
The compiled JAR is now in `daemon-doorlock/target/doorlock-<version>-standalone.jar`.

**Runtime Dependencies:**

* java
* wiringpi-git (AUR)

**Install as systemd service:**

1. copy the compiled JAR to `/home/oursky/doorlock.jar`
2. copy `doorlock.service` to `/etc/systemd/system/`
3. enable and start the service:
```
[oursky ~/]$ sudo systemctl enable doorlock
[oursky ~/]$ sudo systemctl start doorlock
```

**Note:** If your username is not `oursky`, you need to edit `doorlock.service` accordingly.

### BLE Trigger Daemon

Running this service, the rpi would act as peripheral and advertise. You would need to connect to the device and write a generated time-based token to service 'fff0' characteristic 'fff0' to unlock.

**Runtime Dependencies:**

* bluez
* pi-bluetooth (AUR)
* nodejs
* npm

**Install as systemd service:**

1. copy `index.js` and `package.json` to `/home/oursky/ble`
2. copy `doorlock-ble@.service` to `/etc/systemd/system/`
3. setup, enable and start the service:
```
[oursky ~/ble]$ npm install
[oursky ~/ble]$ sudo systemctl enable doorlock-ble@<your-secret>
[oursky ~/ble]$ sudo systemctl start doorlock-ble@<your-secret>
```

### Skygear Trigger Daemon

Listen for unlock requests from Skygear ...

### Home directory Backup
Backup of user:oursky home directory which contains the compiled code could be found on miniserver `/doc/doorlock.tgz`

## OpenSky App

Allow end users to trigger an unlock from a mobile device. Written using clojurescript on react-native.

**Dev Dependencies:**

* leiningen 
* npm
* re-natal (from npm)
* react-native-cli (from npm)
* android SDK (must set env `ANDROID_HOME`)
* android platform tools (adb)
* XCode (with CLI tools)
* rlwrap (optional, for figwheel REPL)

**Android Development:**
```
[~/doorlock/opensky/]$ npm install
[~/doorlock/opensky/]$ npm start                       # start react-native packager
[~/doorlock/opensky/]$ rlwrap lein figwheel android    # start figwheel dev server
[~/doorlock/opensky/]$ react-native run-android        # deploy app
[~/doorlock/opensky/]$ adb reverse tcp:8081 tcp:8081   # connect react-native
[~/doorlock/opensky/]$ adb reverse tcp:3449 tcp:3449   # connect figwheel
```

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