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Installing the Raspberry Pi
We need to set up the internal wifi hardware so it's used as an access point, this is an authenticated ad-hoc node. The external wifi dongle is used for normal internet access (as setting this up as a access point is hard/difficult/impossible).
Following most of this:
https://frillip.com/using-your-raspberry-pi-3-as-a-wifi-access-point-with-hostapd/
We use hostapd and dnsmasq. Switching 172.24.1.1 for 192.168.2.1 (what the mongoose app and server expect) and changing ip ranges etc to match. Name the ssid "mongoose-web" with no password.
No need to do "Set up IPv4 forwarding"
Todo - put config files in repo
Check once this is done check that "mongoose-web" exists and you can connect to it externally.
Install racket:
sudo apt-get install racket
Then clone the mongoose git repo:
git clone git@github.com:fo-am/mongoose-2000.git
Go into mongoose-2000/web and test the server:
./server.scm 8888
This will take ages the first time as it download and installing further dependencies silently.
More stuff needed:
sudo apt-get install daemontools
"supervise" is used to start and check the server, restarting it in case of crashes.
Add a line to crontab (crontab -e):
@reboot supervise /home/pi/mongoose-2000/web
Reboot...
Once booted connect externally to mongoose-web and visit this URL:
http://192.168.2.1:8888/
Should say: "hello there"
or even:
http://192.168.2.1:8888/mongoose
"malformed thingy"
Final check is to use the app to syncronise, if it's a clean database a tablet should start the process of dumping all it's data into the Pi as it detects it doesn't have the data.
Stop the server:
killall supervise
ps -ef | grep server
kill -9 XXX
Then start it manually, dumping to stdout:
./server.scm 8888