Action Item #677


Add hostapd to laptop for Maker Faire.

Added by Hammel over 5 years ago. Updated over 5 years ago.

Maker Faire
Target version:
Start date:
16 Sep 2018
Due date:
% Done:


Estimated time:
02 - High


I need the laptop to be able to run it's own AP so the monitor can connect to it.
Then I need to verify that Jarvis can communicate with the monitor over that subnet.

Actions #1

Updated by Hammel over 5 years ago

  • Severity changed from 05 - Very Low to 02 - High
Actions #2

Updated by Hammel over 5 years ago

  • % Done changed from 0 to 50

This turned out to be a lot more than just hostapd (which by itself was easy).

  1. I've upgraded the Chromebook to F27 because F24 didn't have espeak-ng, only espeak which was a very slow-talking playback. After upgrading to F27 and installing espeak-ng, Jarvis can talk normally now.
  2. The Chromebook only has 2GB of memory, which makes it reeeeeally slow, especially for Java. So I've ordered 8GB for it. I could go as high as 16GB but I think 8GB should be enough for the demo.
  3. I installed all security features: (ipsets), fail2ban, and logwatch along with an ordinary firewall.
  4. I got create_ap working to setup a closed AP for the monitor.

After all this I discovered that the monitor was no longer accepting multicast from Jarvis. So I'm building a fresh monitor install while hanging onto the old one, just in case. But while doing that I realized that the problem might be routing. So I added this route:

ip route add dev wlp0s29u1u4

Which forces the multicast address on to the temporary wifi. And that worked. So now I need to update my create_ap wrapper to include adding the route, which means background create_ap waiting for the interface to come up and then adding the route - I think. Maybe I can add the route even before it's got an IP. Anyway, there is some work there to be done.

After that I need to verify that the IoT device works with this setup.
Then I need to verify it all works even if the Chromebook is hooked up to the Internet.

Actions #3

Updated by Hammel over 5 years ago

  • Status changed from New to In Progress
  • % Done changed from 50 to 60

So it's working now but maybe a little flakey. pisensors started removing registrations when I hit the enable toggle button on the touchscreen. Rebooting and (by accident) reconfiguring the network cleared that and it started working properly. No idea how I got into that mess.

So now I have the ability to use the Chromebook as an AP and route Jarvis commands to the monitor. That seems to work now. I have been able to turn the lights on and off that way. So both Jarvis and pisensors can control the light.

So that's the Maker Faire Ironman demo. I need to move the IoT boards plus hub off of galileo and onto the Chromebook to make sure that works (so I can watch the output with minicom). I don't have any more USB ports available (only two - currently taken up by the Snowball mic and the TP-Link wifi stick). I need to pick a powered hub and try it to make sure it still works.

I should probably verify that the current setup works repeatedly after power cycling each component and layout a detailed setup guide for getting the demo going like this, then try it with a hub.

Actions #4

Updated by Hammel over 5 years ago

  • % Done changed from 60 to 90

All hardware moved to being based on chromebook plus external hub. Tested repeatedly. Fixed minor bug in pisensors (don't use button_press event if using touchscreen). Everything is working fine now, including Jarvis.

I also did a dry run setup in the living room and everything came up and runs fine. Everything is now packed and ready for the MakerFaire.

Code may not be pushed. Will leave this open in case there is code in pisensors that needs to be pushed (chromebook is packed). Will close after MakerFaire.

Actions #5

Updated by Hammel over 5 years ago

  • Status changed from In Progress to Closed
  • % Done changed from 90 to 100

All updates pushed. Closing issue.


Also available in: Atom PDF