Project Bazaar

Thursday, July 13, 2023, 14:00 - 16:00 at the DFKI VisCenter (Entry next to Mensa)

Your project must be ready to run by 14:15. You can enter the DFKI VisCenter starting at 13:30 (see image below for entry). Your poster marks your place. The Bazaar will end at 15:45.

~~When you can make your project ready to run before 14:15 or stay longer than 15:45, please write me! That would relax the schedule and you would be allowed to leave earlier/come later.~~

There will be several people there to review the projects. Due to the number of projects, you have ~~about 5~~ 4 minutes to demonstrate your project to the TA and present the points from the checklist. If you have added more/other functions, you should also present them within the 5 4 minutes. You should only present the features you implemented, you don't need to talk about your use cases or motivation. So be prepared! ~~There will be a time plan.~~ See the timeplan under this section. Other peoples from our chair and the tutors will also take a closer look at your project without the 4min restriction. They may have specific questions or want to discuss something with you (what is also relevant for grading). ~~Depening on how many groups can come earlier/stay longer, the timeframe can extend.~~

If your project has waiting times (e.g. because a timer is running), you may shorten it for demonstration purposes, even if this contradicts regular usage.

All team members must be present! There should always be at least two team members at your project stand. The other team members are welcome to look at the results of other groups.

You must bring your own power supply (e.g. power bank, Notebook). If you need internet, make a hotspot with your smartphone. There is eduroam, but availability is not guaranteed (and you have to add @uni-saarland.de to your username in order to access the eduroam WiFi). If you have any other special requests, please make them as early as possible!

Since many people use WiFi and everybody should have a good experience, the following mandatory regulations apply:

Take your team number % 3. Use the resulting number to determine your WiFi channel to use:
0 = Channel 1
1 = Channel 6
2 = Channel 11
E.g. you are team 5, so 5 % 3 = 2. You should use channel 11. Do not use any other channel!
Below are instructions on how to configure the WiFi channel
Set the transmission power as low as possible! You only need a WiFi range of 1-2m, so the lowest setting is just fine.
Set channel bandwidth to 20MHz

Please add your project title and team number to the poster (like in the written report). There are no other requirements regarding logos or similiar, you are completely free with the design as long as it is appropriate. You should be able to present your project well with it. Remember that the printout is on A3. Avoid blocks of text.

You can return the hardware after the Bazaar (I am there until 17:00 at the VisCenter or my office +1.73 DFKI) or after the exam, re-exam or exam inspections.

Timeplan

Start	End	Team
14:09:00	14:12:59	#16
14:15:00	14:18:59	#2
14:19:30	14:23:29	#21
14:24:00	14:27:59	#25
14:28:30	14:32:29	#18
14:33:00	14:36:59	#17
14:37:30	14:41:29	#10
14:42:00	14:45:59	#19
14:46:30	14:50:29	#5
14:51:00	14:54:59	#12
14:55:30	14:59:29	#3
15:00:00	15:03:59	#15
15:04:30	15:08:29	#8
15:09:00	15:12:59	#28
15:13:30	15:17:29	#13
15:18:00	15:21:59	#14
15:22:30	15:26:29	#26
15:27:00	15:30:59	#23
15:31:30	15:35:29	#7
15:36:00	15:39:59	#24
15:40:30	15:44:29	#6

Set WiFi Channel / Transmit Power on ESP8266

Add the following code to set the channel and transmit power on your ESP8266:

WiFi.softAP("ESP-Hotspot", "your-password", YOUR_CHANNEL_HERE); // values between 0.0 and 20.5 in 0.5 steps (dBm) WiFi.setOutputPower(1);

A transmit power of 1 dBm should be totally fine. Of course if for some reason you need more power, just set it to a higher value.

Note: you only need to set the WiFi channel on the (Soft)AP part, but the transmit power on every ESP.

Set WiFi Channel on Android

Check the configuration of the WiFi Hotspot. Under Android it is often called "Broadcast Channel" and maybe hidden under the "advanced configuration" option. Change this to your assigned WiFi Channel.

Overview WiFi Channels

With 20MHz bandwidth, the channels 1, 6 and 11 are overlap free. In Germany also channel 14 is useable, but not supported by every device (since this channel is illegal in North America)

DFKI VisCenter