Distance between Cyton board and Dongle of Ultracortex Mark Ⅳ
Hello~
If the lithium battery was used for Ultracortex Mark Ⅳ, the Cyton board and lithium battery can be put in the board case and set on Mark Ⅳ. Then we can get a mobile EEG device. However, how do we keep close distance between the Cyton board and Dongle to get a stable signal with less noise？
Thank you very much.
Comments
The radio signal strength should be adequate for at least several meters, up to one or two rooms distance.
If you are having noise issues, it could also be due to other wifi / bluetooth transmitters in your area. One strategy to reduce noise level is to use a usb extension cord to position the dongle closer to the Cyton mainboard.
OK. Thank you for your support.
If I use a USB extension cord, does it influence the signal?
Thank you very much.
No, it makes the radio signal stronger, because the dongle is now closer to the mainboard.
OK. Thank you very much.
I have a problem with the stability of the connection between the dongle and the cyton board.
When I measured EEG for 120 seconds twice, I noticed packet losses for 4 and 11 times respectively.
The experimental setup is shown as the image (IMG 3722), and the distance between the dongle and the board is around 60cm.
I assumed that my head should be an obstacle for the bluetooth communication, I tested my assumption as follows.
First, I turn my body 90 degree to direct to the right, and measured EEG for 120 seconds twice, but the packet losses occurred again for 119 and 5 times respectively. ( IMG 3723, the distance between the dongle and the board is around 50 cm )
Next, I turn my body 180 degree and make there not to be any obstacles between the dongle and the board. Then, no packet loss occurred for 120 seconds EEG measurement x 2. ( IMG 3726, the distance between the dongle and the board is around 40 cm )
Finally, I placed the cyton board and the battery at the front-top of the ultracortex using a surgical tape. This makes no packet loss for 120 seconds EEG measurement x 2. ( IMG 3730 and IMG 3728, the distance between the dongle and the board is around 45 cm )
I’m going to create own OpenBCI headset using 3D printer.
What should I be careful about creating a headset, the position and angle of the board to make the bluetooth connection stable?