-
Notifications
You must be signed in to change notification settings - Fork 1.4k
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
multiple RFID 552 scanners problem #263
Labels
Comments
Check voltage drop in your 3.3v or 5.0v, looks like you are exceeding the maximum current and this is causing malfunction in your setup.
Good luck!
Enviado desde BlueMail
En 26 nov. 2016 21:14, en 21:14, propiro <[email protected]> escribió:
…Hello,
While using this library, im getting really weird results. I must
connect 5 scanners to one arduino. My scanners share MISO SCK MOSI and
power lines, and when i connect 1 or 2, they work as expected, but when
i connect 3,4,5, all of them stop working - only if i disconnect MISO
lines of any 3 of them, it'll make other two work.
At this point im clueless, i've tried using voltage of 3.3, 5v, using 5
to 3.3v stabilizers, basically anything i can thing of. I've tried two
MEGA arduinos, one leonardo and one UNO, on all of them i have similiar
problem.
https://nopaste.linux-dev.org/?1120284
here is code, from multireader example, with added 5 scanners.
--
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
#263
|
In general my experience with spi:
Try:
or
The correct way to use multiple devices is to use a multiplexer. (see #191 (comment)) |
@propiro Did you solved your problem? Can you share your experience with us? Otherwise I will close this issue within 14 days. Thanks. |
Hello,
Sadly, it was caused by noise on MISO lines, and i was unable to solve it,
using multiplexing or transistor gates. Client i was makign this project
for agreed just to but 5 cheap arduinos, so i hook them together to one
arduino mega that controlled locks, and everything worked.
Best Regards,
A.
2016-12-23 23:51 GMT+01:00 Rotzbua <[email protected]>:
… @propiro <https://github.com/propiro> Did you solved your problem? Can
you share your experience with us? Otherwise I will close this issue within
14 days. Thanks.
—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub
<#263 (comment)>,
or mute the thread
<https://github.com/notifications/unsubscribe-auth/AUF2add90UbvCvnja8U2rViHR6T_A8GRks5rLFBsgaJpZM4K9DQu>
.
|
@propiro Cool! Thanks for sharing your knowledge with us. Merry Christmas. |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Labels
Hello,
While using this library, im getting really weird results. I must connect 5 scanners to one arduino. My scanners share MISO SCK MOSI and power lines, and when i connect 1 or 2, they work as expected, but when i connect 3,4,5, all of them stop working - only if i disconnect MISO lines of any 3 of them, it'll make other two work.
At this point im clueless, i've tried using voltage of 3.3, 5v, using 5 to 3.3v stabilizers, basically anything i can thing of. I've tried two MEGA arduinos, one leonardo and one UNO, on all of them i have similiar problem.
https://nopaste.linux-dev.org/?1120284
here is code, from multireader example, with added 5 scanners.
The text was updated successfully, but these errors were encountered: