Code not working with Raspberry pi model B+

[mohamedbelhassen]

I would like to note that this code did not worked with the model B+
when executing (sudo python Read.py) I just got the following message:

Welcome to the MFRC522 data read example
Press Ctrl-C to stop.

when I touch the tag nothing happens.
Is there any diagnostic steps that I can follow to discover where is the bug?

[jozobozo301]

First check wires:

Name	Pin #	Pin name
SDA	24	GPIO8
SCK	23	GPIO11
MOSI	19	GPIO10
MISO	21	GPIO9
IRQ	None	None
GND	Any	Any Ground
RST	22	GPIO25
3.3V	1	3V3

If this is correct go to any tutorial and follow steps to install python-dev, enable SPI and change other settings on raspberry. If you are still stuck try to take fresh image and go by this tutorial; http://www.instructables.com/id/Raspberry-Pi-3-Model-B-MIFARE-RC522-RFID-Tag-Readi/

[koddr]

Similar problem. All wires are correct.

$ lsmod | grep spi

spidev             7373  4
spi_bcm2835        7596  0

[dingdayu]

Similar problem.
Board D1 indicator light,No response when approaching the card.

pi@raspberrypi:~/Dev/MFRC522-python $ lsmod | grep spi
spidev                 16384  0
spi_bcm2835            16384  0

pi@raspberrypi:~/Dev/MFRC522-python $ sudo apt-get install python2.7-dev
正在读取软件包列表... 完成
正在分析软件包的依赖关系树
正在读取状态信息... 完成
python2.7-dev 已经是最新版 (2.7.13-2+deb9u2)。
python2.7-dev 已设置为手动安装。
升级了 0 个软件包，新安装了 0 个软件包，要卸载 0 个软件包，有 1 个软件包未被升级。

[TJMurph]

I've got the same issues as the above - same reading as dingdayu. Followed the directions at http://www.instructables.com/id/Raspberry-Pi-3-Model-B-MIFARE-RC522-RFID-Tag-Readi/
No errors or anything - just doesn't read.

I've actually got two Raspberry pi's with the same problem. One a model B V1.2 (in black case in photos 1 and 2) and one a B+ 2017 (in clear case photos 3 and 4). They are wired identically and using the same colour scheme - I can't see any problem with the wiring and I've tried replacing the wires.

$ lsmod | grep spi
spidev 16384 0
spi_bcm2835 16384 0

Its powering up alright. I'm getting the following:

$ ls /dev/spi*
/dev/spidev0.0 /dev/spidev0.1

The config.txt is showing:

dtparam=spi=on

When I run lsmod I see:

$ lsmod
Module Size Used by
fuse 110592 3
rfcomm 49152 4
bnep 20480 2
hci_uart 36864 1
btbcm 16384 1 hci_uart
serdev 20480 1 hci_uart
bluetooth 368640 29 hci_uart,bnep,btbcm,rfcomm
ecdh_generic 28672 1 bluetooth
brcmfmac 307200 0
brcmutil 16384 1 brcmfmac
cfg80211 573440 1 brcmfmac
spidev 16384 0
rfkill 28672 6 bluetooth,cfg80211
snd_bcm2835 32768 1
snd_pcm 98304 1 snd_bcm2835
snd_timer 32768 1 snd_pcm
snd 69632 5 snd_timer,snd_bcm2835,snd_pcm
spi_bcm2835 16384 0
fixed 16384 0
uio_pdrv_genirq 16384 0
uio 20480 1 uio_pdrv_genirq
evdev 24576 6
i2c_dev 16384 0
ip_tables 24576 0
x_tables 32768 1 ip_tables
ipv6 434176 22

I'm at my wits end trying to get this to work now for an office access card system. Can I please have help?

[TJMurph]

Sorry should also add to the above that I've also tried two different RC522's. Currently got one hooked up to each pi but both having the same problem described at top of thread. All seems installed fine but not actually reading.

[ThomasWoeg]

Im not an expert, but the tutorial I followed suggested, that you have to enable bcm2708 instead of bcm 2835. I did that by adding the following line to the end of /boot/config.txt
dtoverlay=spi-bcm2708
Maybe you can try this, I hope this helps!

[TJMurph]

Thought that just related to the silicone of the chip itself which is different in the pi 3B. Since I'm out of ideas I gave it a go anyway though and still not working. Thanks for helping though.

[ThomasWoeg]

Well I bought a Raspberry Pi 3B+ two weeks ago and got it working following this git
https://github.com/mxgxw/MFRC522-python
So I'm not sure if your problem has something to do with it being a newer Pi

Edit: Nevermind, you're actually using the same library and did the same to implement it.

[ThomasWoeg]

I'm assuming you tried to run the Read.py file. What did that show?

[TJMurph]

Same as the initial post unfortunately:

Welcome to the MFRC522 data read example
Press Ctrl-C to stop.

when I touch the tag nothing happens.

[TJMurph]

I did have the same problem with the 3B (two pi's tried and 2 different RFID readers)

[TJMurph]

Would you possibly be able to post the read outs similar to the above you are getting with a working version please? Maybe I can work it out from there.

[ThomasWoeg]

Have you tried debugging or putting prints in the MFRC library, to see exactly which step, seems to be not working?

[TJMurph]

Didn't hit any problems along the way when installing. Just didn't work at the end.

[ThomasWoeg]

Would you possibly be able to post the read outs similar to the above you are getting with a working version please? Maybe I can work it out from there.

Im not sure that I understand what you want from me, but this is the output I get (when it's working)

pi@raspberrypi:~/MFRC522-python $ sudo python Read.py
Welcome to the MFRC522 data read example
Press Ctrl-C to stop.
Card detected
Card read UID: 69,245,238,117
Size: 8
Sector 8 [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]

[TJMurph]

Could you tell me how things look when you run lsmod?

[TJMurph]

and confirm that you are using the
Stretch Version: 2.8.2
Release date: 2018-06-27

[ThomasWoeg]

my lsmod output

pi@raspberrypi:~ $ lsmod
Module Size Used by
rfcomm 49152 6
bnep 20480 2
hci_uart 36864 1
btbcm 16384 1 hci_uart
serdev 20480 1 hci_uart
bluetooth 368640 29 hci_uart,bnep,btbcm,rfcomm
ecdh_generic 28672 1 bluetooth
fuse 106496 3
binfmt_misc 20480 1
evdev 24576 6
joydev 20480 0
spidev 16384 0
brcmfmac 307200 0
brcmutil 16384 1 brcmfmac
cfg80211 573440 1 brcmfmac
rfkill 28672 6 bluetooth,cfg80211
snd_bcm2835 32768 1
snd_pcm 98304 1 snd_bcm2835
snd_timer 32768 1 snd_pcm
snd 69632 5 snd_timer,snd_bcm2835,snd_pcm
spi_bcm2835 16384 0
uio_pdrv_genirq 16384 0
fixed 16384 0
uio 20480 1 uio_pdrv_genirq
i2c_dev 16384 0
ip_tables 24576 0
x_tables 32768 1 ip_tables
ipv6 434176 22
how do i lookup the version?

[TJMurph]

If you bought it two weeks ago and downloaded the latest image rather than an old one it’ll be that

[TJMurph]

Thank you - you’ve been very helpful

[ThomasWoeg]

yeah i downloaded the latest image, and even did an apt-get update IIRC

[TJMurph]

Only lines I can see that differ are:
fuse 110592 3 fuse 106496 3
rfcomm 49152 4 rfcomm 49152 6
...then you have the following that I don't at all:
binfmt_misc 20480 1
joydev 20480 0

Unfortunately I lack the skills to know any more about why yours works and mine doesn't.

[ThomasWoeg]

What type of RFID tags do you have?

I noticed that MIFARE DESfire EV1 dont work, but EV2 do work

Edit: You can check which ones you exactly have with an android app (NXP Tag Info for example) if your smart phone has NFC

[TJMurph]

Same ones that came with the RFID-RC522 devices

[ThomasWoeg]

That means that they should work.... Then I'm out of ideas. Sorry!

[TJMurph]

I appreaciate the help anyway. Seems unlikely to be hardware problems on two different pi's with two different RC522's.

[Mohanavadivel-git]

I am also facing the same problem with raspberry pi B+...When RFID tag says it works at 13.56Mhz, do we need to configure this frequency in the code, bcoz the spi speed is set to 1Mhz? i tried but it didn't work, any other ideas to make it work

[Erjona1]

Hello,
has anyone been able to solve this?
I am having the exact same issue.
I installed successfully but i cant make it read :/

[mohamedbelhassen]

Hello, In my case, the problem was the RFID board itself. I just used another one from another seller and it worked fine Le jeu. 23 mai 2019 à 10:45, Erjona1 <notifications@github.com> a écrit :

…

Hello, has anyone been able to solve this? I am having the exact same issue. I installed successfully but i cant make it read :/ — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#40?email_source=notifications&email_token=ACE7BMBJ2IZQEHFUJU7HK4TPWZRS3A5CNFSM4DIVKMQ2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODWBVTLY#issuecomment-495147439>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ACE7BMD4LEEUEFU4GUX5NC3PWZRS3ANCNFSM4DIVKMQQ> .

[obdbeats]

I was facing the same problem with MFRC522 and i just solve it connecting the RC522 IRQ pin into PIN 18 of GPIO

[deatheater01]

Still not working.
@obdbeats

[obdbeats]

Still not working.
@obdbeats

Yes! It works for me! ;) Keep trying Bro!

[alexanderzirl]

Does not work for me. Any other ideas? Any test methods I could use?