I have used both the NFC and WizFi Shields, I used Basic server test sketch and read mifare sketch, the moment I connect the server with the PC software the the server did not work and if I test with the ping command i get only reset timeout error, but the NFC cards are reading. If i exclude the NFC card read then the WizFi server works and transfer data from PC
what could be the bug
ADAFRUIT NFC + WizFi
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- adafruit_support_rick
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- Joined: Tue Mar 15, 2011 11:42 am
Re: ADAFRUIT NFC + WizFi
Not familiar with WizFI. Do you have to poll it regularly? nfc readPassiveTargetID is a blocking call, so it will prevent you from polling WizFi.
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Re: ADAFRUIT NFC + WizFi
thanks let me check and come back
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Re: ADAFRUIT NFC + WizFi
Is there any interrupt driven sample code available?
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Re: ADAFRUIT NFC + WizFi
I checked the readPassiveTargetID routine in SPI mode looks like that it is not blocking routine ...
Am i right i have copied the routine below for your ref
Am i right i have copied the routine below for your ref
Code: Select all
***** ISO14443A Commands ******/
/**************************************************************************/
/*!
Waits for an ISO14443A target to enter the field
@param cardBaudRate Baud rate of the card
@param uid Pointer to the array that will be populated
with the card's UID (up to 7 bytes)
@param uidLength Pointer to the variable that will hold the
length of the card's UID.
@returns 1 if everything executed properly, 0 for an error
*/
/**************************************************************************/
boolean Adafruit_PN532::readPassiveTargetID(uint8_t cardbaudrate, uint8_t * uid, uint8_t * uidLength) {
pn532_packetbuffer[0] = PN532_COMMAND_INLISTPASSIVETARGET;
pn532_packetbuffer[1] = 1; // max 1 cards at once (we can set this to 2 later)
pn532_packetbuffer[2] = cardbaudrate;
if (! sendCommandCheckAck(pn532_packetbuffer, 3))
return 0x0; // no cards read
// read data packet
readspidata(pn532_packetbuffer, 20);
// check some basic stuff
/* ISO14443A card response should be in the following format:
byte Description
------------- ------------------------------------------
b0..6 Frame header and preamble
b7 Tags Found
b8 Tag Number (only one used in this example)
b9..10 SENS_RES
b11 SEL_RES
b12 NFCID Length
b13..NFCIDLen NFCID */
#ifdef MIFAREDEBUG
Serial.print("Found "); Serial.print(pn532_packetbuffer[7], DEC); Serial.println(" tags");
#endif
if (pn532_packetbuffer[7] != 1)
return 0;
uint16_t sens_res = pn532_packetbuffer[9];
sens_res <<= 8;
sens_res |= pn532_packetbuffer[10];
#ifdef MIFAREDEBUG
Serial.print("ATQA: 0x"); Serial.println(sens_res, HEX);
Serial.print("SAK: 0x"); Serial.println(pn532_packetbuffer[11], HEX);
#endif
/* Card appears to be Mifare Classic */
*uidLength = pn532_packetbuffer[12];
#ifdef MIFAREDEBUG
Serial.print("UID:");
#endif
for (uint8_t i=0; i < pn532_packetbuffer[12]; i++)
{
uid[i] = pn532_packetbuffer[13+i];
#ifdef MIFAREDEBUG
Serial.print(" 0x");Serial.print(uid[i], HEX);
#endif
}
#ifdef MIFAREDEBUG
Serial.println();
#endif
return 1;
}
Last edited by adafruit_support_rick on Sat Dec 13, 2014 10:08 am, edited 1 time in total.
Reason: please use Code tags when posting code (</> button)
Reason: please use Code tags when posting code (</> button)
- adafruit_support_rick
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Re: ADAFRUIT NFC + WizFi
Code: Select all
if (! sendCommandCheckAck(pn532_packetbuffer, 3))
Code: Select all
if (! sendCommandCheckAck(pn532_packetbuffer, 3, 10))
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Re: ADAFRUIT NFC + WizFi
I have made the corrections still the WizFi wireless shield is getting disconnected the moment i give a connect command from PC Client software
But the Mifare card reading is working perfectly ...
till i give the CONNECT command I am able to read the card as well as able to get responses for the PING command from PC
But the Mifare card reading is working perfectly ...
till i give the CONNECT command I am able to read the card as well as able to get responses for the PING command from PC
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Re: ADAFRUIT NFC + WizFi
Sorry I made the corrections in Sketch folder but library folder also has this file so when I changed as per your suggestion it works now
Thank you very much for the timely help
Thank you very much for the timely help
- adafruit_support_rick
- Posts: 35092
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Re: ADAFRUIT NFC + WizFi
Great!
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Re: ADAFRUIT NFC + WizFi
The WizFi and NFC shield are working fine as long as the serial port is open. Once I disconnect the connection / physically remove the serial cable, the NFC shield stops working. I am required to reset the board for the NFC to start working.
What could be the bug here?
What could be the bug here?
- adafruit_support_rick
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- Joined: Tue Mar 15, 2011 11:42 am
Re: ADAFRUIT NFC + WizFi
I don't think I'm following - what serial cable? I thought you had two shields stacked?
Could you post a picture of your setup?
Could you post a picture of your setup?
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Re: ADAFRUIT NFC + WizFi
It is the USB cable from Mega board to PC
I call it as serial cable .... serial port
I call it as serial cable .... serial port
- adafruit_support_rick
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- Joined: Tue Mar 15, 2011 11:42 am
Re: ADAFRUIT NFC + WizFi
Oh, OK. So you have the Mega connected to both external power from the barrel jack, and to USB, right? And when you pull the USB, the system hangs? Then if you reset it with the USB cable unplugged, the system works again?
What external power supply are you using? How many volts?
What external power supply are you using? How many volts?
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Re: ADAFRUIT NFC + WizFi
Yes you are right ... external supply 12V .. when USB cable is unplugged the card reading hangs ... only when USB is plugged the card reading works.. the external power supply can supply more than 2 A
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: ADAFRUIT NFC + WizFi
I can't think of anything that would cause that except possibly a bad external power supply, or a bad voltage regulator on your Mega. Do you have a different supply you can try?
Please be positive and constructive with your questions and comments.