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[Khanh]

You are welcome

[Khanh]

Yes. And take a look to other comment I posted recently.

[Khanh]

You can used any unused pin on Arduino for SS pin. It is defined by you. For example, pin 10 is used by default for SS pin of PHPoC shield. and you can...

[Khanh]

I took a close look to your picture. You have not change SS_PIN.
It only works when you change SS pin on both code and real wiring

[Khanh]

That is because two devices use the same SPI bus. The SPI allows multiple devices share the same bus, as long as they use the different SS pin. I would...

[Khanh]

This error is related to RFID-RC522 module. I suggest you to contact the RFID-RC522 provider...

[Khanh]

Both RFID-RC522 and PHPoC shield uses SPI. By default, it can not work together. Fortunately, you can make it work by changing the SS connected to RFID-RC522....

[Khanh]

Could you please:

• Keep power Arduino and connect PHPoC Shield to PHPoC Debugger? You can download PHPoC debugger here. And this is instruction.
• Click

...

[Khanh]

Could you please reboot Arduino and show me all log on Serial Monitor?

[Khanh]

No, the Wi-Fi configuration is stored in Flash memory. It is kept when there is no power. You only need to send once. You can test it.

[Khanh]

That error means you have not configured the WiFi network for PHPoC Shield. Please see the this instruction to config WiFi information: