Replace the NFC controller in Nexus 7, which no longer supports reading Mifare Classic NFC 1 k Tags

In a review by Anandtech, it was found that the Nexus 4 makes use of the Broadcom BCM20793 NFC controller. all previous NFC-enabled Nexus devices (Nexus S, Galaxy Nexus, Nexus Q and Nexus 7), as well as the vast majority of non-Nexus Android phones, have made use of NXP's PN544 controller.7), as well as the vast majority of non-Nexus Android mobile phones, all use the PN544 controller of XP.

 

Too pitfall... Nexus 4 uses the NXP's PN544 controller, while in Nexus 7, Broadcom BCM20793 NFC controller is used, which causes the m1 card to not be read. Previously designed programs cannot run normally. Pay attention to the selection of devices in the future.