Inspired by https://oshwhub.com/Giftina/ESP8266_CARD , rewiring, optimizing many circuit designs, adding RFID function, and using COB (chip on board) modules such as UID/CUID to realize RFID function, which can replace Nodemcu. For schematic diagram and partial PCB design, please refer to https://oshwhub.com/jixin003/iot_board_esp12 . Please add the font in the attachment, otherwise the logo may not be displayed properly. The font editing software is also in the attachment.
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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.
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