We would like to build a PCB that can house Bluetooth, battery and OLED. This device is capable of displaying a QR code on the OLED. BLE is used to notify the person when the device is near. No RFID and e-ink display has been changed to oled.
Here is the reference.:
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18 freelancer chào giá trung bình$1101 cho công việc này
Hi Sir, Lets talk to me about this project. I am an expert PCB Designer and i can help you on making products like this. Looking positive to work with you. Regards, Ahmad