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Results tagged with uart
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user 49068
A UART is a Universal Asynchronous Receiver/Transmitter. This refers to the "hardware" serial port in the processor. Use this tag for questions about hardware serial.
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Serial communication between nodemcu and Arduino Uno
Arduino UNO is 5v logic and esp8266 is 3.3v logic. You need a level shifter for them to be able to have bidirectional serial link. Alternatively you can just use a voltage divider between Arduino Tx …