Bacause Pin 9 and 10 (U1Rx and U1Tx) were used for flash chip. To use UART1 in ESP32, You can remap Rx and Tx by using bellow instruction:
Serial1.begin(9600, SERIAL_8N1, 4, 2);
I hope it a little bit help you.!!!
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- Wed Jun 02, 2021 5:25 am
- Forum: Hardware
- Topic: ESP32 UART1 problem
- Replies: 11
- Views: 18645