UART < IoT_Course_English

---+ Using a second UART

On the ESP32 UART0 is normally reserved for interactive use with REPL. Sometimes we need a UART to communicate with external devices. Typical examples are:
   * fingerprint readers using a serial communication protocol
   * GPS modules
The ESP32 has 3 UARTs of which however UART1 is reserved for use with flash memory. *However UART2 is free.*

Connect the USB to Serial adapter to the ESP32 as shown in the table below
|  USB to Serial adapter  |  ESP32 GPIO  |
|  Tx  |  16  |
|  Rx  |  17  |
|  Gnd  |  Gnd  |

-- %USERSIG{UliRaich - 2020-05-09}%

---++ Comments

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Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
ods	ESP32.ods	r1	manage	21.4 K	2020-05-09 - 19:32	UliRaich

This topic: IoT_Course_English > WebHome > UART
Topic revision: r2 - 2020-05-09 - UliRaich