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Serial Hardware exceptions #947

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Dec 1, 2023
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Serial Hardware exceptions #947

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17 changes: 12 additions & 5 deletions Language/Functions/Communication/Serial.adoc
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Expand Up @@ -18,16 +18,23 @@ subCategories: [ "Communication" ]
=== Description
Used for communication between the Arduino board and a computer or other devices. All Arduino boards have at least one serial port (also known as a UART or USART), and some have several.
[options="header"]

|================================================================================================================================================
| Board | USB CDC name | Serial pins | Serial1 pins | Serial2 pins | Serial3 pins
| Uno, Nano, Mini | | 0(RX), 1(TX) | | |
| Mega | | 0(RX), 1(TX) | 19(RX), 18(TX) | 17(RX), 16(TX) | 15(RX), 14(TX)
| Leonardo, Micro, Yún | Serial | | 0(RX), 1(TX) | |
| UNO R3, UNO R3 SMD, UNO WiFi Rev2, UNO Mini Ltd, Mini| | | 0(RX), 1(TX) | |
| UNO R4 Minima, UNO R4 WiFi| | 18(RX), 17(TX) | | |
| Leonardo, Micro, Yún Rev2| Serial | | 0(RX), 1(TX) | |
| Uno WiFi Rev.2 | | Connected to USB | 0(RX), 1(TX) | Connected to NINA |
| MKR boards | Serial | | 13(RX), 14(TX) | |
| Zero | SerialUSB (Native USB Port only) | Connected to Programming Port | 0(RX), 1(TX) | |
| Nano ESP32 | | 14(RX), 15(TX) | | |
| Nano 33 BLE, Nano 33 BLE Sense, Nano 33 BLE Sense Rev2, Nano 33 IoT, Nano Every | | 17(RX), 16(TX) | | |
| Nano RP2040 Connect, Nano | | 2(RX), 1(TX) | | |
| MKR boards | Serial | | 22(RX), 23(TX) | |
| MKR Zero | SerialUSB (Native USB Port only) | Connected to Programming Port | 0(RX), 1(TX) | |
| Due | SerialUSB (Native USB Port only) | 0(RX), 1(TX) | 19(RX), 18(TX) | 17(RX), 16(TX) | 15(RX), 14(TX)
| 101 | Serial | | 0(RX), 1(TX) | |
| GIGA R1 WiFi | | | 24(RX), 23(TX) | 22(RX), 21(TX) | 20(RX), 19(TX)
| Mega 2560 Rev3 | | 18(RX), 17(TX) | 24(RX), 23(TX) | 22(RX), 21(TX) | 20(RX), 19(TX)
| Mega | | 0(RX), 1(TX) | 19(RX), 18(TX) | 17(RX), 16(TX) | 15(RX), 14(TX)
|================================================================================================================================================

On Uno, Nano, Mini, and Mega, pins 0 and 1 are used for communication with the computer. Connecting anything to these pins can interfere with that communication, including causing failed uploads to the board.
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