Update Serial.adoc

Author: karlsoderby

Language/Functions/Communication/Serial.adoc

@@ -31,9 +31,19 @@ Used for communication between the Arduino board and a computer or other devices
 | Nano 33 IoT               |                               | 0(RX0), 1(TX0)   |                     |                  |
 | Nano RP2040 Connect       |                               | 0(RX0), 1(TX0)   |                     |                  |
 | Nano BLE / BLE Sense      |                               | 0(RX0), 1(TX0)   |                     |                  |
-| Nano ESP32                |                               | 0(RX0), 1(TX0)   | Any free GPIO [1]   |                  |
 |================================================================================================================================================
 
+
+[options="header"]
+
+The Nano ESP32 board 
+
+|================================================================================================================================================
+| Board                     | Serial0 pins                   | Serial1 pins     | Serial2 pins        | Serial3 pins     | Serial4 pins
+| Nano ESP32                |                                | 0(RX0), 1(TX0)   | Any free GPIO [1]  |                   |
+|================================================================================================================================================
+
+
 * [1] The Nano ESP32 has a second hardware serial port available, but you need to specify the pins.