добавлены комментарии по выбору пинов для разных плат. Для стартовых примеров добавлен ifdef для автоматического задания корректных выводов

libraries/SoftwareSerial/examples/TwoPortReceive/TwoPortReceive.ino

@@ -17,17 +17,22 @@
  * Second serial device's TX attached to digital pin 8(RX), RX to pin 10(TX)
 
  Note:
- Not all pins on the Elbear Ace-Uno support interrupts,
- so only the following can be used for RX:
- 2, 3, 4, 5, 8, 9
+ Not all pins on the Elbear Ace-Uno/Ace-Nano support interrupts,
+ so only the following can be used for RX: 2, 3, 4, 5, 8, 9
+ Elsomik board pins with interrupts: P0_8, P1_4, P1_5, P1_6, P1_9, P1_10, P1_15, P2_7
+ Start board pins with interrupts: P0_10, P0_12, P0_13, P0_14, P0_15, P1_9, P1_15
  */
 
 #include <SoftwareSerial.h>
 
 // software serial #1: RX = digital pin 2, TX = digital pin 6
-SoftwareSerial portOne(2, 6);
+int rx_pin_1 = 2; // P1_9 for Start/Elsomik
+int tx_pin_1 = 6; // P0_2 for Start/Elsomik
+SoftwareSerial portOne(rx_pin_1, tx_pin_1);
 // software serial #2: RX = digital pin 8, TX = digital pin 10
-SoftwareSerial portTwo(8, 10);
+int rx_pin_2 = 8;  // P1_15 for Start/Elsomik
+int tx_pin_2 = 10; // P1_3 for Start/Elsomik
+SoftwareSerial portTwo(rx_pin_2, tx_pin_2);
 
 // active port is changed by user button pressing
 volatile bool isPortOneActive = true;