Added ESP32, fixed definitions not being recognized because of missing library dependency finder configuration

see https://docs.platformio.org/en/latest/librarymanager/ldf.html#dependency-finder-mode

Author: Andre Stefanov

Software/Arduino code/OpenAstroTracker/TimerInterrupt.cpp

@@ -25,7 +25,7 @@
     1.0.1   K Hoang      16/11/2019 Add long timer feature, clean up, higher accuracy
     1.0.2   K Hoang      28/11/2019 Permit up to 16 super-long-time, super-accurate ISR-based timers to avoid being blocked
 ****************************************************************************************************************************/
-#if !defined(ESP8266) 
+#if !defined(ESP8266) && !defined(ESP32)
 
 #define TIMER_INTERRUPT_DEBUG      0
 #include "TimerInterrupt.h"

Software/Arduino code/OpenAstroTracker/platformio.ini

@@ -13,7 +13,10 @@ src_dir = .
 
 [env]
 framework = arduino
+lib_ldf_mode = chain+
 lib_deps = 
+	SPI
+	Serial
 	LiquidCrystal
 	AccelStepper
 	EEPROM
@@ -22,7 +25,6 @@ lib_deps =
 [env:mega2560]
 platform = atmelavr
 board = megaatmega2560
-framework = arduino
 
 [env:uno]
 platform = atmelavr
@@ -35,4 +37,8 @@ lib_deps =
 	LiquidCrystal
 	AccelStepper
 	EEPROM
-	ESP8266WiFi
+	ESP8266WiFi
+
+[env:esp32]
+platform = espressif32
+board = esp32dev