Specifying espressif32 platform version explicitely

jozala · jozala · commit 7e3f38be5525 · 2019-06-21T00:15:15.000+02:00
This is required to make Ethernet library compile (see espressif/arduino-esp32#2755)
diff --git a/platformio.ini b/platformio.ini
@@ -9,7 +9,7 @@
 ; https://docs.platformio.org/page/projectconf.html
 
 [env:esp32doit-devkit-v1]
-platform = espressif32
+platform = espressif32@1.6.0
 board = esp32doit-devkit-v1
 framework = arduino
 lib_deps = 
