add build for d1_mini

platformio.ini

@@ -19,5 +19,10 @@ lib_deps_external =
 
 [env:nodemcuv2]
 platform = espressif8266
+framework = arduino
 board = nodemcuv2
+
+[env:d1_mini]
+platform = espressif8266
 framework = arduino
+board = d1_mini