add initial guess at TBEAM 0.7 hardware support

platformio.ini

@@ -68,11 +68,20 @@ lib_deps =
   https://github.com/meshtastic/arduino-fsm.git 
   https://github.com/meshtastic/SparkFun_Ublox_Arduino_Library.git
 
+; The 1.0 release of the TBEAM board
 [env:tbeam] 
 board = ttgo-t-beam
 lib_deps =
   ${env.lib_deps}
   AXP202X_Library
+build_flags = 
+  ${env.build_flags} -D TBEAM_V10
+
+; The original TBEAM board without the AXP power chip and a few other changes
+[env:tbeam0.7] 
+board = ttgo-t-beam
+build_flags = 
+  ${env.build_flags} -D TBEAM_V07
 
 [env:heltec]
 ;build_type = debug ; to make it possible to step through our jtag debugger