diff --git a/README.md b/README.md
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--- a/README.md
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@@ -1,3 +1,5 @@
 # airseeder-firmware
 
-Firmware for the two ESP32 modules in the airseeder control box
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+Firmware for the two ESP32 modules in the airseeder control box. 
+
+This project is intended to be loaded with PlatformIO. There are two build environments configured (`primary-esp32` and `motor-esp32`), one for each of the two ESP32 modules.
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