Update modules.md

Author: samuk

modules.md

@@ -4,9 +4,22 @@ A professionalised https://github.com/luisllamasbinaburo/OpenRobot_V2/wiki/Modul
 
 Using a fast STM https://oshwlab.com/ottello/stm32h750 for uROS or other low layer control (Lizard)
 
-From this most things can be I2C via Qwiic, using the 20x20 mount holes, eg motor controller.
+We need 
+- encoder in x 4
+- IMU
+- Lidar
+- Mikrobus small header
+- CANBUS
+
+From this most things, can be I2C via Qwiic, using the 20x20 mount holes, eg servos, motor controller.
+ 
+For more pro stuff this needs to swap to CANBUS, BLDC.
+
+Power distro is also a thing.
+
+Arm controller: https://oshwlab.com/quirin.forster21/open-flight-computer-proton
+
 
-For more pro stuff this needs to swap to CANBUS.