Update modules.md

Author: samuk

modules.md

@@ -2,15 +2,16 @@ For reproducable robots larger than Rosmo a modular system makes sense https://a
 
 A professionalised https://github.com/luisllamasbinaburo/OpenRobot_V2/wiki/Module_I2C_GPIO 
 
-Using a fast Olimex P4 for uROS or other low layer control (Lizard)
+Using a fast Olimex P4 for uROS or other low layer control (Lizard) Via UART from SBC or Ethernet.
 
 We need 
 - encoder in x 4
 - IMU (bunch of Qwiic)
 - Lidar header
 - Mikrobus small header
-- CANBUS to SimpleFOC motors
+- CANBUS to SimpleFOC motors 
 - UEXT for relays https://www.olimex.com/Products/Modules/IO/MOD-IO/open-source-hardware
+- Headers for pololu https://www.pololu.com/product/1213/specs / clone https://oshwlab.com/mephistopheles.loki/mc33926-dual-driver-ardumower
 
 From this most things, can be I2C via Qwiic, using the 20x20 mount holes, eg servos, motor controller.