Add/fix some documentation

lib/obp60task/README

@@ -23,6 +23,18 @@ Differences to OBP60
 + SD card interface
 
 
+GPIO assignments
+----------------
+
+NMEA0183
+  IO9  - RS485 TX
+  IO14 - RS485 RX
+
+NMEA2000/CAN
+  IO15 - CAN TX
+  IO16 - CAN RX
+
+
 Keyboard
 --------
 

lib/obp60task/obp60task.h

@@ -19,7 +19,7 @@
         #define ESP32_CAN_TX_PIN 15
         #define ESP32_CAN_RX_PIN 16
         // Bus load in 50mA steps
-        #define N2K_LOAD_LEVEL 2 // 5x50mA = 100mA max bus load with back light on
+        #define N2K_LOAD_LEVEL 2 // 2x50mA = 100mA max bus load
         // RS485 NMEA0183
         #define GWSERIAL_TX 9
         #define GWSERIAL_RX 14
@@ -37,4 +37,4 @@
     DECLARE_USERTASK_PARAM(OBP60Task, 35000);   // Need 35k RAM as stack size
     DECLARE_CAPABILITY(obp60,true);
     DECLARE_STRING_CAPABILITY(HELP_URL, "https://obp60-v2-docu.readthedocs.io/de/latest/"); // Link to help pages
-#endif
+#endif