diff --git a/comms/Arduino/MasterCode/MasterCode.ino b/comms/Arduino/MasterCode/MasterCode.ino
index 6591e74..b49078a 100644
--- a/comms/Arduino/MasterCode/MasterCode.ino
+++ b/comms/Arduino/MasterCode/MasterCode.ino
@@ -11,6 +11,7 @@ String incomingBytes2 = "";
 int readPls = 0;
 void setup() {
   Serial3.begin(115200);Serial2.begin(115200);Serial.begin(115200); // opens serial port, sets data rate to 9600 bps
+  delay(8000); //8 second delay to wait for RPi to run, avoids port busy error on RPi. 
 }
 
 void loop() {
diff --git a/comms/README.md b/comms/README.md
index 3ebb2aa..f9d3654 100644
--- a/comms/README.md
+++ b/comms/README.md
@@ -2,7 +2,7 @@
 
 Code for **wired** communication from Slave Arduinos to Master Arduino, and then Master Arduino to Raspberry Pi.<br/>
 
-###Code Description
+### Code Description
 
 - `RPi/` is working code for the Raspberry Pi
 	- `RPICOM.py` is the main python file that should be run on the Raspberry Pi.
@@ -16,7 +16,7 @@ Code for **wired** communication from Slave Arduinos to Master Arduino, and then
 - `Prev/` is previous code used for testing systems and debugging errors (not final code, and may be unstable)<br/>
 
 
-###Setup and Run
+### Setup and Run
 
 **Make sure you install python beforehand**
 
@@ -44,25 +44,25 @@ chmod 777 /dev/ttyACM*
 
 5. Open Arduino IDE and upload `blank/blank.ino` to all Arduinos.
 
-**Do not open serial monitor until steps 6-8 are done**
+**Do not open serial monitor on any Arduino**
 
 
 6. Upload `SlaveCode/SlaveCode.ino` or `SlaveFakeCode/SlaveFakeCode.ino` to the Slave Arduinos in Arduino IDE
 
-7. Upload `MasterCode/MasterCode.ino` to the Master Arduino in Arduino IDE
-
-8. `Cd` into `RPi/`
+7. `Cd` into `RPi/`
 
 ```
 cd RPi/
 ```
 
-9. Install pyserial
+8. Install pyserial
 
 ```
 pip3 install pyserial
 ```
 
+9. Upload `MasterCode/MasterCode.ino` to the Master Arduino in Arduino IDE
+
 10. Run the python code.
 
 ```