made changeport work

.gitignore

@@ -1 +1,2 @@
 test-scratch.sh
+notes.txt

custom_bin/changeport

@@ -1,3 +1,4 @@
+subprocess() {
     echo "\nChanging ESPPORT\n"
     echo "TTY devices found in dmesg:"
     COUNTER=0
@@ -10,7 +11,17 @@ done
 
     echo "\nEnter TTY Number You'd Like:"
     read tty
-ttyselect=$devarr[(($tty+1))]
-export ESPPORT="${ttyselect}"
+
+    sel=$tty+1
+    eval "$1=$devarr[$sel]"
+
+    return 0
+} 
+
+ret=''
+subprocess ret
+
+export ESPPORT=$ret
+
 echo "\nESPPORT set to ${ESPPORT}\n"
 echo "\nall done :3\n"