Extend timeout waiting for device to appear

Tweak retry message for clarity

start_flash.sh

@@ -73,15 +73,15 @@ echo "Starting smart config pairing procedure"
 
 echo "Waiting for the device to install the intermediate firmware"
 
-i=60
+i=120
 while ! ping -c 1 -W 1 -n 10.42.42.42 &> /dev/null; do
 	printf .
 	if (( --i == 0 )); then
 		echo
 		echo "Device did not appear with the intermediate firmware"
 		echo "Check the *.log files in the scripts folder"
 		pkill -f smartconfig/main.py && echo "Stopping smart config"
-		read -p "Do you want to flash another device? [y/N] " -n 1 -r
+		read -p "Do you want to try flashing another device? [y/N] " -n 1 -r
 		echo
 		continue 2
 	fi