hi there
first you have to creat seril nturrept routeen for 9600 baud rate.
the get all command from user manule of r305. it is there. then creat string with that commands.
to add or scan first you have to
1. collect image,
2 store to buff-1
3 collect image again
4. store it to buff-2.
5. combine buff1 and buff-2 and generate tamplet
6. store that tamplet to your address.
i spent 12-13 days for it so i can understand your condition.
i have suscesfully made electronic votting machine with fingerprint module