1. Start-> Accessories-> Communication-> Hyperterminal
2. Open new connection
3. “Connect using:” the correct COM port, you will see a
windows->change Bits per second to “9600”
4. Type “ATE1” and press Enter (it’ll show “ok”)
5. Type “AT+IPR=115200” and press Enter (it’ll show “ok”)
6. Click on “disconnect” icon
7. Go to Properties and change the Bits per second to “115200”
8. Type “AT&W” and press Enter (it’ll show “ok”)
Then it’ll be changed to 115200.