HM8012: Remote Control (ID #603)
To display all characters you need a terminal program, which is able to display ASCII-, Hex-, Decimal- and Binary characters. In the following case the correct string I? was sent. In the picture down below you may find the device specific control characters, which will be send after 17 resp. 19 (XON/XOFF). After sending a command the device is ready to receive a new command automatically.
Please find attached a screenshot of a terminal program controlling the HM8012 (the terminal program is HTerm, which may be obtained in the internet for free).