ECG Compression - ECG Acquisition and Automated Remote Processing - page 115

10 digit
number

Data (7 bit) ASCIII
format

FD 04 0D 0A

Target
number
specifier

Target
mobile
number

Command to
send

Data packet End flag

Fig. 5.11 GSM module protocol

Target mobile
number

Sending button

File select

Fig. 5.12 Graphical user interface for transmitting compressed ECG

'command to send': to transmit the message frame.
'target mobile number': 10 digit mobile number of the cardiologist.
'target number specifier': mode of providing the mobile number, i.e., through
keyboard, or fixed and embedded within the code, etc.
'end flag': indicating termination of a single message.

Now, a single message can accommodate 160 characters, and an SMS frame
can accommodate maximum 80 characters of the original compressed array. A
graphical front end is developed to select and upload the compressed data seg-
regated in a number of short messages and deliver each as a frame to the GSM
modem through serial port. The GUI is shown in Fig. 5.12 .