VSH101 1-Lead ECG Holter Communication Packet Command
VSH101 BLE Communication Flow
Initial communication flow after connection VSH101:
When VSC MODE has not been performed, instructions must be communicated every 10 seconds to stay connected.
The VSC MODE START and VSC MODE STOP command are simple. Like the other BLE commands introduced before. The VSC MODE READ command will be a little more complicated. When user issues the VSC_MODE_READ commad, device will send back 968 bytes data. The next section will give you a more detail description about the VSC Mode Data Format. Each VSC MODE READ command carries 200 ms ECG data and related information. It means user has to issues at lease 5 times VSC MODE READ command every second or the data will be overflow.
VSH101 BLE Profile :
Service profile: 6e400001-b5a3-f393-e0a9-e50e24dcca9e
Cmd Data format “index” set loops back from 0 to 999 after VSC Mode starts executing.
When Packet “index” loops back from 0 to 999 after VSC Mode starts executing, if 8000 is received, the data is not ready or 8000 is received for more than 1 second in a row, the VSC MODE Queue is overflowed
VSC MODE TYPE 0 Data Format
As mentioned, There are 968 bytes of returning data of VSC MODE READ. It includes two parts:
ECG DATA (800 bytes) – 2 channel ECG datas
INFO DATA (168 bytes) – 42 information
The detail description is listed below:
The INFO Data included 26 information for user to do the monitoring. It is listed below:
It includes Time (1), temperature(2), ECG data(2, 3), G-Sensor (5, 6, 7), Battery Status (8, 9), HRV (10, 11, 12, 13, 14, 15, 16), Barometer values(17, 18), and 5 G-Sensor points during the period (GS_X0..5, GS_Y0..5, GS_Z0..5).
Since the G-Sensor inside will keep monitor patient’s activity in a sampling rate of 25 Hz. A VSC Mode Data includes 200 ms information and it means the VSC Mode Data will have 5 points of G-Sensor data and they are GS_X0..5, GS_Y0..5, GS_Z0..5.
VSC MODE TYPE 1 Data Format
As mentioned, There are 568 bytees of returning data of VSC MODE READ. It includes two parts:
ECG DATA (400 bytes) – 1 channel ECG datas
INFO DATA (168 bytes) – 42 information
The detail description is listed below:
The INFO Data included 26 information for user to do the monitoring. It is listed below:
It includes Time (1), temperature(2), ECG data(2, 3), G-Sensor (5, 6, 7), Battery Status (8, 9), HRV (10, 11, 12, 13, 14, 15, 16), Barometer values(17, 18), and 5 G-Sensor points during the period (GS_X0..5, GS_Y0..5, GS_Z0..5).
Since the G-Sensor inside will keep monitor patient’s activity in a sampling rate of 25 Hz. A VSC Mode Data includes 200 ms information and it means the VSC Mode Data will have 5 points of G-Sensor data and they are GS_X0..5, GS_Y0..5, GS_Z0..5.