sensor-sdk

Synchroni sdk for Python

Brief

Synchroni SDK is the software development kit for developers to access Synchroni products.

Contributing

See the contributing guide to learn how to contribute to the repository and the development workflow.

License

MIT

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Installation

pip install sensor-sdk 

1. Permission

Application will obtain bluetooth permission by itself.

2. Import SDK

from sensor import *

SensorController methods

1. Initalize

SensorControllerInstance = SensorController()

# register scan listener
if not SensorControllerInstance.hasDeviceFoundCallback:
    def on_device_callback(deviceList: List[BLEDevice]):
        # return all devices doesn't connected
        pass
    SensorControllerInstance.onDeviceFoundCallback = on_device_callback

2. Start scan

Use def startScan(period_in_ms: int) -> bool to start scan

success = SensorControllerInstance.startScan(6000)

returns true if start scan success, periodInMS means onDeviceCallback will be called every periodInMS

3. Stop scan

Use def stopScan() -> None to stop scan

SensorControllerInstance.stopScan()

4. Check scaning

Use property isScanning: bool to check scanning status

isScanning = SensorControllerInstance.isScanning

5. Check if bluetooth is enabled

Use property isEnabled: bool to check if bluetooth is enabled

isEnabled = SensorControllerInstance.isEnabled

6. Create SensorProfile

Use def requireSensor(device: BLEDevice) -> SensorProfile | None to create SensorProfile.

If bleDevice is invalid, result is None.

sensorProfile = SensorControllerInstance.requireSensor(bleDevice)

7. Get SensorProfile

Use def getSensor(device: BLEDevice) -> SensorProfile | None to get SensorProfile.

If SensorProfile didn't created, result is None.

sensorProfile = SensorControllerInstance.getSensor(bleDevice)

8. Get Connected SensorProfiles

Use def getConnectedSensors() -> list[SensorProfile] to get connected SensorProfiles.

sensorProfiles = SensorControllerInstance.getConnectedSensors()

9. Get Connected BLE Devices

Use def getConnectedDevices() -> list[SensorProfile] to get connected BLE Devices.

bleDevices = SensorControllerInstance.getConnectedDevices()

10. Terminate

Use def terminate() to terminate sdk

def terminate():
    SensorControllerInstance.terminate()
    exit()
    
def main():
    signal.signal(signal.SIGINT, lambda signal, frame: terminate())
    time.sleep(30)
    SensorControllerInstance.terminate()
    
Please MAKE SURE to call terminate when exit main() or press Ctrl+C

SensorProfile methods

11. Initalize

Please register callbacks for SensorProfile

sensorProfile = SensorControllerInstance.requireSensor(bleDevice)

# register callbacks
def on_state_changed(sensor, newState):
    # please do logic when device disconnected unexpected
    pass

def on_error_callback(sensor, reason):
    # called when error occurs
    pass

def on_power_changed(sensor, power):
    # callback for get battery level of device, power from 0 - 100, -1 is invalid
    pass

def on_data_callback(sensor, data):
    # called after start data transfer
    pass

sensorProfile.onStateChanged = on_state_changed
sensorProfile.onErrorCallback = on_error_callback
sensorProfile.onPowerChanged = on_power_changed
sensorProfile.onDataCallback = on_data_callback

12. Connect device

Use def connect() -> bool to connect.

success = sensorProfile.connect()

13. Disconnect

Use def disconnect() -> bool to disconnect.

success = sensorProfile.disconnect()

14. Get device status

Use property deviceState: DeviceStateEx to get device status.

Please send command in 'Ready' state, should be after connect() return True.

deviceStateEx = sensorProfile.deviceState

# deviceStateEx has define:
# class DeviceStateEx(Enum):
#     Disconnected = 0
#     Connecting = 1
#     Connected = 2
#     Ready = 3
#     Disconnecting = 4
#     Invalid = 5

15. Get BLE device of SensorProfile

Use property BLEDevice: BLEDevice to get BLE device of SensorProfile.

bleDevice = sensorProfile.BLEDevice

16. Get device info of SensorProfile

Use def getDeviceInfo() -> dict | None to get device info of SensorProfile.

Please call after device in 'Ready' state, return None if it's not connected.

    deviceInfo = sensorProfile.getDeviceInfo()

# deviceInfo has defines:
# deviceInfo = {
#     "deviceName": str,
#     "modelName": str,
#     "hardwareVersion": str,
#     "firmwareVersion": str,
#     "emgChannelCount": int,
#     "eegChannelCount": int,
#     "ecgChannelCount": int,
#     "accChannelCount": int,
#     "gyroChannelCount": int,
#     "brthChannelCount": int,
#     "mtuSize": int
# }

17. Init data transfer

Use def init(packageSampleCount: int, powerRefreshInterval: int) -> bool.

Please call after device in 'Ready' state, return True if init succeed.

success = sensorProfile.init(5, 60*1000)

packageSampleCount: set sample counts of SensorData.channelSamples in onDataCallback() powerRefreshInterval: callback period for onPowerChanged()

18. Check if init data transfer succeed

Use property hasInited: bool to check if init data transfer succeed.

hasInited = sensorProfile.hasInited

19. DataNotify

Use def startDataNotification() -> bool to start data notification.

Please call if hasInited return True

19.1 Start data transfer

success = sensorProfile.startDataNotification()

Data type list：

class DataType(Enum):
    NTF_ACC = 0x1  # unit is g
    NTF_GYRO = 0x2  # unit is degree/s
    NTF_EEG = 0x10  # unit is uV
    NTF_ECG = 0x11  # unit is uV
    NTF_BRTH = 0x15  # unit is uV

Process data in onDataCallback.

def on_data_callback(sensor, data):
    if data.dataType == DataType.NTF_EEG:
        pass
    elif data.dataType == DataType.NTF_ECG:
        pass

    # process data as you wish
    for oneChannelSamples in data.channelSamples:
        for sample in oneChannelSamples:
            if sample.isLost:
                # do some logic
                pass
            else:
                # draw with sample.data & sample.channelIndex
                # print(f"{sample.channelIndex} | {sample.sampleIndex} | {sample.data} | {sample.impedance}")
                pass

sensorProfile.onDataCallback = on_data_callback

19.2 Stop data transfer

Use def stopDataNotification() -> bool to stop data transfer.

success = sensorProfile.stopDataNotification()

19.3 Check if it's data transfering

Use property isDataTransfering: bool to check if it's data transfering.

isDataTransfering = sensorProfile.isDataTransfering

20. Get battery level

Use def getBatteryLevel() -> int to get battery level. Please call after device in 'Ready' state.

batteryPower = sensorProfile.getBatteryLevel()

# batteryPower is battery level returned, value ranges from 0 to 100, 0 means out of battery, while 100 means full.

Please check console.py in examples directory