polarpy 0.1.1a1

Reads raw data streams from Polar OH1 and H10 sensors

polarpy

Tools for reading and fusing live data streams from Polar OH1 (PPG) and H10 (ECG) sensors.

Requirements

If installing from the repo you need PyGatttool (pip install pygatttool).

Installation

pip install polarpy

Usage

The following code starts the raw PPG and IMU streams on a Polar OH1, fuses the blocks pf data in the two streams at 135Hz, and provides a single output stream, each record having a timestamp, the PPG signal values for each of the 3 pairs of LEDs, and the corresponding accerelometer x, y and z readings.

The address and attribute handles for your particular device can be found using gatttool or another BLE tool such as nRF Connect.

from polarpy import Device, DeviceType

OH1_ADDR = "A0:9E:1A:7D:3C:5D"
OH1_CONTROL_ATTRIBUTE_HANDLE = 0x003f
OH1_DATA_ATTRIBUTE_HANDLE = 0x0042

def callback(type: str, timestamp: float, payload: dict):
    print(f'{timestamp} {payload}')

if '__main__' == __name__:
    device = Device(DeviceType.OH1,
                    address=OH1_ADDR,
                    control_handle=OH1_CONTROL_ATTRIBUTE_HANDLE,
                    data_handle=OH1_DATA_ATTRIBUTE_HANDLE,
                    callback=callback)

    if device.start():
        while device.run():
            pass

The output looks something like this:

3.94 {'ppg0': 263249, 'ppg1': 351764, 'ppg2': 351928, 'ax': 0.775, 'ay': -0.42, 'az': 0.476}
3.947 {'ppg0': 263297, 'ppg1': 351964, 'ppg2': 352077, 'ax': 0.775, 'ay': -0.42, 'az': 0.476}
3.954 {'ppg0': 263319, 'ppg1': 352062, 'ppg2': 352013, 'ax': 0.778, 'ay': -0.417, 'az': 0.481}
3.962 {'ppg0': 263293, 'ppg1': 352106, 'ppg2': 352082, 'ax': 0.778, 'ay': -0.417, 'az': 0.481}
3.969 {'ppg0': 263440, 'ppg1': 352273, 'ppg2': 352199, 'ax': 0.778, 'ay': -0.417, 'az': 0.481}

...