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| 1 | +''' |
| 2 | +Copyright (c) 2020, Pycom Limited. |
| 3 | +This software is licensed under the GNU GPL version 3 or any |
| 4 | +later version, with permitted additional terms. For more information |
| 5 | +see the Pycom Licence v1.0 document supplied with this file, or |
| 6 | +available at https://www.pycom.io/opensource/licensing |
| 7 | +''' |
| 8 | + |
| 9 | +import math |
| 10 | +import json |
| 11 | + |
| 12 | +try: |
| 13 | + from pybytes_debug import print_debug |
| 14 | +except: |
| 15 | + from _pybytes_debug import print_debug |
| 16 | + |
| 17 | +try: |
| 18 | + import urequest |
| 19 | +except: |
| 20 | + import _urequest as urequest |
| 21 | + |
| 22 | +try: |
| 23 | + from pybytes_constants import constants |
| 24 | +except: |
| 25 | + from _pybytes_constants import constants |
| 26 | + |
| 27 | +import pycom |
| 28 | + |
| 29 | +try: |
| 30 | + from LIS2HH12 import * |
| 31 | +except: |
| 32 | + print_debug(5, "LIS2HH12 not imported") |
| 33 | + |
| 34 | +# 20 seconds, max window in time for recording |
| 35 | +MAX_LEN_MSEC = const(20000) |
| 36 | + |
| 37 | +# 350Hz, max frequency |
| 38 | +MAX_FREQ_HZ = const(350) |
| 39 | + |
| 40 | + |
| 41 | +class MlFeatures(): |
| 42 | + def __init__(self, pybytes_protocol=None, parameters=None): |
| 43 | + if parameters is not None: |
| 44 | + self.__length = parameters["length"] |
| 45 | + self.__label = parameters["label"] |
| 46 | + self.__sampleName = parameters["sampleName"] |
| 47 | + self.__type = parameters["type"] |
| 48 | + self.__device = parameters["device"] |
| 49 | + self.__model = parameters["model"] |
| 50 | + self.__mlSample = parameters["mlSample"] |
| 51 | + self.__frequency = parameters["frequency"] |
| 52 | + self.__pybytes_protocol = pybytes_protocol |
| 53 | + self.__data = [] |
| 54 | + |
| 55 | + def _debug_hack(self, pybytes): |
| 56 | + self.__pybytes = pybytes |
| 57 | + |
| 58 | + def start_sampling(self, pin): |
| 59 | + # here define the required libraries |
| 60 | + try: |
| 61 | + from pysense import Pysense |
| 62 | + except: |
| 63 | + print_debug(5, "pysense not imported") |
| 64 | + |
| 65 | + try: |
| 66 | + from pytrack import Pytrack |
| 67 | + except: |
| 68 | + print_debug(5, "pytrack not imported") |
| 69 | + |
| 70 | + lib = False |
| 71 | + try: |
| 72 | + py = Pysense() |
| 73 | + lib = True |
| 74 | + except NameError: |
| 75 | + print_debug(5, "Pysense not defined") |
| 76 | + |
| 77 | + if not lib: |
| 78 | + try: |
| 79 | + py = Pytrack() |
| 80 | + except NameError: |
| 81 | + print_debug(5, "Check if Pysense/Pytrack libraries are loaded") |
| 82 | + return |
| 83 | + |
| 84 | + try: |
| 85 | + li = LIS2HH12(py) |
| 86 | + except NameError: |
| 87 | + print_debug(5, "LIS2HH12 library are not loaded") |
| 88 | + return |
| 89 | + li.set_odr(ODR_400_HZ) |
| 90 | + |
| 91 | + # make the max record length to 20 seconds |
| 92 | + self.__length = min(MAX_LEN_MSEC, self.__length) |
| 93 | + |
| 94 | + # make the max frequency to 350Hz |
| 95 | + self.__frequency = min(MAX_FREQ_HZ, self.__frequency) |
| 96 | + |
| 97 | + # compute time interval between 2 consecutive samples |
| 98 | + delta_t_us = int(1000000.0 / self.__frequency) |
| 99 | + # compute the number of samples to be acquisition |
| 100 | + samples_num = math.ceil(self.__length * self.__frequency / 1000) + 1 |
| 101 | + |
| 102 | + pycom.heartbeat(False) |
| 103 | + pycom.rgbled(0x7f7f00) |
| 104 | + time.sleep(0.5) |
| 105 | + |
| 106 | + self.__data = [] |
| 107 | + index = 0 |
| 108 | + print("Start acquisition data for %d msec, freq %d Hz" % (self.__length, self.__frequency)) |
| 109 | + |
| 110 | + next_ts = time.ticks_us() |
| 111 | + ts_orig = next_ts |
| 112 | + while True: |
| 113 | + while time.ticks_diff(next_ts, time.ticks_us()) > 0: |
| 114 | + pass |
| 115 | + acc = li.acceleration() |
| 116 | + ts = next_ts |
| 117 | + self.__data.append((ts - ts_orig, acc)) |
| 118 | + next_ts = ts + delta_t_us |
| 119 | + index += 1 |
| 120 | + if index >= samples_num: |
| 121 | + break # done |
| 122 | + |
| 123 | + print("Done acquisition %d samples, real freq %.1f Hz" % (index, index / (self.__length / 1000))) |
| 124 | + self._parse_data(pin) |
| 125 | + |
| 126 | + def _send_data(self, data, pin, acc, ts): |
| 127 | + if self.__pybytes_protocol is not None: |
| 128 | + if self.__type == 2: |
| 129 | + self.__label = self.__sampleName |
| 130 | + self.__pybytes_protocol.send_pybytes_custom_method_values(pin, [ |
| 131 | + data], |
| 132 | + 'sample/{}/{}/{}/{}/{}'.format(self.__label, self.__type, self.__model, self.__device, self.__mlSample)) |
| 133 | + else: |
| 134 | + self.__pybytes.send_signal(pin & 0xFF, str((int(ts / 1000), acc))) |
| 135 | + |
| 136 | + def _parse_data(self, pin): |
| 137 | + print("_parse_data, %d samples" % len(self.__data)) |
| 138 | + pycom.rgbled(0x8d05f5) |
| 139 | + data = ['{"data": "ml"}'] |
| 140 | + for (ts, acc) in self.__data: |
| 141 | + data.append('{' + '"data": [{},{},{}], "ms": {}'.format(acc[0], acc[1], acc[2], int(ts / 1000)) + '}') |
| 142 | + if len(data) > 25: |
| 143 | + self._send_data(data, pin, acc, ts) |
| 144 | + data = ['{"data": "ml"}'] |
| 145 | + self._send_data(data, pin, acc, ts) |
| 146 | + pycom.heartbeat(True) |
| 147 | + |
| 148 | + def deploy_model(self, modelId, silent=False): |
| 149 | + try: |
| 150 | + file = '/flash/model_definition.json' |
| 151 | + modelDefinition = {} |
| 152 | + url = '{}://{}/ml/{}'.format( |
| 153 | + constants.__DEFAULT_PYCONFIG_PROTOCOL, |
| 154 | + constants.__DEFAULT_PYCONFIG_DOMAIN, |
| 155 | + modelId |
| 156 | + ) |
| 157 | + print_debug(2, '{}'.format(url)) |
| 158 | + result = urequest.get(url, headers={'content-type': 'application/json'}) |
| 159 | + modelDefinition = json.loads(result.content.decode()) |
| 160 | + print_debug(2, 'modelDefinition: {}'.format(modelDefinition)) |
| 161 | + f = open(file, 'w') |
| 162 | + f.write(json.dumps(modelDefinition).encode('utf-8')) |
| 163 | + f.close() |
| 164 | + print_debug(2, "Model definition written to {}".format(file)) |
| 165 | + except Exception as e: |
| 166 | + if not silent: |
| 167 | + print_debug(2, "Exception: {}".format(e)) |
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