Merge pull request adafruit#1031 from jedgarpark/clue-heart-rate

Clue heart rate

Author: ladyada

CLUE_Heart_Rate_Trainer/clue_heart_rate_trainer.py

@@ -0,0 +1,137 @@
+"""
+Heart Rate Trainer
+Read heart rate data from a heart rate peripheral using the standard BLE
+Heart Rate service.
+Displays BPM value and percentage of max heart rate on CLUE
+"""
+
+import time
+from adafruit_clue import clue
+import adafruit_ble
+from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
+from adafruit_ble.services.standard.device_info import DeviceInfoService
+from adafruit_ble_heart_rate import HeartRateService
+
+clue_data = clue.simple_text_display(title="Heart Rate", title_color = clue.PINK,
+                                     title_scale=1, text_scale=3)
+
+alarm_enable = True
+
+# target heart rate for interval training
+# Change this number depending on your max heart rate, usually figured
+# as (220 - your age).
+max_rate = 180
+
+# PyLint can't find BLERadio for some reason so special case it here.
+ble = adafruit_ble.BLERadio()    # pylint: disable=no-member
+
+hr_connection = None
+
+# Start with a fresh connection.
+if ble.connected:
+    print("SCAN")
+    print("BLE")
+    time.sleep(1)
+
+    for connection in ble.connections:
+        if HeartRateService in connection:
+            connection.disconnect()
+        break
+
+while True:
+    print("Scanning...")
+    print("SCAN")
+    print("BLE")
+    time.sleep(1)
+    clue_data[0].text = "BPM: ---"
+    clue_data[0].color = ((30, 0, 0))
+    clue_data[1].text = "Scanning..."
+    clue_data[3].text = ""
+    clue_data[1].color = ((130, 130, 0))
+    clue_data.show()
+
+    for adv in ble.start_scan(ProvideServicesAdvertisement, timeout=5):
+        if HeartRateService in adv.services:
+            print("found a HeartRateService advertisement")
+            hr_connection = ble.connect(adv)
+            #display_dots()
+            print("....")
+            time.sleep(2)
+            print("Connected")
+            break
+
+    # Stop scanning whether or not we are connected.
+    ble.stop_scan()
+    print("Stopped scan")
+    time.sleep(0.1)
+
+    if hr_connection and hr_connection.connected:
+        print("Fetch connection")
+        if DeviceInfoService in hr_connection:
+            dis = hr_connection[DeviceInfoService]
+            try:
+                manufacturer = dis.manufacturer
+            except AttributeError:
+                manufacturer = "(Manufacturer Not specified)"
+            try:
+                model_number = dis.model_number
+            except AttributeError:
+                model_number = "(Model number not specified)"
+            print("Device:", manufacturer, model_number)
+        else:
+            print("No device information")
+        hr_service = hr_connection[HeartRateService]
+        print("Location:", hr_service.location)
+
+        while hr_connection.connected:
+            values = hr_service.measurement_values
+            #print(values)  # returns the full heart_rate data set
+            if values:
+                bpm = (values.heart_rate)
+                if bpm is not 0:
+                    pct_target = (round(100*(bpm/max_rate)))
+                if values.heart_rate is 0:
+                    print("----")
+                    clue_data[0].text = "BPM: ---"
+                    clue_data[0].color = ((80, 0, 0))
+                    clue_data[1].text = "Target: --"
+                    clue_data[1].color = ((0, 0, 80))
+                else:
+                    clue_data[0].text = "BPM: {0:d}".format(bpm)
+                    clue_data[0].color = clue.RED
+
+                    clue_data[1].text = "Target: {0:d}%".format(pct_target)
+                    if pct_target < 90:
+                        alarm = False
+                        clue_data[1].color = clue.CYAN
+                    else:
+                        alarm = True
+                        clue_data[1].color = clue.RED
+
+                    clue_data[3].text = "Max HR: : {0:d}".format(max_rate)
+                    clue_data[3].color = clue.BLUE
+                    clue_data.show()
+
+                    if alarm and alarm_enable:
+                        clue.start_tone(2000)
+                    else:
+                        clue.stop_tone()
+
+                    # Inputs
+                    if clue.button_a:
+                        if clue.touch_2:  # hold cap touch 2 for bigger change rate
+                            max_rate = max_rate -10
+                        else:
+                            max_rate = max_rate - 1
+                    if clue.button_b:
+                        if clue.touch_2:
+                            max_rate = max_rate + 10
+                        else:
+                            max_rate = max_rate + 1
+
+                    if clue.touch_0:
+                        alarm_enable = False
+                    if clue.touch_1:
+                        alarm_enable = True
+
+            time.sleep(0.2)