import requests

def getHeartRate(playerID, channelID, apiKey):
    url = "https://api.thingspeak.com/channels/" + str(channelID) + "/fields/" + str(playerID) + "/last.json?api_key=" + str(apiKey)
    res = requests.get(url)
    js = res.json()
    if not js==-1:
        heartRate = js["field1"]
        timeStamp = js["created_at"]
        return dict(heartRate=heartRate, timeStamp=timeStamp)
    else:
        return -1