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ladyadaladyada
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Merge pull request #10 from ladyada/master
Many updates, new functions, flow control, simplified examples
2 parents 0ed72ce + 47222c6 commit 6776e9d

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‎adafruit_espatcontrol.py

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‎examples/espatcontrol_bitcoinprice.py

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‎examples/espatcontrol_cheerlights.py

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"""
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This example will query ThingSpeak channel 1417 "CheerLights" and display the
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color on a NeoPixel ring or strip
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"""
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import gc
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import time
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import board
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import busio
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from digitalio import DigitalInOut
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import adafruit_espatcontrol
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import neopixel
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import ujson
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import adafruit_fancyled.adafruit_fancyled as fancy
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# Get wifi details and more from a settings.py file
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try:
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from settings import settings
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except ImportError:
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print("WiFi settings are kept in settings.py, please add them there!")
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raise
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# CONFIGURATION
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TIME_BETWEEN_QUERY = 10 # in seconds
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# Cheerlights!
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DATA_SOURCE = "http://api.thingspeak.com/channels/1417/feeds.json?results=1"
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DATA_LOCATION = ["feeds", 0, "field2"]
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uart = busio.UART(board.TX, board.RX, timeout=0.1)
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resetpin = DigitalInOut(board.D5)
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rtspin = DigitalInOut(board.D9)
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# Create the connection to the co-processor and reset
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esp = adafruit_espatcontrol.ESP_ATcontrol(uart, 115200, run_baudrate=460800,
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reset_pin=resetpin,
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rts_pin=rtspin, debug=True)
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esp.hard_reset()
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# neopixels
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pixels = neopixel.NeoPixel(board.A1, 16, brightness=0.3)
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pixels.fill(0)
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builtin = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=0.1)
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builtin[0] = 0
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# we'll save the value in question
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last_value = value = None
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the_time = None
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times = 0
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def get_value(response, location):
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"""Extract a value from a json object, based on the path in 'location'"""
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try:
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print("Parsing JSON response...", end='')
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json = ujson.loads(response)
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print("parsed OK!")
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for x in location:
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json = json[x]
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return json
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except ValueError:
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print("Failed to parse json, retrying")
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return None
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while True:
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try:
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while not esp.is_connected:
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builtin[0] = (100, 0, 0)
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# settings dictionary must contain 'ssid' and 'password' at a minimum
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esp.connect(settings)
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builtin[0] = (0, 100, 0)
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# great, lets get the data
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print("Retrieving data source...", end='')
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builtin[0] = (100, 100, 0)
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header, body = esp.request_url(DATA_SOURCE)
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builtin[0] = (0, 0, 100)
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print("Reply is OK!")
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except (RuntimeError, adafruit_espatcontrol.OKError) as e:
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print("Failed to get data, retrying\n", e)
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continue
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print('-'*40, "Size: ", len(body))
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print(str(body, 'utf-8'))
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print('-'*40)
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# For mystery reasons, there's two numbers before and after the json data
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lines = body.split(b'\r\n') # so split into lines
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value = get_value(lines[1], DATA_LOCATION) # an get the middle chunk
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builtin[0] = (100, 100, 100)
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if not value:
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continue
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print(times, the_time, "value:", value)
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if last_value != value:
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color = int(value[1:],16)
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red = color >> 16 & 0xFF
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green = color >> 8 & 0xFF
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blue = color& 0xFF
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gamma_corrected = fancy.gamma_adjust(fancy.CRGB(red, green, blue)).pack()
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pixels.fill(gamma_corrected)
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last_value = value
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times += 1
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# normally we wouldn't have to do this, but we get bad fragments
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header = body = None
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gc.collect()
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print(gc.mem_free()) # pylint: disable=no-member
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time.sleep(TIME_BETWEEN_QUERY)

‎examples/espatcontrol_countviewer.py

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"""
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This example will access an API, grab a number like hackaday skulls, github
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stars, price of bitcoin, twitter followers... if you can find something that
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spits out JSON data, we can display it!
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"""
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import gc
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import time
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import board
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import busio
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from digitalio import DigitalInOut
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import adafruit_espatcontrol
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from adafruit_ht16k33 import segments
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import neopixel
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import ujson
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# Get wifi details and more from a settings.py file
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try:
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from settings import settings
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except ImportError:
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print("WiFi settings are kept in settings.py, please add them there!")
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raise
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# CONFIGURATION
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PLAY_SOUND_ON_CHANGE = False
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NEOPIXELS_ON_CHANGE = False
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TIME_BETWEEN_QUERY = 60 # in seconds
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# Some data sources and JSON locations to try out
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# Bitcoin value in USD
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DATA_SOURCE = "http://api.coindesk.com/v1/bpi/currentprice.json"
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DATA_LOCATION = ["bpi", "USD", "rate_float"]
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# Github stars! You can query 1ce a minute without an API key token
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#DATA_SOURCE = "https://api.github.com/repos/adafruit/circuitpython"
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#if 'github_token' in settings:
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# DATA_SOURCE += "?access_token="+settings['github_token']
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#DATA_LOCATION = ["stargazers_count"]
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# Youtube stats
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#CHANNEL_ID = "UCpOlOeQjj7EsVnDh3zuCgsA" # this isn't a secret but you have to look it up
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#DATA_SOURCE = "https://www.googleapis.com/youtube/v3/channels/?part=statistics&id=" \
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# + CHANNEL_ID +"&key="+settings['youtube_token']
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# try also 'viewCount' or 'videoCount
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#DATA_LOCATION = ["items", 0, "statistics", "subscriberCount"]
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# Subreddit subscribers
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#DATA_SOURCE = "https://www.reddit.com/r/circuitpython/about.json"
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#DATA_LOCATION = ["data", "subscribers"]
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# Hackaday Skulls (likes), requires an API key
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#DATA_SOURCE = "https://api.hackaday.io/v1/projects/1340?api_key="+settings['hackaday_token']
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#DATA_LOCATION = ["skulls"]
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# Twitter followers
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#DATA_SOURCE = "https://cdn.syndication.twimg.com/widgets/followbutton/info.json?" + \
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#"screen_names=adafruit"
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#DATA_LOCATION = [0, "followers_count"]
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uart = busio.UART(board.TX, board.RX, timeout=0.1)
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resetpin = DigitalInOut(board.D5)
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rtspin = DigitalInOut(board.D9)
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# Create the connection to the co-processor and reset
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esp = adafruit_espatcontrol.ESP_ATcontrol(uart, 115200, run_baudrate=921600,
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reset_pin=resetpin,
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rts_pin=rtspin, debug=True)
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esp.hard_reset()
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# Create the I2C interface.
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i2c = busio.I2C(board.SCL, board.SDA)
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# Attach a 7 segment display and display -'s so we know its not live yet
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display = segments.Seg7x4(i2c)
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display.print('----')
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# neopixels
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if NEOPIXELS_ON_CHANGE:
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pixels = neopixel.NeoPixel(board.A1, 16, brightness=0.4, pixel_order=(1, 0, 2, 3))
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pixels.fill(0)
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# music!
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if PLAY_SOUND_ON_CHANGE:
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import audioio
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wave_file = open("coin.wav", "rb")
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wave = audioio.WaveFile(wave_file)
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# we'll save the value in question
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last_value = value = None
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the_time = None
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times = 0
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def chime_light():
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"""Light up LEDs and play a tune"""
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if NEOPIXELS_ON_CHANGE:
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for i in range(0, 100, 10):
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pixels.fill((i, i, i))
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if PLAY_SOUND_ON_CHANGE:
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with audioio.AudioOut(board.A0) as audio:
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audio.play(wave)
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while audio.playing:
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pass
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if NEOPIXELS_ON_CHANGE:
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for i in range(100, 0, -10):
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pixels.fill((i, i, i))
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pixels.fill(0)
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def get_value(response, location):
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"""Extract a value from a json object, based on the path in 'location'"""
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try:
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print("Parsing JSON response...", end='')
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json = ujson.loads(response)
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print("parsed OK!")
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for x in location:
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json = json[x]
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return json
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except ValueError:
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print("Failed to parse json, retrying")
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return None
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while True:
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try:
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while not esp.is_connected:
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# settings dictionary must contain 'ssid' and 'password' at a minimum
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esp.connect(settings)
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# great, lets get the data
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# get the time
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the_time = esp.sntp_time
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print("Retrieving data source...", end='')
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header, body = esp.request_url(DATA_SOURCE)
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print("Reply is OK!")
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except (RuntimeError, adafruit_espatcontrol.OKError) as e:
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print("Failed to get data, retrying\n", e)
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continue
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#print('-'*40, "Size: ", len(body))
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#print(str(body, 'utf-8'))
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#print('-'*40)
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value = get_value(body, DATA_LOCATION)
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if not value:
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continue
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print(times, the_time, "value:", value)
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display.print(int(value))
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if last_value != value:
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chime_light() # animate the neopixels
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last_value = value
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times += 1
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# normally we wouldn't have to do this, but we get bad fragments
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header = body = None
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gc.collect()
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print(gc.mem_free()) # pylint: disable=no-member
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time.sleep(TIME_BETWEEN_QUERY)

‎examples/espatcontrol_settings.py

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# This file is where you keep secret settings, passwords, and tokens!
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# If you put them in the code you risk committing that info or sharing it
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settings = {
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'ssid' : 'my access point',
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'password' : 'my password',
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'timezone' : -5, # this is offset from UTC
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'github_token' : 'abcdefghij0123456789',
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}

‎examples/espatcontrol_simpletest.py

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import time
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import board
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import busio
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from digitalio import DigitalInOut
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import adafruit_espatcontrol
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MY_SSID = "my ssid"
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MY_PASSWORD = "the password"
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# Get wifi details and more from a settings.py file
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try:
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from settings import settings
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except ImportError:
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print("WiFi settings are kept in settings.py, please add them there!")
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raise
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9-
uart = busio.UART(board.TX, board.RX, baudrate=115200, timeout=1)
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uart = busio.UART(board.TX, board.RX, timeout=0.1)
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resetpin = DigitalInOut(board.D5)
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print("ESP AT commands")
13-
esp = adafruit_espatcontrol.ESP_ATcontrol(uart, 115200, reset_pin=resetpin, debug=False)
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esp = adafruit_espatcontrol.ESP_ATcontrol(uart, 115200, run_baudrate=9600,
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reset_pin=resetpin, debug=False)
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print("Resetting ESP module")
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esp.hard_reset()
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if not esp.soft_reset():
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esp.hard_reset()
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esp.soft_reset()
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esp.echo(False)
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print("Connected to AT software version ", esp.get_version())
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if esp.mode != esp.MODE_STATION:
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esp.mode = esp.MODE_STATION
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print("Mode is now", esp.mode)
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for ap in esp.scan_APs():
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print(ap)
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esp.join_AP(MY_SSID, MY_PASSWORD)
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print("My IP Address:", esp.local_ip)
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while True:
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try:
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print("Checking connection...")
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while not esp.is_connected:
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print("Initializing ESP module")
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#print("Scanning for AP's")
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#for ap in esp.scan_APs():
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# print(ap)
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# settings dictionary must contain 'ssid' and 'password' at a minimum
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print("Connecting...")
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esp.connect(settings)
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print("Connected to AT software version ", esp.version)
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print("Pinging 8.8.8.8...", end="")
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print(esp.ping("8.8.8.8"))
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time.sleep(10)
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except (RuntimeError, adafruit_espatcontrol.OKError) as e:
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print("Failed to get data, retrying\n", e)
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continue

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