% La serpiente y el cerdito 🐍 🐷 % Clara Casas Castedo & Miguel Sánchez de León Peque % 2019-01-17
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| NodeMCU pin | Magnetic sensor pin |
|---|---|
| D1 (GPIO5) | SDA (P2.10) |
| D2 (GPIO4) | SCL (P2.11) |
| 3V3 | 3V3 (P1.0) |
| GND | GND |
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from machine import I2C
from machine import Pin
i2c = I2C(scl=Pin(5), sda=Pin(4), freq=400000)
devices = i2c.scan()
address = devices[0]
i2c.writeto(address, b'123') # Write 3 bytes
i2c.readfrom(address, 4) # Read 4 bytes
i2c.readfrom_mem(address, 8, 3) # Read 3 bytes at address 8
i2c.writeto_mem(address, 2, b'\x10') # Write 1 byte at address 2
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def read_registers(i2c):
read_address = 0x6b
trigger = 1 << 7
request = bytearray([read_address, trigger])
reply = bytearray(7)
i2c.start()
ack = i2c.write(request)
i2c.readinto(reply)
i2c.stop()
return reply, ackstation = WLAN(STA_IF)
station.active(True)
station.connect(config['ssid'], config['password'])reply = urequests.get(url)
reply = urequests.post(url, data=bytearray(ring))- tiempo total 1 segundo de datos
- 1000 lecturas por segundo
- sensor 3D con dimensiones x, y, z y tiempo
x_array = array.array('h', (0 for i in range(num_measures)))https://docs.micropython.org/array
def read_coin(self):
'''
Read magnetic sensor values and save on RAM (arrays)
'''
def save_readings(self):
'''
Save magnetic sensor values from RAM to a file
'''ring = array.array('h', (0 for i in range(4 * num_measures)))
def loop(self):
....
position = i * 4
ring[position] = time.ticks_us() % 65536
ring[position + 1] = x
ring[position + 2] = y
ring[position + 3] = z
.....
urequests.post(url, data=bytearray(ring))
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[data, time] = thingSpeakRead(516536, 'Fields', [1], 'NumDays', 7);
data = timetable(time, data)
data = retime(data, 'daily', 'sum')
bar(data.time, data.Variables, 'FaceColor', [1 .5 0])
- Código: github.com/CojoCompany/coink
- Documentación: coink.readthedocs.io
- Presentación: cojocompany.github.io/PythonVigo-2019-Coink/