def main():
start_time = utime.ticks_ms()
# Turn LED for the duration of the program
led = Pin(LED_PIN, Pin.OUT, value=1)
# Show some information on the onboard OLED
reset = Pin(SSD1306_SCL_RST, Pin.OUT, value=1)
i2c_oled = I2C(
scl=Pin(SSD1306_SCL, Pin.IN, Pin.PULL_UP),
sda=Pin(SSD1306_SDA, Pin.IN, Pin.PULL_UP),
freq=SSD1306_FREQ
)
oled = ssd1306.SSD1306_I2C(64, 32, i2c_oled)
# BME280 temperature, pressure and humidity readings
data = b""
try:
i2c_bme = I2C(scl=Pin(BME280_SCL), sda=Pin(BME280_SDA), freq=BME280_FREQ)
bme = bme280.BME280(i2c=i2c_bme)
temperature, pressure, humidity = bme.read_compensated_data()
except (OSError, ValueError, NameError) as e:
print(e)
data += b"\x00\x00\x00"
oled.text(ubinascii.hexlify(data), 0, 16)
oled.text("ERROR!", 0, 24)
else:
print("Measurements:", temperature, "c", pressure, "Pa", humidity, "%")
# Manipulate sensor values so that they occupy 1 byte each
# Note how a +128 offset is used for the temperature (c) reading to
# maintain 1 byte signed
TEMP_OFFSET = const(128)
data += round(temperature + TEMP_OFFSET).to_bytes(1, "big")
data += round(pressure / 1000).to_bytes(1, "big")
data += round(humidity).to_bytes(1, "big")
# LoRaWAN / TTN send
lora = uLoRa(
cs=LORA_CS,
sck=LORA_SCK,
mosi=LORA_MOSI,
miso=LORA_MISO,
irq=LORA_IRQ,
rst=LORA_RST,
ttn_config=TTN_CONFIG,
datarate=LORA_DATARATE,
fport=LORA_FPORT
)
print("Sending packet...", lora.frame_counter, ubinascii.hexlify(data))
lora.send_data(data, len(data), lora.frame_counter)
print(len(data), "bytes sent!")
lora.frame_counter += 1
oled.text(ubinascii.hexlify(data), 0, 16)
oled.text("SENT!", 0, 24)
finally:
oled.show()
utime.sleep_ms(PROGRAM_WAIT_MS)
led.off()
deepsleep(PROGRAM_LOOP_MS - (utime.ticks_ms() - start_time))
#Enter the Data for the TTN access here
DEVADDR = bytearray([INSERT DATA HERE])
NWKEY = bytearray([INSERT DATA HERE])
APP = bytearray([INSERT DATA HERE])
#Configure your contry accodtingly for Europe you may use ="EU"
TTN_CONFIG = TTN(DEVADDR, NWKEY, APP, country="EU")
FPORT = 1
#Initialize the RFM95
lora = uLoRa(
cs=LORA_CS,
sck=LORA_SCK,
mosi=LORA_MOSI,
miso=LORA_MISO,
irq=LORA_IRQ,
rst=LORA_RST,
ttn_config=TTN_CONFIG,
datarate=LORA_DATARATE,
fport=FPORT
)
#OneWire setup
dat = machine.Pin(16)
# create the onewire object
ds = ds18x20.DS18X20(onewire.OneWire(dat))
#At this point the hardware is ready to go
# We will now scan for attached 1Wire devices