fork of a TelenorStartIoT project, adapted to work on TheThingsNetwork
Before you can connect to LoRaWAN you need to create a ThingType and a Thing in Managed IoT Cloud (MIC) and obtain OTAA keys. Once you've got the keys, add them to the config.py file. The lib/lora.py library will make use of them.
On startup of the LoPy the dev_eui is printed on the console and can be used to register the device on TheThingsNetwork.
- LoPy
- Pycom expansion board
- BME280 Sensor
- Davis 6410 anemometer
The BME280 sensor will measure temperature, humidity and pressure while the Davis anemometer will measure wind speed and wind direction.
For the BME280 the I2C bus is used. Connections are:
BM280 (Adafruit version) -> Pycom expansion board pin (LoPy pin labels)
- VIN to 3V3
- GND to GND
- SCK to G17 (SCL, GPIO12)
- SDI to G16 (SDA, GPIO13)
Davis anemometer -> Pycom expansion board pin (LoPy pin labels)
- PWR (red wire) to 3V3
- GND (black wire) to GND
- SPD (yellow wire) to G22 (P11, GPIO22)
- DIR (green wire) to G0 (P15, ADC1_2)
The guide uses P11 (written G22 on the expansion board) and G3 for wind speed and wind direction respectively.
You can change these to your own by modifying PIN_SPEED and PIN_DIR in lib/davis7911.py:10.
According to documentation the ADC can be setup for 3.3V on the input: https://docs.pycom.io/chapter/firmwareapi/pycom/machine/ADC.html. This allows to connect the Davis Sensor without a Voltage divider and gives a linear value over the 360°, so you don't have to add the resistors as shown in the original TelenorStartIoT document.