Agrotech Sensor Kit API

An API to facilitate interaction with an agriculture tech sensor kit. The sensor kit contains the following hardware modules in addition to the Raspberry Pi Zero W:

• Quectel L70-M39 GPS
• Adafruit MCP3008 ADC
• Seeed Studio 10102008 Moisture Sensor
• Adafruit TCS34725 Light Sensor

Licensing

• Free software: GNU General Public License v3

Features

• Sensor reading
  • GPS
  • Moisture
  • Lux
• Creating sensor profiles
• Logging data to text files
• Sending configuration commands GPS

Setup

• Ensure SPI, I2C and UART are enabled on the Raspberry Pi. This can be done using the sudo raspi-config command in the Linux terminal.
• Install required packages. These can be done as follows:
  • pip3 install Adafruit_GPIO Adafruit_MCP3008 Adafruit-Blinka
  • pip3 install file-read-backwards requests pynmea2
  • pip3 install RPi.GPIO adafruit-circuitpython-tcs34725
  • pip3 install agro-kit

Note that this API can has to be used on a Raspberry Pi.

Hardware Configuration

Pin numbers according to datasheets are shown in []

• Adafruit TCS34735 -> Raspberry Pi
  • VDD [1] -> GPIO-17 [11]
  • GND [2] -> GND
  • SDA [3] -> SDA1_I2C [3]
  • SCL [4] -> SCL1_I2C [5]
• Seeed Studio -> Raspberry Pi
  • [3] -> GPIO23 [16]
  • [4] -> GND
• MCP3008 -> Seed Studio
  • CHO 0 [1] -> [1]
• MCP3008 -> Raspberry Pi
  • GND [9] -> GND
  • CS [10] -> GPIO_SPI_CE0 [24]
  • D-IN [11] -> GPIO_SPI_MOSI [19]
  • D-OUT [12] -> GPIO_SPI_MISO [21]
  • CLK [13] -> GPIO_SPI_CLK [23]
  • GND [14] -> GND
  • VREF [15] -> 3.3 V [17]
  • VDD [16] -> 3.3 V [17]
• QUECTEL L70-M39
  • TXD [2] -> GPIO_15_UART_RXD [10]
  • RXD [3] -> GPIO_14_UART_TXD [8]
  • VCC [8] -> 3.3 V [1]
  • GND [1] -> GND

About

• The library includes 4 main classes: MoistureSensor, light_sensor, GPS and AgroKit.
• The AgroKit is an aggregated class built with attributes of the other sensor classes
• The AgroKit class can use any instance method available in the other sensor classes as well as its own aggregated methods

Link to documentation

Credits

This package was created with Cookiecutter and the audreyr/cookiecutter-pypackage project template.

The pynmea2 python library was used for GPS parsing of NMEA 0183 messages.