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Garden Shed Sensor Communications

I crafted this project as a christmas gift for my wife to monitor conditions in a garden shed that she uses to start seeds. The project is implemented using an ESP8266 and a Raspberry Pi 3 along with a DHT22/AM2302 attached to one of the GPIOs on the ESP8266.

ESP8266 - Lua

The ESP8266 resides in a remote location (the garden shed) and must have access to WiFi. I am utilizing DD-WRT'd routers to range extend my network the necessary distance. The ESP8266 w/ NodeMCU implementation currently loads three files, an init routine, TCP Socket Server, and a Buffer Generator for returning the DHT22/AM2302 data in either HTML or JSON format. The operation of these files is further explained in the ESP8266 README. Due to the short time I had to get a working protoype in place I used the clould based NodeMCU firmware builder rather than building from the Expressif SDK (Future Enhancement).

Short list of the NodeMCU Firmware Modules:

  • tmr - For managing the init script.
  • file - To store the files on the internal storage.
  • dht - Library to read the DHT/AM2302 Sensor.
  • gpio - Needed to communicate the DHT/AM2302 sensor attached to the GPIO.
  • net - Used to set up the TCP server.
  • node - Not used yet.
  • wifi - Used to initizlize the WiFi and/or setup static configuration.
  • ssl - Not implmented yet.
  • http - Not implemented yet.

Raspbery Pi - Node.js (Express), JavaScript, MySQL

TODO:

  • Write Intro
  • Write ESP8266 Intro
  • Write RaspberryPi Intro
  • Write ESP8266 README
  • Write nodeServer README