How to use it? Add a task to your Google Calendar and the irrigation of your garden/lawn will start when the event begins and stop when it ends!
Why I invented that? I don't like the interface of cheap irrigation programmers, the irrigation parameters are not flexible enough and it can't be controlled remotely. I wanted a cheap wifi irrigation programmer but I didn't want to build the entire UI for the ESP8266, I preferred to be able to change the irrigation planning from anywhere with simple means. I decided to have the ESP polling one of my Google Calendars, with events to turn on and off the valve at the correct timing.
How is this made possible? A ESP8266 connects to your Google Calendar via your home Wifi (using a Google Script) and commands a solenoid valve.
Parts list:
- 3 x Capacitors (22µF, 0.1µF, 4700µF)
- 1 x DC motor driver (DRV8872 in this case)
- 1 x ESP8266 (version ESP07)
- 1 x 3.3V Voltage regulator (LT1529-3.3 for instance)
- 1 x 12V 1.5A charger
- 1 x Female plug (same size as the charger's plug)
- 1 x Prototyping board
- 1 x Latching solenoid valve (scavenged from an Orbit 58874N)
- 3 x Momentary push buttons
- 1 x Rocker switch
- 3 x Straight male headers
- Some wires
_calendarName: the calendar name that is going to be taken into account_checkInRate: the polling rate
Change the constants according to your needs:
DEFAULT_WAKEUP_RATE: how long should the device be sleeping between each polling. This is the default value which will be overriden at the first call to the Google ScriptSSID: your wifi's SSIDPASSWORD: your wifi's passwordSCRIPT_ID: your Google Script ID (can be found in the deploy url)DEBUG: turn to 1 if you want to see debug information in the console logCLOSE: ESP pin number that is connected to the close input of the driverOPEN: ESP pin number that is connected to the open input of the driver