ESP8266 - Solenoid Lock
The Solenoid Lock, also referred to as the Electric Strike Lock, can be used to lock and unlock cabinets, drawers, and doors. This tutorial will teach us how to control the solenoid lock using ESP8266.
An alternative to the Solenoid Lock is the Electromagnetic Lock. For more information, please refer to the ESP8266 - Electromagnetic Lock tutorial.
|1||×||Micro USB Cable|
|1||×||12V Power Adapter|
|1||×||DC Power Jack|
|1||×||(Optional) 5V Power Adapter for ESP8266|
|1||×||(Optional) ESP8266 Screw Terminal Adapter|
Or you can buy the following sensor kit:
|1||×||DIYables Sensor Kit 30 types, 69 units|
Overview of Solenoid Lock
The Solenoid Lock Pinout
The Solenoid Lock consists of two wires:
- The Positive (+) wire (red) should be connected to the 12V of a DC power supply
- The Negative (-) wire (black) should be connected to the GND of a DC power supply
How It Works
- When supplying power to the solenoid lock, the lock tongue is extended, resulting in the door being locked.
- When NOT supplying power to the solenoid lock, the lock tongue is retracted, resulting in the door being unlocked.
※ NOTE THAT:
The solenoid lock typically requires a 12V, 24V or 48V power source. Consequently, it CANNOT be connected directly to an ESP8266 pin. A relay must be used to link the solenoid lock to the ESP8266 pin.
If the solenoid lock is connected to a relay (in a normally open mode):
- When the relay is not activated, the door is unlocked
- When the relay is activated, the door is locked
Connecting ESP8266 to a relay enables programming for ESP8266 to control the solenoid lock. For more information on relays, please refer to the ESP8266 - Relay tutorial.
This image is created using Fritzing. Click to enlarge image
This code causes the door to be locked and unlocked every five seconds.
To get started with ESP8266 on Arduino IDE, follow these steps:
- Check out the how to setup environment for ESP8266 on Arduino IDE tutorial if this is your first time using ESP8266.
- Wire the components as shown in the diagram.
- Connect the ESP8266 board to your computer using a USB cable.
- Open Arduino IDE on your computer.
- Choose the correct ESP8266 board, such as (e.g. NodeMCU 1.0 (ESP-12E Module)), and its respective COM port.
- Copy the code and open it in the Arduino IDE.
- Click the Upload button in the Arduino IDE to send the code to the ESP8266.
- Observe the state of the lock tongue.
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