lily-open-source/simple-sequencer

Explanation

Description

This code controls four relays based on the input from an analog sensor and the state of a push button. The relays are used to control external devices connected to the corresponding pins on the microcontroller. The behavior of the relays is determined by the analog sensor value and the state of the push button.

Hardware Setup

The code assumes the following hardware setup:

Pin Name	Pin Number	Description
Relay1	2/D2	Control for Relay 1
Relay2	14/D5	Control for Relay 2
Relay3	12/D6	Control for Relay 3
Relay4	13/D7	Control for Relay 4
push	15/D8	Push Button Input
analogPin	A0	Analog Sensor Input (A0)

Ensure that the hardware connections match the pin assignments defined in the code.

Code Explanation

Variable Definitions

• sensorValue: Stores the current reading from the analog sensor (A0 pin).
• deltime: Represents the delay time for each relay, calculated based on the sensor value.

Pin Definitions

The following pins are defined for the relays and the push button:

• Relay1: Pin D4 (Digital pin 2)
• Relay2: Pin D5 (Digital pin 14)
• Relay3: Pin D6 (Digital pin 12)
• Relay4: Pin D7 (Digital pin 13)
• push: Pin D8 (Digital pin 15)

Initialization

In the setup() function:

• The pin modes for the relays and push button are set. The relay pins are set as outputs, and the push button pin is set as an input.
• The relays are initially turned off by setting their corresponding pins to HIGH.

Main Loop

In the loop() function:

• The code checks if the elapsed time since the last iteration is equal to or greater than interval1 (100 milliseconds in this case).
• If the time condition is met, it reads the analog value from the sensor using analogRead(A0) and maps it to a delay time (deltime) between 1 and 255 multiplied by 15.
• It then checks the state of the push button using digitalRead(push).
• If the push button is pressed (HIGH), it sequentially activates the relays with delays based on deltime.
• If the push button is not pressed (LOW), it sequentially deactivates the relays with delays based on deltime.
• The current time is stored in currentMillis for each relay activation or deactivation.
• The previous time is updated with the current time (previousMillis = millis()) to keep track of the interval.

Flowchart

graph TD
  A[Start] --> B[Initialize Pins]
  B --> C[Turn Off Relays]
  C --> D[Loop Start]
  D --> E[Check Time Condition]
  E -- Yes --> F[Read Sensor Value]
  F --> G[Calculate Delay Time]
  G --> H[Check Push Button State]
  H -- HIGH --> I[Activate Relays]
  H -- LOW --> J[Deactivate Relays]
  I --> K[Delay]
  K --> L[Check Time Condition]
  L -- Yes --> M[Check Relay Activation Time]
  M -- Time Reached --> I
  M -- Time Not Reached --> L
  J --> N[Delay]
  N --> L
  E -- No --> D

Picture

Usage and Customization

To use this code, upload it to your microcontroller (e.g., Arduino) using the appropriate software. Ensure that the hardware connections are correct.

You can customize the code based on your requirements. Here are a few possible modifications:

• Adjust the pin assignments if you have connected the relays or push button to different pins on your microcontroller.
• Change the interval1 value to adjust the delay between iterations of the main loop.
• Modify the mapping of sensorValue to deltime to suit your desired delay range.
• Add or remove relay control logic based on the number of relays you have connected.
• Implement additional actions or conditions based on the relay states or sensor values.

Make sure to test and validate any modifications to ensure the desired functionality.

Troubleshooting

If the code is not working as expected, consider the following troubleshooting steps:

• Verify that the hardware connections are correct and match the pin assignments in the code.
• Check the power supply to ensure it is providing sufficient voltage

and current for the relays and the microcontroller.

• Ensure that the relays are properly wired and can handle the load you are connecting to them.
• Confirm that the analog sensor is functioning correctly and providing valid readings.
• Check for any error messages or warnings during compilation or upload.

If issues persist, consult the documentation or support resources for your specific microcontroller and components.

Disclaimer

This code and the associated instructions are provided as-is, without any warranty or guarantee. It is your responsibility to ensure the proper setup, testing, and safe operation of the hardware and software.