Display Actions

Action Types

Action	actionType	Description
ACTION_DISPLAY_NUMBER	24	Display number
ACTION_DISPLAY_TEXT	25	Display text
ACTION_DISPLAY_CLEAR	26	Clear screen
ACTION_OLED_DISPLAY	27	OLED multi-line template display

Configuration Examples

Method 1: Web Interface Configuration (Recommended)

The peripheral execution page is shown below. When configuring display actions, verify the target display peripheral, display content template, and refresh frequency.

When troubleshooting display actions, handle layer by layer according to the pipeline diagram: check if the data source exists, whether the template can be parsed, whether the target display peripheral is online, and whether the refresh frequency is too high.

Example 1: Display Number (TM1637 Digital Tube)

Scenario: Display temperature value 23.5 on the digital tube

Configuration Steps:

1. Edit the rule in the Peripheral Execution Management page

2. Click the Add Action button

3. Fill in the action configuration:

   Field	Value	Description
   Action Type	Select Display Number	Numeric display
   Target Peripheral	Select tm1637_1	Digital tube peripheral
   Display Value	23.5	Number to display

4. Click the Save button

💡 Tip: Supported formats: 1234 (integer), 12.34 (decimal), 12:34 (clock)

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Example 2: Display Text

Scenario: Display "PLAY" on the digital tube

Configuration Steps:

1. Edit the rule, add an action

2. Fill in:

   • Action Type: Select Display Text
   • Target Peripheral: Select tm1637_1
   • Display Text: PLAY

3. Click Save

💡 Tip: TM1637 only supports a limited character set; longer content is automatically truncated

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Example 3: Clear Screen

Scenario: Clear digital tube or OLED display content

Configuration Steps:

1. Edit the rule, add an action

2. Fill in:

   • Action Type: Select Clear Screen
   • Target Peripheral: Select tm1637_1 or oled1

3. Click Save

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Example 4: OLED Multi-line Template Display

Scenario: Display environmental monitoring data on OLED

Configuration Steps:

1. Edit the rule, add an action

2. Fill in:

   • Action Type: Select OLED Display
   • Target Peripheral: Select oled1
   • Display Template:

   #EnvMonitor
   Temp: ${dht1.temperature}°C
   Humidity: ${dht1.humidity}%
   IP: ${sys.ip}

3. Click Save

💡 Tip:

• First line starting with # is a centered title
• ${id.field} references sensor cached data
• $value references the received value at trigger time
• \n is a newline character

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Method 2: JSON Configuration File Import

Compatible Peripherals

Action	Compatible Peripherals
DISPLAY_NUMBER	TM1637(47), LCD(36)
DISPLAY_TEXT	TM1637(47), LCD(36)
DISPLAY_CLEAR	TM1637(47), LCD(36)
OLED_DISPLAY	LCD(36) - OLED only

Precautions

1. TM1637 Limitations: Only 4-digit display; longer content is automatically truncated
2. OLED Lines: 128x64 displays approximately 4-6 lines; content beyond that is not shown
3. Cache Dependency: Data referenced by ${id.field} must first be collected via SENSOR_READ
4. Refresh Frequency: Recommended OLED refresh interval ≥ 1 second