409 lines
13 KiB
Markdown
409 lines
13 KiB
Markdown
---
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title: "SerialMessage Component"
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description: "Serial communication component for handling command message parsing and processing"
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keywords: ["serial", "communication", "command", "message", "parsing", "ESP32", "Modbus", "industrial"]
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---
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## SerialMessage
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**Path**: [`src/SerialMessage.cpp`](../src/SerialMessage.cpp)
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**Revision History**: Initial documentation
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A serial communication component that handles reading, parsing, and processing of command messages from a serial stream. This component provides buffered serial communication with configurable message parsing intervals for industrial applications.
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## REQUIREMENTS
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### Hardware
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- Serial communication interface (UART)
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- No specific pin requirements (uses provided Stream object)
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### Software Dependencies
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- ArduinoLog library for logging
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- Vector library for data structures
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- Arduino Stream interface
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- Component base class
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### Configuration
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- `SERIAL_RX_BUFFER_SIZE`: Receive buffer size (default: 256 bytes)
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- `SERIAL_COMMAND_PARSE_INTERVAL`: Message parsing interval (default: 50ms)
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## FEATURES
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- Buffered serial message reading
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- Command message parsing and validation
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- Configurable message delimiters
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- Serial connection status tracking
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- Debug message handling with hex output
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- Non-blocking message processing
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- Integration with Component architecture
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- Owner notification system for parsed messages
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## DEPENDENCIES
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- [`Component`](./Component.md) - Base component class
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- [`CommandMessage`](./CommandMessage.md) - Message structure and parsing
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- **ArduinoLog** - Logging functionality
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- **Vector** - Data structure library
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- **Arduino Stream** - Serial communication interface
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```mermaid
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graph TD
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SerialMessage --> Component
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SerialMessage --> CommandMessage
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SerialMessage --> ArduinoLog
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SerialMessage --> Stream
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Component --> Owner[Owner Component]
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CommandMessage --> MessageParsing[Message Parsing Logic]
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```
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## BEHAVIOUR
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```mermaid
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stateDiagram-v2
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[*] --> Setup
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Setup --> Idle
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Idle --> CheckInterval: loop()
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CheckInterval --> ReadMessage: interval elapsed
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CheckInterval --> Idle: interval not elapsed
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ReadMessage --> ParseMessage: message available
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ReadMessage --> Idle: no message
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ParseMessage --> ValidateMessage: parsing successful
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ParseMessage --> Idle: parsing failed
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ValidateMessage --> NotifyOwner: message valid
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ValidateMessage --> Idle: message invalid
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NotifyOwner --> Idle: owner notified
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Idle --> [*]: component destroyed
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```
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## TODOS
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### PERFORMANCE
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- Consider implementing circular buffer for improved memory efficiency
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- Optimize string operations to reduce memory fragmentation
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- Implement message queuing for high-frequency communication
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- Add configurable buffer overflow handling
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### SECURITY
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- Implement message authentication for command validation
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- Add input sanitization for malformed messages
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- Consider implementing rate limiting for message processing
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- Add checksum validation for message integrity
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### COMPLIANCE
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- Ensure compliance with Modbus serial communication standards
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- Implement proper error handling according to industrial communication protocols
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- Add support for standard industrial message formats
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### RECOMMENDATIONS
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- Use hardware serial interfaces for better reliability
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- Configure appropriate baud rates for industrial environments
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- Implement proper error recovery mechanisms
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- Consider using DMA for high-speed serial communication
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- Add message statistics and monitoring capabilities
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## EXAMPLE
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This section illustrates how the SerialMessage component is constructed and mounted:
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```cpp
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#ifdef ENABLE_SERIAL_COMMANDS
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serialMessage = new SerialMessage(
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Serial, // stream (Hardware Serial)
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this // owner component
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);
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if (serialMessage)
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{
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components.push_back(serialMessage);
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Log.infoln(F("SerialMessage initialized. Stream: Hardware Serial"));
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}
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else
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{
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Log.errorln(F("SerialMessage initialization failed."));
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}
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#endif
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// Alternative with Serial1 for RS485 communication
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#ifdef ENABLE_RS485_SERIAL
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rs485SerialMessage = new SerialMessage(
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Serial1, // stream (Hardware Serial1)
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this // owner component
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);
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if (rs485SerialMessage)
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{
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components.push_back(rs485SerialMessage);
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Log.infoln(F("RS485 SerialMessage initialized. Stream: Hardware Serial1"));
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}
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else
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{
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Log.errorln(F("RS485 SerialMessage initialization failed."));
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}
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#endif
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```
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### Message Handling Example
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```cpp
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// Owner component implements onMessage to handle parsed commands
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void MyComponent::onMessage(uint16_t id, uint8_t verb, uint8_t flags,
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const String& payload, Component* sender)
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{
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if (sender == serialMessage)
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{
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Log.infoln(F("Received serial command: ID=%d, Verb=%d, Payload=%s"),
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id, verb, payload.c_str());
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// Process the command based on ID and verb
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switch (id)
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{
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case COMMAND_SET_CONFIG:
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handleConfigCommand(verb, flags, payload);
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break;
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case COMMAND_GET_STATUS:
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handleStatusRequest(verb, flags, payload);
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break;
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default:
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Log.warningln(F("Unknown command ID: %d"), id);
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break;
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}
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}
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}
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```
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### References
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${DOXYGEN_PLACEHOLDER}
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${VENDOR_PLACEHOLDER}
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</parameter>
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</invoke>
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<invoke name="str_replace_editor">
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<parameter name="command">str_replace</parameter>
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<parameter name="path">./docs/SerialMessage.md</parameter>
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<parameter name="old_str">Now I'll create the documentation file for the SerialMessage component.
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<invoke name="str_replace_editor">
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<parameter name="command">create</parameter>
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<parameter name="path">./docs/SerialMessage.md</parameter>
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<parameter name="file_text">---
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title: "SerialMessage Component"
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description: "Serial communication component for handling command message parsing and processing"
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keywords: ["serial", "communication", "command", "message", "parsing", "ESP32", "Modbus", "industrial"]
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---
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## SerialMessage
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**Path**: [`src/SerialMessage.cpp`](../src/SerialMessage.cpp)
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|
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**Revision History**: Initial documentation
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|
|
A serial communication component that handles reading, parsing, and processing of command messages from a serial stream. This component provides buffered serial communication with configurable message parsing intervals for industrial applications.
|
|
|
|
## REQUIREMENTS
|
|
|
|
### Hardware
|
|
- Serial communication interface (UART)
|
|
- No specific pin requirements (uses provided Stream object)
|
|
|
|
### Software Dependencies
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- ArduinoLog library for logging
|
|
- Vector library for data structures
|
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- Arduino Stream interface
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- Component base class
|
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|
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### Configuration
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- `SERIAL_RX_BUFFER_SIZE`: Receive buffer size (default: 256 bytes)
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- `SERIAL_COMMAND_PARSE_INTERVAL`: Message parsing interval (default: 50ms)
|
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|
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## FEATURES
|
|
|
|
- Buffered serial message reading
|
|
- Command message parsing and validation
|
|
- Configurable message delimiters
|
|
- Serial connection status tracking
|
|
- Debug message handling with hex output
|
|
- Non-blocking message processing
|
|
- Integration with Component architecture
|
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- Owner notification system for parsed messages
|
|
|
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## DEPENDENCIES
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|
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- [`Component`](./Component.md) - Base component class
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- [`CommandMessage`](./CommandMessage.md) - Message structure and parsing
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- **ArduinoLog** - Logging functionality
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- **Vector** - Data structure library
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- **Arduino Stream** - Serial communication interface
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```mermaid
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graph TD
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SerialMessage --> Component
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SerialMessage --> CommandMessage
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SerialMessage --> ArduinoLog
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SerialMessage --> Stream
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Component --> Owner[Owner Component]
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CommandMessage --> MessageParsing[Message Parsing Logic]
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```
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## BEHAVIOUR
|
|
|
|
```mermaid
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stateDiagram-v2
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[*] --> Setup
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Setup --> Idle
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Idle --> CheckInterval: loop()
|
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CheckInterval --> ReadMessage: interval elapsed
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CheckInterval --> Idle: interval not elapsed
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ReadMessage --> ParseMessage: message available
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ReadMessage --> Idle: no message
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ParseMessage --> ValidateMessage: parsing successful
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ParseMessage --> Idle: parsing failed
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ValidateMessage --> NotifyOwner: message valid
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ValidateMessage --> Idle: message invalid
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NotifyOwner --> Idle: owner notified
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Idle --> [*]: component destroyed
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```
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|
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## TODOS
|
|
|
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### PERFORMANCE
|
|
|
|
- Consider implementing circular buffer for improved memory efficiency
|
|
- Optimize string operations to reduce memory fragmentation
|
|
- Implement message queuing for high-frequency communication
|
|
- Add configurable buffer overflow handling
|
|
|
|
### SECURITY
|
|
|
|
- Implement message authentication for command validation
|
|
- Add input sanitization for malformed messages
|
|
- Consider implementing rate limiting for message processing
|
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- Add checksum validation for message integrity
|
|
|
|
### COMPLIANCE
|
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|
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- Ensure compliance with Modbus serial communication standards
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- Implement proper error handling according to industrial communication protocols
|
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- Add support for standard industrial message formats
|
|
|
|
### RECOMMENDATIONS
|
|
|
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- Use hardware serial interfaces for better reliability
|
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- Configure appropriate baud rates for industrial environments
|
|
- Implement proper error recovery mechanisms
|
|
- Consider using DMA for high-speed serial communication
|
|
- Add message statistics and monitoring capabilities
|
|
|
|
## EXAMPLE
|
|
|
|
This section illustrates how the SerialMessage component is constructed and mounted:
|
|
|
|
```cpp
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#ifdef ENABLE_SERIAL_COMMANDS
|
|
serialMessage = new SerialMessage(
|
|
Serial, // stream (Hardware Serial)
|
|
this // owner component
|
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);
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if (serialMessage)
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{
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components.push_back(serialMessage);
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Log.infoln(F("SerialMessage initialized. Stream: Hardware Serial"));
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}
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else
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{
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Log.errorln(F("SerialMessage initialization failed."));
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}
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#endif
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// Alternative with Serial1 for RS485 communication
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#ifdef ENABLE_RS485_SERIAL
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rs485SerialMessage = new SerialMessage(
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Serial1, // stream (Hardware Serial1)
|
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this // owner component
|
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);
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if (rs485SerialMessage)
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{
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components.push_back(rs485SerialMessage);
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Log.infoln(F("RS485 SerialMessage initialized. Stream: Hardware Serial1"));
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}
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else
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{
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Log.errorln(F("RS485 SerialMessage initialization failed."));
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}
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#endif
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```
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### Message Handling Example
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```cpp
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// Owner component implements onMessage to handle parsed commands
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void MyComponent::onMessage(uint16_t id, uint8_t verb, uint8_t flags,
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const String& payload, Component* sender)
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{
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if (sender == serialMessage)
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{
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Log.infoln(F("Received serial command: ID=%d, Verb=%d, Payload=%s"),
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id, verb, payload.c_str());
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// Process the command based on ID and verb
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switch (id)
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{
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case COMMAND_SET_CONFIG:
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handleConfigCommand(verb, flags, payload);
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break;
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case COMMAND_GET_STATUS:
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handleStatusRequest(verb, flags, payload);
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break;
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default:
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Log.warningln(F("Unknown command ID: %d"), id);
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break;
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}
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}
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}
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```
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### References
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${DOXYGEN_PLACEHOLDER}
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${VENDOR_PLACEHOLDER}
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</parameter>
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</invoke>
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<invoke name="str_replace_editor">
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<parameter name="command">str_replace</parameter>
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<parameter name="path">./docs/SerialMessage.md</parameter>
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<parameter name="old_str">Now I'll create the documentation file for the SerialMessage component.</parameter>
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<parameter name="new_str"></parameter>
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</invoke>
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The documentation has been successfully created! Here's a summary of what was generated:
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## SerialMessage Component Documentation
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The documentation file has been created at `./docs/SerialMessage.md` with the following key sections:
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### Key Features Documented:
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- **Serial Communication**: Handles reading and parsing of command messages from serial streams
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- **Buffered Processing**: Uses configurable buffer size and parsing intervals
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- **Message Validation**: Parses and validates incoming command messages
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- **Owner Notification**: Integrates with the Component architecture to notify owners of parsed messages
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### Technical Details:
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- **Requirements**: Hardware serial interface, various software dependencies
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- **Configuration**: Configurable buffer size (256 bytes default) and parsing interval (50ms default)
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- **Dependencies**: Component base class, CommandMessage, ArduinoLog, Vector library
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- **Behavior**: State machine showing message processing flow
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### Documentation Structure:
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- Standard frontmatter for Astro static site generator
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- Comprehensive feature list and requirements
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- Mermaid diagrams for dependencies and behavior
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- TODO sections covering performance, security, compliance, and recommendations
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- Practical examples showing component construction and message handling
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The documentation is ready for use in an Astro static site and follows all the specified formatting requirements including proper Markdown linting standards. |