Device Log

Overview: The device log module provides runtime diagnostics for memory, WiFi, MQTT and system events when logging is active. HealthMonitor samples heap state periodically, degrades optional services under pressure and records warnings.

Overview

The device log page is used to view system runtime logs, helping diagnose issues and monitor device status. Supports different log levels and real-time log streaming.

When troubleshooting, prioritize observing startup, network, MQTT, peripheral initialization, and memory alert related logs; after changing log level, remember to switch back to an appropriate level for field operation.

Usage

1. Enter Device Log page
2. View real-time log output
3. Filter logs by level
4. Clear historical logs

Parameters

Log Levels

Level	Description	Example
ERROR	Error information	Peripheral initialization failure, memory insufficient
WARNING	Warning information	Weak WiFi signal, sensor read timeout
INFO	General information	Device boot, WiFi connected
DEBUG	Debug information	GPIO status changes, rule execution details

Log Format

[Timestamp] [Level] [Module] Message

Example:

[12:30:45] [INFO] [WiFi] Connected to SSID: MyRouter, IP: 192.168.1.100
[12:30:46] [INFO] [MQTT] Connected to broker
[12:31:00] [DEBUG] [PeriphExec] Rule "LED Flash" triggered
[12:31:05] [WARNING] [Sensor] DHT11 read timeout

Configuration

Change Log Level

Set log level in Device Configuration:

• ERROR: Only display errors (recommended for production)
• INFO: Display normal operation information (default)
• DEBUG: Display all detailed information (for debugging)

Troubleshooting

Issue	Possible Cause	Solution
Log refreshing too fast	Too many DEBUG messages	Switch to INFO or WARNING level
No logs visible	WebSocket not connected	Refresh page
Incorrect log time	NTP not synchronized	Check network and NTP configuration
Memory interrupts	Log buffer full	Clear periodically or reduce log level