Metrics

Metric names are lowercase with digits and _. The following names are sent in telemetry, event, and status (Payload formats). A sensor that cannot be read is not sent.

Measurements

Metric	Type	Unit	Source
tN_name (default t1…t4)	number	Cel	DS18B20 per active slot
temp_ambient	number	Cel	SHT41
humidity	number	%RH	SHT41
voltage	number	V	PZEM-004T
current	number	A	PZEM-004T
power_draw	number	W	PZEM-004T
energy	number	kWh	PZEM-004T (cumulative)
frequency	number	Hz	PZEM-004T
power_factor	number	/	PZEM-004T
dN_name (default d1…d4)	boolean		digital input (true = active)
oN_name (default o1…o4)	boolean		digital output (true = ON)
uptime	number	s	ESP32
heap_free	number	By	ESP32
expander_ok	boolean		false = PCF8574 not answering
maintenance	boolean		only while maintenance mode is active

Alarms

Metric	Meaning
alarm_level	0 normal, 1 warning, 2 alarm
alarm_<name>_warn, alarm_<name>_high	temperature warning and alarm of slot <name>; trigger value in …_value
alarm_<name>_active, alarm_<name>_inactive	digital input alarms
alarm_voltage_low, alarm_voltage_high, alarm_current_high, alarm_power_draw_high	power alarms; trigger value in …_value

See Alarms.

Rules and sources

Metric	Meaning
rule_<id>	active status of each rule with en: true (boolean); rule_<id>_value if an event action uses val
flag_f1…flag_f4	flags used by the rules set
src_<id>_ok	Modbus source diagnostics (only if diag: true)
prefix_suffix	Modbus device metrics, e.g. rak1_voltage, grid_power

Status metrics (status topic)

state (online / offline), fw, model, hw, ip, gateway, and button (button events: identify, factory_reset).

Reserved prefixes

alarm_, rule_, flag_, and src_ must not be used as the prefix of a slot or source name.