gobot-pir

Detects and forwards motion events using a PIR sensor and a Raspberry PI

Features

🤖 Integrates with Home-Assistant
📊 Calculates statistics about motion events over time windows, accessible via MQTT and metrics
🔐 Allows connecting to secure MQTT brokers using TLS client certificates
🔭 Expose PIR events as metrics to enable alerting and Grafana dashboards

Installation

Binaries

Download a prebuilt binary from the releases section for your system.

From Source

As a prerequisite, you need to have Golang SDK installed. Then you can install gobot-pir from source by invoking:

$ go install github.com/soerenschneider/gobot-pir@latest

Configuration

gobot-pir can be fully configured using either environment variables or a config file.

Field Name	Type	JSON Key	Env Variable	Validation	Default	Description
Placement	string	placement	GOBOT_PIR_PLACEMENT	required	-	Placement configuration
MetricsAddr	string	metrics_addr	GOBOT_PIR_METRICS_LISTEN_ADDR	omitempty,tcp_addr	0.0.0.0:9191	Metrics address
IntervalSecs	int	interval_s	GOBOT_PIR_INTERVAL_S	min=1,max=300		Interval in seconds
StatIntervals	[]int	stat_intervals	GOBOT_PIR_STAT_INTERVALS	dive,min=10,max=3600		Statistic intervals
LogSensor	bool	log_sensor	GOBOT_PIR_LOG_SENSOR_READINGS	false		Log sensor readings
MessageOn	string	message_on	GOBOT_PIR_MSG_ON		ON	Message when event is registered
MessageOff	string	message_off	GOBOT_PIR_MSG_OFF		OFF	Message when event stops
MqttConfig	MqttConfig	-				MQTT configuration
SensorConfig	SensorConfig					Sensor configuration

Field Name	Type	JSON Key	Env Variable	Validation	Default	Description
Disabled	bool	disable_mqtt	GOBOT_PIR_MQTT_DISABLED		N/A	Disabled MQTT
Host	string	mqtt_host	GOBOT_PIR_MQTT_BROKER	required_if=Disabled false,mqtt_broker	N/A	MQTT broker host
Topic	string	mqtt_topic	GOBOT_PIR_MQTT_TOPIC	required_if=Disabled false,mqtt_topic	N/A	MQTT topic
StatsTopic	string	mqtt_stats_topic	GOBOT_PIR_MQTT_STATS_TOPIC	omitempty,mqtt_topic	N/A	MQTT statistics topic
ClientKeyFile	string	mqtt_ssl_key_file	GOBOT_PIR_MQTT_TLS_CLIENT_KEY_FILE	required_unless=ClientCertFile '',omitempty,file	N/A	MQTT client SSL key file
ClientCertFile	string	mqtt_ssl_cert_file	GOBOT_PIR_MQTT_TLS_CLIENT_CRT_FILE	required_unless=ClientKeyFile '',omitempty,file	N/A	MQTT client SSL cert file
ServerCaFile	string	mqtt_ssl_ca_file	GOBOT_PIR_MQTT_TLS_SERVER_CA_FILE	omitempty,file	N/A	MQTT server SSL CA file

Field Name	Type	JSON Key	Env Variable	Validation	Default	Description
GpioPin	string	gpio_pin	GOBOT_PIR_GPIO_PIN	required,min=0	7	GPIO pin configuration
GpioPollingIntervalMs	int	gpio_polling_interval_ms	GOBOT_PIR_GPIO_POLLING_INTERVAL_MS	required,min=5,max=500	75	GPIO polling interval in ms

Metrics

This project exposes the following metrics in Open Metrics format under the prefix gobot_pir

Variable Name	Metric Type	Description	Labels
version	GaugeVec	Version information of this robot	version, commit
heartbeat_timestamp_seconds	GaugeVec	Heartbeat of this robot	placement
motions_detected_total	CounterVec	Amount of motions detected	placement
motions_detected_timestamp_seconds	GaugeVec	Timestamp of latest motion detected	placement
messages_published_total	CounterVec	The assembleBot temperature in degrees Celsius	placement
message_publish_errors_total	CounterVec	The assembleBot temperature in degrees Celsius	placement
events_per_interval	GaugeVec	The number of events during given intervals	interval, placement
slice_entries_total	GaugeVec	The amount of entries in the stats slice	placement

CHANGELOG

The changelog can be found here