Template Sensor
The template sensor platform allows you to create a sensor with templated values
using lambdas.
# Example configuration entry
sensor:
- platform: template
name: "Template Sensor"
lambda: |-
if (id(some_binary_sensor).state) {
return 42.0;
} else {
return 0.0;
}
update_interval: 60sPossible return values for the lambda:
return <FLOATING_POINT_NUMBER>;the new value for the sensor.return NAN;if the state should be considered invalid to indicate an error (advanced).return {};if you don’t want to publish a new state (advanced).
Configuration variables
lambda (Optional, lambda): Lambda to be evaluated every update interval to get the new value of the sensor
update_interval (Optional, Time): The interval to check the sensor. Set to
neverto disable updates. Defaults to60s.All other options from Sensor.
sensor.template.publish Action
You can also publish a state to a template sensor from elsewhere in your YAML file
with the sensor.template.publish action.
# Example configuration entry
sensor:
- platform: template
name: "Template Sensor"
id: template_sens
# in some trigger
on_...:
- sensor.template.publish:
id: template_sens
state: 42.0
# Templated
- sensor.template.publish:
id: template_sens
state: !lambda 'return 42.0;'Configuration options:
- id (Required, ID): The ID of the template sensor.
- state (Required, float, templatable): The state to publish.
ℹ️ Note
This action can also be written in lambdas:
id(template_sens).publish_state(42.0);
Useful Template Sensors
Here are some useful sensors for debugging and tracking Bluetooth proxies.
# Example configuration entry
sensor:
- platform: template
name: "Bluetooth Proxy Connections Limit"
id: bluetooth_proxy_connections_limit
icon: "mdi:bluetooth-settings"
update_interval: 30s
entity_category: "diagnostic"
lambda: |-
int limit = bluetooth_proxy::global_bluetooth_proxy->get_bluetooth_connections_limit();
ESP_LOGD("bluetooth_proxy_sensor", "Current connections limit => %d", limit);
return limit;
- platform: template
name: "Bluetooth Proxy Connections Free"
id: bluetooth_proxy_connections_free
icon: "mdi:bluetooth-settings"
update_interval: 30s
entity_category: "diagnostic"
lambda: |-
int free = bluetooth_proxy::global_bluetooth_proxy->get_bluetooth_connections_free();
ESP_LOGD("bluetooth_proxy_sensor", "Current connections free => %d", free);
return free;