Files

Pim van Pelt a7b78521f1 Add BME280 Sensor

- Plumb BME280 all the way through to Prometheus.
- Add README detailing the diff between BME280 and BMP280
- Refactor source files to be *_drv.c to avoid naming clashes with
  upstream libraries.

2018-03-26 15:07:17 +02:00

1.5 KiB

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Prometheus Sensors

This is a library that implements a set of sensor types, reading their values periodically and exposing them to Prometheus using the prometheus-metrics library.

Supported Sensors

DHT

This is using dht library; each sensor reading takes approximately 32ms (28ms if there is no sensor on the GPIO in). They are placed on timers so as to minimize pre-emption of the main application. DHT sensors are polled in order based on sensors.dht_gpio pins and with a period of sensors.dht_period which defaults to 3 seconds.

Please see the upstream source for more information on the driver.

Reported values (all types are gauges):

temperature{sensor="0",type="DHT"} 3.5
temperature{sensor="1",type="DHT"} 6.2
humidity{sensor="0",type="DHT"} 43.900002
humidity{sensor="1",type="DHT"} 35.599998

VEML6075

This is using veml6075-i2c library; one sensor is allowed based on I2C address on the bus, normally 0x10, but configurable with sensors.veml6075_i2caddr in mos.yml. The chip is polled with a period of sensors.veml6075_period which defaults to 3 seconds, each sensor reading takes approximately 11ms.