theoretick/esp8266_prometheus_exporter_for_ds18b20_temperature_sensors

ESP8266 (Espressif 8266) Prometheus Exporter for DS18B20 OneWire Temperature Sensors

ESP8266 (Espressif 8266) Prometheus Exporter for DS18B20 Temperature Sensors

Exposes a prometheus exporter endpoint endpoint for scraping DS18B20 temperature sensor readings.

Usage

1. Configure ssid and password for wifi network within main.cpp
2. Build library against 8266 platform
3. hit /metrics endpoint for reading temperature (C), temperature (F), device resolution, and device count:

❯ curl 10.0.1.1/metrics

# HELP beertemp_device_total A count of probe devices connected.
# TYPE beertemp_device_total gauge
beertemp_device_total 1
# HELP beertemp_device_temperature_celsius Current device temperature in celsius.
# TYPE beertemp_device_temperature_celsius gauge
beertemp_device_temperature_celsius{id="28d1813592066618" resolution="12"} 22.69
# HELP beertemp_device_temperature_fahrenheit Current device temperature in fahrenheit.
# TYPE beertemp_device_temperature_fahrenheit gauge
beertemp_device_temperature_fahrenheit{id="28d1813592066618" resolution="12"} 72.84

esp8266_prometheus_exporter_for_ds18b20_temperature_sensors's Issues

Negative temperature bug

Thanks for a nice project, this is exactly what I'm looking for!

However, when I measure the temperature in my freezer (-18 Celcius) I get some non standard characters in the output:

$ curl -s http://fridge_device/metrics
# HELP fridgetemp_device_total A count of probe devices connected.
# TYPE fridgetemp_device_total gauge
fridgetemp_device_total 1
# HELP fridgetemp_device_temperature_celsius Current device temperature in celsius.
# TYPE fridgetemp_device_temperature_celsius gauge
fridgetemp_device_temperature_celsius{id="2865ecb5050000e8" resolution="12"} -17.38ˉ�?͉�?���?ډ�?�������?
# HELP fridgetemp_device_temperature_fahrenheit Current device temperature in fahrenheit.
# TYPE fridgetemp_device_temperature_fahrenheit gauge
fridgetemp_device_temperature_fahrenheit{id="2865ecb5050000e8" resolution="12"} 0.73
$

I think it is better to convert it to a string instead of a character array? #2