How it works:

One microcontroler, in this case ESP8266, take temperature from fermentor with LM65, and take control of temperature switching on/off a pump. This pump is connected to a cold bench, to transfer cold to fermentor.

When ESP8266 take a temperature of fermentor, push this temperature and pump status to InfluxDB.

Config InfluxDB:

Install it with: sudo apt install influxdb, or run it Docker(https://hub.docker.com/_/influxdb/). Everyway add this is the configuration to standard config:

/etc/influxdb/influxdb.conf

[[udp]]
  enabled = true
  bind-address = ":8089"
  database = "fermentador_1"

This allows esp8266 to push data to InfluxDB over UPD port.

Config Grafana:

Using docker: https://hub.docker.com/r/grafana/grafana/

Configrue grafana to use Influxdb as: http://docs.grafana.org/features/datasources/influxdb/.

Config mos to push to InfluxDB:

vim src/main.c:

static const char* influx_db_server = "udp://192.168.1.234:8089";

Replace 192.168.1.234 with your influxdb server.

Install mos:

curl -fsSL https://mongoose-os.com/downloads/mos/install.sh | /bin/bash
~/.mos/bin/mos --help      
~/.mos/bin/mos

Clone Fermentator Controler:

git clone https://github.com/p3likan0/fermentor-controller.git

Build:

mos build --arch esp8266

Flash:

mos flash

Console:

mos console

Build && Flash && Console:

mos build --arch esp8266 && mos flash && mos console  

Configuration:

Get configurations

mos call Config.Get '{"key": "temperature.up_limit"}'

mos call Config.Get '{"key": "temperature.down_limit"}'

mos call Config.Get '{"key": "temperature.termic_inertia"}'

mos call Config.Get '{"key": "temperature.samples_to_average"}'

Get configurations

mos config-set temperature.up_limit=20

mos config-set temperature.down_limit=20

mos config-set temperature.termic_inertia=0.7

mos config-set temperature.samples_to_average=6

Tunning Grafana it looks like: