arduino-brouwkuyp-control

Brouwkuyp brewery control software Arduino part

Hardware

Infrastructure

• AMQP Broker (RabbitMQ (3.8.9))
  • Running on port 1883 with a fixed IP of 192.68.10.10
• Arduino (Uno)
  • Running on fixed IP 192.168.10.20
• Temperature sensors (DB18S20)

Sensors

Temperatuursensor Hygrosens Temperatuursensor M10, kabel 2 m. -55 tot 125 °C. Soort behuizing Roestvrijstalen sensorbuis. Bought via Conrad, not available anymore. Alternatively we could try to have one of the following sensors, when needed.

• Emko RTR Temperatuursensor Pt100

Electrical schema

• Put 5V, Ground and Control Wire (PIN 2) on bread board (left side).
• Align your 5V, Ground and Control Wire (PIN 2) of the Temperature Sensor directly (on right side).
• Put the 2.2K resistor between the 5V and Control Wire (PIN 2) of Arduino and Sensor
  • Place the resistor closest to the Arduino, because you only need one resistor when you're using multiple sensors.
• Put one end of the resistor on the 5V and the other end in the Control Wire (PIN 2).

It's necessary to use a 2.2K resistor since all other tutorials refer to a 4.7K resistor, which doesn't work.

Software

Code

After installing the Arduino IDE, git clone this project in the /Users/<current_user>/Documents/Arduino folder. When you open the project make sure that the port to connect the Arduino with your development PC is set correctly. Double check via Tools > Port: ..., it should say something like /dev/cu.usbmodem1412101 (Arduino Uno). If there are multiple usbmodem ports, select the one with Arduino Uno in it.

Once setup correctly, you are able to verify and upload the code to the Arduino (Uno) (via the Arduino IDE).

For debugging purposes you have also access to the Serial Monitor (cmd + shift + M), via println statements in the code you may write to this log.

Libraries

The following libraries are need to be installed (via Tools > Manage libraries...:

• DallasTemperature (v3.9.0) [sensors]
  • OneWire (v2.3.5)
• elapsedMillis (v1.0.6) [timing]
• PubSubClient (v2.8.0) [AMQT messages]
• ArduinoJson (v6.17.2) [convert data to json in event]

Variables

The Arduino includes a env.h-file (to simulate a 'dotenv' like secrets config). The file needs to include the following data:

#define SECRET_MQTT_USER "<username>"
#define SECRET_MQTT_PASS "<password>"