You should see output similar to this in the serial monitor: Dallas Temperature IC Control Library Demoįound device 0 with address: 2861652405000062īoth sensor cables were routed through the hole where the fridge thermostat was positioned before removing it. To obtain the unique device ID for the thermometers used in the main program, we wired both sensors up to a breadboard and flashed the Tester code that comes with the library. The Arduino Dallas Temperature library makes it easy to read these sensors using the MKR1010 board, and you can install it into the Arduino IDE from the Library Manager. We soldered telephone wire to each sensor insulating the connections with heat shrink tubing and surrounding the end with a second shrink wrap tube. ![]() These are accurate to +-5 degrees celsius in 9-bit resolution and operate using a one-wire bus.Įach sensor has a separate +3.3V power, and ground connection with a shared data line pulled up to +3.3V by a 4.7k Ohm resistor. Temperature data and heater / cooler states are sent via an MQTT client running on the Opla to a remote server running an MQTT / InfluxDB / Telegraf / Grafana stack to record the brews progress and for dashboard monitoring from any device.Ī pair of Maxim Integrated DS18B20 digital thermometers measure the beer and air temperature inside the fridge. Once this is saved, the device switches into monitoring mode, where it samples both a beer and air digital thermometer and controls the heater and cooler in the fridge, keeping your brew at just the right temperature. The menu is presented when the Opla starts, and you choose a brewing process. We used the touch-sensitive buttons on the front of the unit to create a menu of brewing processes for fermenting and finishing, each one having a different temperature profile. The whole unit is enclosed in a plastic case that’s practical and good looking. It’s also got a nice OLED display for showing the beer temperature in traffic light colours, LED’s connected to the relays to show their status. With an MKR1010 module on board, connecting to your local network means you can keep an eye on the progress of your brew from any device and record its temperature profile over time. It’s quite capable of monitoring a couple of temperature sensors in real-time and has two built-in relays for actuating switches. The Arduino Opla is a great kit to base the Beer Controller on. Warning: Care needs to be taken when dealing with mains voltages – if you are not sure about this, consult a qualified electrician. ![]() We will update this project once our OKbrew will be ready bottled. Beer then should brew for almost 10 days. However, the brewing process itself takes additional time. If you’re wondering how long does it take to brew beer, please note that this project walks you only through the steps of setting up the home brewery and should take about 6 hours to complete.
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