For full detail go till https://iblopper.bubble-logger.com/bubble-logger-spindel-connect
Floating Bubble-Logger
Temperature Controller
Send your data till Cloud
“Builders-Ware
Fermeters to use
Questions/contact
Building a “Bubble Logger SPINDEL
Needed parts and Diagram
Building a “Bubble Logger SPINDEL
For full detail go till https://iblopper.bubble-logger.com/bubble-logger-spindel-connect

Published October 24, 2020

Bubble Logger SPINDEL + CONNECT

The “Bubble-Logger SPIEDEL” is an Arduino based floating hydrometer there monitor your fermentation for beer making.

IntermediateShowcase (no instructions)2 hours3,692

Things used in this project

Hardware components

Arduino Nano 33 BLE Sense

Software apps and online services

Arduino IDE

Story

For full detail go till https://iblopper.bubble-logger.com/bubble-logger-spindel-connect/

A build-you-self floating hydrometer (“Spindel”) measuring the Activity of fermentation by sound, Gravity by angle in wort and Temperature to control a 2-channel relay. Arduino based (BLE 33 Sense and ESP32) and send data til the Cloud. Though Bluetooth connection till an ESP 32 called “Bubble Logger CONNECT” the data is display into Ubidots, Brewersfriend or Brewfather. Last, and unique, it can also control a heating-argent and cooler based on the temperature reading every 3 min. Hence, this project (build) consist of 2 Arduino devices, e.g. a floating hydrometer called “Bubble Logger SPINDEL” and a connection/controller device called “Bubble Logger CONNECT”.

Floating Bubble-Logger

“Bubble Logger SPIEDEL” is a floating hydrometer measuring the sound blops pr. min as measument of yeast activity. It also measure the angle of the floating petling together with the temperature both measured directly in the fermenting wort. The floating hydrometer send it data by Bluetooth till Bubble Logger CONNECT for further handling e.g. final calculations and sending into the cloud.

Temperature Controller

The “Bubble Logger CONNECT” (ESP32) is the data capture device taking care of sending data till cloud, but also it can use the temperature to control a 2-channel relay and hence control heating or cooling.It got the option to make use of hysteresis (0.3 °C is default).

Send your data till Cloud

The “Bubble Logger CONNECT” take care of sending all your data to the cloud in a easy way. The “Bubble Logger CONNECT send Angle, Temperature and BPM till the cloud. By polynomial/modellistic approach the angle can be turned into a SG estimates and likewise be send till the cloud. The “Bubble Logger CONNECT” send till Ubidots, Brewersfriend and Brewfather.

“Builders-Ware”

“Bubble Logger SPIEDEL” consist of a Arduino BLE 33 Sense module (sound, angle and temperature sensor). Besides the BLE 33 chip, it also needs a petling, pice of wood, LiFePO4 battery, battery holder and charger. Hence, very easy to build with only 4 soldering to do. The “Bubble Logger CONNECT is just an ESP32. The “Builders-Ware” concept offer a easy way to build a future-rice device.

Two “Bubble Logger SPINDEL”´s. Both a XXL and XL petling can be used, Where the XXL can hold a 26650 battery and the XL fits the 18650 types. ESP32 in front as “Bubble Logger CONNECT”

“Bubble Logger SPINDEL”´s by fermenting Voss Kveik yeast.

Fermeters to use?

Before you start building you should consider what fermenter to use, as not all fermenters can be used for the sound blops detection. At the very least the fermenter needs to be airtight, and as such this set a decent level and leave the buckets out.

What we need is a fermenter there makes a good and strong sound chamber where the sound can ressonace and be picked up by the digital sound sensor of BLE 33 Sense. The test I done makes my conclude, the fermenter holding best sound chamber characteristics is fermenters with hard material (e.g. metal is best), and best type are also those there hold a chronical top design with airlock in middle. But as the BPM is a relative measurement of the activity it doesn’t as such need to be exact in BPM number and many type of fermenters can be used to give a indication and relative number for the yeast activity expressed as BPM.

The desing of fermenter is important in how much sound is deteceted and how high the sound is. Hence, the coice of fermenter is important together with the water level in either S-airlock of blow-out system.

I have tested a few, Spiedles 10 and 20 L hard plastic, Mangrove Jack 25L metal tank, SS Brewtech 25L metal tank, and also a barrel of 30L and while the later was bad, most seen to work decently taken above “fermenter design” into account.

The various fermenters I have tested is the hard plastic Spiedles 10 and 20 L hard, Mangrove Jack 25L metal tank, SS brewtech 25L, and also a barrels 30L. The later is to soft and flat, hence, the sound area to little to be used for sound detection. A...

Questions/contact?

Facebook group: https://www.facebook.com/groups/2176394599141882

Building a “Bubble Logger SPINDEL”

To build a “Bubble Logger SPINDEL” the main component is a “Arduino BLE 33 Sense” there hold all the sensors we need. A battery holder, battery charger and a LiFePO4 battery is also needed besides a few cords and glue. Only 4 soldering points need to be done and all is assembled on some wood. The choice of wood is based on beaning conveniently avaivble everywhere, but also it hold some good properties for muting sound inside the petling.

The choice of LiFePO4 is mainly it provide a very precise voltage not exceeding 3.6v and the BLE 33 Sense dies if you add more. Hence, LiFePO4 can provide voltage directly and no LIDO is then needed keeping build/cost down. WARNING: Do not use any other batteries as they will destroy the BLE Sense (hence no use of Lithum ion Polymer there even state 3.7v at full charge hold 4.2v). It should be noted the LiFePO4 batteries are seen as more safe and less likely to court fire plus environmental a better solution.

Needed parts and Diagram

Arduino BLE 33 Sense.

Battery holder 18650.

LiFePO4 battery charger, TP 4056.

LiFePO4 battery 1800mah.

Cord, wood (2.8cm x 12.3cm), glue.

Diagram for “Bubble Logger SPINDEL” where red is positive and black ground. The yellow indicates the 4 soldering points for this project. See more details below.

Building a “Bubble Logger SPINDEL”

To build the “Bubble Logger SPINDEL” you need to solder 4 points. Beware the antenna on BLE 33 Sense is very fragile and any of the very small metal connectors at top can easily break off. The BLE sense is placed on top and solder steady with 2 cord with needlepoints. Further, I add some glue. The charger is glued to the wood on Battery holder side and connections between battery and BLE 33 Sense is soldered.

1). Before building the “Bubble Logger SPINDEL” the 3.3v connector must be cut to enhance battery life with a factor of 3.

2). The BLE 33 sense is steadied to the woord by 2 needlepoint cords with drilled holes. Charger is glued.

3). The Needlepoints seen from top side. To ensure BLE 33 Sense is anchored a bit glue is added in each corner too. Beware the small connectors on the antenna is fragile, and hence, the BLE 33 Sense must be placed a bit aware from top of wood.

4). Battery holder is attached and cords from battery and BLE 33 Sense is connected til Battery charger (ensure positive side of battery is downwards for best balance)..

5). Placed in petling, depending on angle in water add some weight to get close till 25 degrees.

6). Final

Some would say this build miss a on/off switch, and if I ever get to make a PCB, I might include it, but with a 1800mah battery the “Bubble Logger SPINDEL” should last 30-40 days even with the current posting of every 3rd minute and if it is put to stand on the cap this is prolonged by deep sleep mode till around 50 days. Hence, to be nice to your batteries please try charge it each month.

Bubble Logger SPINDEL + CONNECT