Hi, I just downloaded the fili (.aia) file that you can find here: drive.google.com/file/d/1e3B0gHbiUAw8cpmvVe_4B76QDd3WyKkg/view?usp=sharing . Download it and in MIT app inventor under the project you have the option to import .aia files. From there you can edit the app. Good luck :-)

@@seafoxc Thank you very much! But I do have yet another question. I opened that link in MIT app inventor and noticed there there are no secondary screens when you tap a drink you would like. Rather than opening up another screen, it has the bluetooth client sending a byte number. Do I need to change the provided Arduino code in order to see these bytes?

​@@markfleming5056 I had a lot of bugs when using multiple screens and the Bluetooth module in MIT app inventor. When you are connected and change screens the physical Bluetooth module will disconnect with no way to reconnect it without powering off and on the app on my phone. I tried every way to counter this but it was not possible. Then I found a lot of post with people with the same problems. For example: groups.google.com/forum/#!searchin/mitappinventortest/bluetooth$20lost$20connection%7Csort:date/mitappinventortest/aDeGr1zrf_Y/w1xCskJFAQAJ So I abandoned the idea and made one screen like advised. To see the Bluetooth codes send to the Arduino you can connect the Arduino to your PC and wit the serial prompt you will see the codes in hex. You may already noticed it but in the MIT app inventor code you send numbers like "97" and if you read it out in the Arduino it will receive "a". This is because you send the characters in the MIT app with the ASCII code: embedded.fm/blog/2016/3/29/ew-number-representation and "97" in this example is the code for "a".

@@seafoxc Thank you! That helped out a ton. We have got everything working now, but we had one more question for you. The pumps we have are pretty slow. I know how to change the time it runs in the program, but was wondering if there were a way to have multiple pumps running at the same time so that our slow pumps could make a drink faster. Do you have any ideas how to manage that? Again, thank you for all of your help!

@@markfleming5056 I also had that on my to do list for improvements. You have two options. The easiest but the most work is to write for every cocktail a program and start all pumps at once (if you do this make sure your power supply can handle it with the starting current). Then you power the pump off with the smallest quantity. then you add a delay to stop the pump with the second less quantity and so on. This is quite some typing but I did it this way the first time I build it. The second option is to use multiple timers in a class. I will try this in a couple of days when I find the time. I don't know for certain if I can do it and I think it would be rather complicated but you can also try. Good luck!

friend. which pins of the Bluetooth module you connected?

I don't know of the pumps are suitable for that application. You can make a test it with one pump and take it from there. Good luck!

@@seafoxc I let you know. Mostly every element is liquid as oil and vinagear... Thank you!

1qF, there is a link in the description. If you go like 5-10% higher as rated on the datasheet there likely to be no problem. In the factory the also do a burn in test and also use higher currents. The condensator will probably fail much sooner but I don't think that's a problem even if you drink 10 cocktails a day for 5 years..

The supply voltage may be 6V but the voltage on the TX pin on the bluetooth module only allows 3,3V. I don't think it is necessary to connect it because we are not sending data from the bluetooth module to the phone. Only receiving data. My app will not work with your module I think. There is a difference in Bluetooth protocol and Bluetooth Low energy in the MIT app inventor app so keep this in mind.

@@seafoxc Thanks for the answer. I've made my own app on Xcode for IOS, and it's working, but for the tests I've just connected the Module directly to the Arduino, am I damaging it ? Doesn't the module lower the voltage on its own? Thanks

@@Cesar-jy1qo I searched some forums to get you that answer and what I learned that it if you don't do it may not result in damaging it but it can cause malfunctions and unreliable connection. arduino.stackexchange.com/questions/39971/arduino-with-hc-08-bluetooth-module So if I where you I would solder a voltage devider togheter or use breadbord. I'm glad it works !

A quick look at teh specs and I see the Rasberry Pi has 24 IO. You only need 8 for the relayboard. You can use the same relayboard and pumps;. Just the prgramming will be different. I have no experience with the rasberrypi but I wish you good luck!

You have to connect the capacitors between the terminals and also connect the wires to them so It is hard to do so with clamps. You can find a detailed picture of what I mean in the project description here: bit.ly/30gKRRH . Maybe one way it can be done is with a hot glue gun but I would not recommend this. I wish you good luck!

you can't solder without one...

I have the same problem. I tried solving it with a funnel where all the hoses came in and added a flow meter at the end but cheap flow meters are no good for such small quantities (you can see this design with my 16bottle cocktailmaker). A semi solution is to use large glasses so the error is not that high. If I revisit the cocktail maker I will try to solve it with a weight sensor under the glass to detect the flow...

Just flip the bottles and scrap the pumps

Yes, it will work on 12v through the DC power jack (not the VIN pin!). If you connect the powersupply in parallel the current drawn by the Arduino will be very low and not anywhere near the Maximum current the powersupply can provide.

Connecting them with a layer of solder Is fine. You should try to run each pump individually to find the pump that causes the problem. Then you maybe try soldering a new capacitor. If the issue is with all the pumps you should check if you used the right capacitors (1microFarath). It took me like 20 hours to figure out the problem and find the solution by adding the capacitor so don't worry by asking this question 🙂

Thanks for the info. This is the link www.hackster.io/Seafox_C/cheap-portable-cocktail-maker-barbot-with-app-4f9079 I will change it in the description also.

@@seafoxc Thanks!

Trail and error and adjusting. I also made a mode to start the pumps for 1s so the pumps and tubes are filled with liquid. I made some versions before with a flow sensor but it is hard to not measure the air (I made a funnel where all the tubes came in before going to the glass). But after experimenting with 3 flow sensors It was still to hard to accurate count small liquids. Just testing it and adjusting the timers had a good result. This also the reason I recommend larger glasses for a better result.

@@seafoxc thanks a lot for the info

It would be cool to set all the cocktail in the app and send a string with the data for the cocktail! At the moment the app just sent a number to the Arduino and all the parameters of the drink are set in the Arduino. It would need a rewrite to both codes to make it work.

sorry but I have no experience with in app payment. You should implement it in the MIT app inventor app. You can fiend the AIA file that you can open in app inventor on the Arduino project page (code section). You can find the link in the description of this video. I did a quick search and it is possible to add payment methods community.appinventor.mit.edu/t/payment-option-inside-my-app/20968/2 One quick tip if you start to change the app is that you can not have Bluetooth on multiple screens show you will have to work with one screen and pop-ups. You could also try to write the app in an other program but MIT app inventor is the most beginner friendly. Good Luck!

@@seafoxc Thank you for these detailed response. You are very helpful and I am going to view and like ALL your videos because you take your time to respond to each comment and even do research. THumbs Up!

I'm sorry, Ik have 0 experience with the rasberry pi... The only tips I can give is to not use an apple phone (does not support HC05) and make sure the TX of the bluetooth is connected with the RX of the pi and vice verca.

5A 12v dc

You have to hold down the button for 1s. I added this feature to avoid accidental touches and spills... If that doen not work try to follow the tutorial again (the standalone video about installing the app). If it still does not work. Try to use the serial monitor on the Arduino and see if the character is received by the Arduino.

@@seafoxc seasonal greetings and thanks for the reply. i downloaded a bluetooth terminal app onto the tablet. I can see via the app what is happening in the serial monitor but again if i try sending the character via the bluetooth terminal app nothing appears within the arduino serial monitor. i am using the arduino mega if this makes a difference at all?

@@jimitsu make sure the voltage divider is working properly. And the wiring between the rx pin of the arduino should be connected to the tx pin of the arduino and vice verca. The light stops blinking of the bluetooth module right?

An other question. What do you send to the Arduino with the bluetooth terminal app? You should send "98" to the arduino with the app. This is because it is using ASCII.

@@seafoxc hi thanks for the advice, i think it was todo with the fact i am using the mega and not the uno. i managed to get it working by changing pins to 19/18 and using serial1. i also made the mistake of creating the mit app using multiple screens and had bluetooth dropouts issues. ive read you can make virtual screens within mit app creator, have you had any experience with this as im worried the amount of drinks im hoping to have may cause app crashes. cheers again

Yes sure: bit.ly/3tF1e9z I will also change this in the description. It is the 1UF (1qF) you need.

You can find the AIA file here: www.hackster.io/Seafox_C/cheap-portable-cocktail-maker-barbot-with-app-4f9079 (under the code section). Good luck!

mmm, Do you mean with a display and up and down buttons to make the choice? Or do you mean with a potentiometer? Both is possible of course. You should change the code for every IF statement for the cocktail. I think that changing the code will be more of a challenge then using a Bluetooth module and installing the app but you can learn a lot this way. I would advice to first set up all the pumps and download the original code and send characters with the serial monitor to the Arduino to make sure everything works. for example "t". This will start all the pumps for 4s one by one. After you make sure this works you can change the code so instead of "if (state == 't')" to your IF statement for example "if ((potentiometerValue < 40) && (potentiometerValue > 60)". You should first learn some basics about analogue input signals and stuff to make this work but it is for sure possible. Sorry I'm not answering in French but my French is really rusty and just plain bad :-).

@@seafoxc merci pour votre réponse mais pense que ca va être un peut dure a programme pour moi a votre code j ai rajoute un ecran et un neopixel pour eclaire le verre en fonction de cocktail bon soirée a vous

@@Atlantis007 nice upgrades! good luck with your project!!! :-)

Go to the project page: bit.ly/30gKRRH an the scroll down until you come to the code section. You have one tab with the Arduino code and one file called "App source file" this is the AIA file.

By hand because sugar water has a very different viscosity to wodka. It is not a very accurate methode but if you make large drinks the small errors are not noticed.

@@seafoxc Ok, I'll try to do it with esp32 and web. I thought about returning the ingredients and the time to turn on the pump in json. I will learn your code. But if you share this information with me, I will be happy Mix(1500,1500,0,0,1800,1200,0,0); // Vodka, Triple Sec, Cranberry Juice, Sprite, Lime Juice, Sugar Water, Blue Curacao, Gin Vodka - 1500 = 1.5 sec = ml? Triple Sec- 1500 = 1.5 sec = ml? Lime juice- 1800= 1.8 sec = ml? Sugar water- 1200 = 1.2 sec = ml? My esp32 will arrive next week

If you live in Europe it should be H05V-K 0,75(mm²). www.interpower.com/ic/designers/designing-for-export/guides-and-charts/ic-harmonized-wire-coding.pdf. I don't know the codes in the US.

With the new project hub is something wrong... I posted it also here: www.hackster.io/Seafox_C/cheap-portable-cocktail-maker-barbot-with-app-4f9079 And I alsh changed the link in the description.

Hi Kerem, The white wire is just a USB A cable to power on the Arduino Uno (connected to my bluetooth speaker as that I use as a power supply). If it was not for COVID I would test it outdoors with a couple of friends (12V battery for the motor and the wirless speaker to supply the 5V to the Arduino). You do not have to code the MIT app yourselve. You can just download it and install it. I also included on the project arduino project HUB. You could change it if you download the AIA file and import it in the MIT app inventor. I'm planning to make a new cocktailmaker (in the next two months) that is more pollished with 3D printed parts. In that video I will include some insights in the MIT app inventer code.

@@seafoxc Hello again, thanks for the answer it really helped me out. But i got another question, the wires youre using which ones exactly are they? Can you send me a example of them?

@Kerem The small wires (to connect to the HC-05 bluetooth and between the Arduino and the relayboard) are jumper wires. Some male to female some male to male example: bit.ly/2OJVWHB. The larger wires (from the power supply to the relayboard and the relays to the pumps) are just regular copper wires with a section of 0,75mm² (or AWG 20 if you use Merica units). I would recommend buying the copper wires at your local hardware store. And use two colors to make it easy to troubleshoot. The example of the copper wires: eshop.wurth.be/PVC-single-core-H05-H07V-K-fine-wire-SNGLCONDWRE-H05V-K-OR-10SMM/0970601013.sku/en/US/EUR/ A tip if you are not used to work with electricity: If you use this save power supply you don't have the risk of electrocution bit.ly/3qZ8UhC which is a nice feature to have when you work with liquids... The spec for the amperage must be at least 8A because of high starting current of the pumps.

@@seafoxc thank you very much 🙏

@@seafoxc Hello again, i bought the same transormator as you but i dont know how to connect with the ac input you show a black wire behind the transformator but i dont know how to connect that and in the schematic i dont really understand how you connected it with the voltage

I have like 5 ESP8266 laying around not used for anything so I guess that would be a good way to get started. I'm also thinking about an even more compacter version with 3D printed parts.

You can find this on the Arduino Project HUB under the section "Code". Good Luck!😀

Does it fail because the Red and blue Power cable need ferrules for the Power supply hole?

The relay board u use is positive logic or you use the NC (Normally Closed) connection on the Relay. I would advise changing your wiring (if you wired it NO change it to NC or vice versa). You could also change the code (changing all 1 to 0 for every pump) but changing the Hardware is a better idea with less likely errors.

@@seafoxc I have the ELEGOO Relay Module with Optocoupler (8 Channel/4 Channel DC 5V) and looked up the confusing chinese pinnout and understood nothing XD. Is the NO/NC located differently on this relay than on your recommended Relay? (Wasnt available in germany) Best regards

@@seafoxc I changed the wiring to NC from NO and now when i press a button on the app nothing happens :s the HC-06 module stops blinking when I connect my phone with the app and there is a consistent red light, so that I think its not bluetooth related. What could be the problem here? defect relay?

@@seafoxcOh and when i power off the 5v PowerBank connected to the arduino, all the pumps start working again all at once without control.

Sorry but I do not trust shipping something like this and from a legal standpoint I can not make machines just like that for consumers. I would suggest that you could contact a high school or college if they are interested to make something like I made for you :-).

@@seafoxc I've watching a lot of videos the last few days and I think I an idea on how to build it. I really like your 16 bottle system. On your pumps, did you ground back to the PSU or back into the relay board. Do you have a schematics for the 16 bottle one?

@@dennischang5296 I used the parts for the other machine and I don't know exactly sure how the 16 relay module was connected. I do know that you can change the code of my latest cocktailmaker and it should work. You can change the app by opening it in MIT app inventor. I have shared this a few comments below with Mark Fleming so you can find it there. The parts used are listed in the video description. You should use an Arduino Mega for that. If you will make it yourself I would suggest you buy an Arduino starter kit (original or Aliexpress/wish are options) and start learning some basics. Be sure you remember to not forget the theory of communicating barrels. So you have a container higher then the bottle at the back (see the white thingy in that video). or position the glass higher then the bottles. I wish you good luck!

Happy to hear! If you have any problems or quistions, let me know :-).

Hi, i have the same problem now, can you give me some hints?

Yes, you can find the details about the project in the description.

The manufacture of the pump claims so and because they are membrane pumps and made put of plastic I believe them 😃. It also mathers that you clean them afterwards by flushing them with clean water.

@@seafoxc cool thanks. did you ever test flow rate? i'm hoping for 400ml/min or more

@@chychywoohoo It is more like 1,5-2l /min. I made a video a year ago bout the pumps. Not the best video but you can find it on my yt channel.

@@seafoxc ok thanks!

No, I also discovered that apple does not support the bluetooth chip bt05 used in the project. So it is not even discover able with an apple device... I build a version for my friend and he is an apple user. He bought a small android tablet to use the machine.

@@seafoxc what android device did they buy? I was thinking of getting one for my recreation of this amazing project!

@@sethrosenblatt7137 I asked him and he did not bought a new one but instead used an old tablet of his parents. It was one of the first generation tablets and a few years old so I would not recommend it :-). So your model will depend on what you need. If it is only for the cocktail maker app you could go really cheap. If you also want to use it for other stuff you are going to do some research to find a tablet for your needs. Good luck with the project :-) !!!

I included a cleaning cycle for the end of the day. By no means would this installation replace a barman and it has a lot of limitations but I just wanted to build it...

If it brings the price of drinks down, automate, but the design may be better with the upside down dispenser nipples.@@seafoxc

Because the coils are actuated by the 5V from the Arduino.

I have no instagram or twitter but you can react to this comment when you have any troubles. 🙂

@@seafoxc Sure, thank you! :)

@@seafoxc Can you tell me how I can add a new cocktail to the app? I am trying to figure out how to do that through MIT inventor but not able to

@@lubalubadubdub The app send a letter to the Arduino. For example if you press on the Button "Vodka Cranberry" you can see there is an action in the blocks section of MIT app inventor to send a "104" to the bluetooth client (the Arduino). "107" is the letter "k" if you look it up in the ACII table (simple.wikipedia.org/wiki/ASCII). In the Arduino the number will trigger a certain amount of each drink. // Vodka Cranberry if (state == 'k') { Serial.println("Vodka Cranberry in the making"); Mix(2000,0,5000,0,0,1200,0,0); // Vodka, Triple Sec, Cranberry juice, Sprite, Lime juice, Sugar water, Blue Curacao, Gin } In this drink there is is 2s of Vodka, 5s cranberry juice and 1,2s Sugar water. You can either make a new button and send a new letter. For example "118" (v). By adding a new button and a new code block. And in the Arduino copy paste an other drink an change the character (in this example to v)and change the values to what yo want to mix). I will make a video about it in the coming days to cover it.

@@seafoxc Thanks man, this was really helpful.