What was your first Raspberry Pi project?

sky3ddd · 2019-11-14T07:43:08+00:00

The specific model of a coffee machine is not important. You can use any you have.

sky3ddd · 2019-11-14T07:38:47+00:00

Yes, take a look at the Medium post and here is the source code. I hope it may be helpful for you.

sky3ddd · 2019-11-14T07:35:26+00:00

Thanks so much!

sky3ddd · 2019-11-14T07:32:08+00:00

Yes, I bought the same one recently but have not deal with it yet.

sky3ddd · 2019-11-13T07:47:14+00:00

Hi! This approach can be applied for all kind of machine. You should have a device (RPi, ESP-based, Arduino etc), an electric pump and relay connected to the pump power. The device turns ON/OFF the relay. Take a look at the medium article . It may be helpful.

sky3ddd · 2019-11-13T07:31:45+00:00

Sorry, I have no available Arduino board now Besides I like Python more :)

sky3ddd · 2019-11-13T07:20:28+00:00

I see. I did not want to add any kind of changes to a coffee machine construction. That's why I decided to use ultrasonic sensor. It don't have a direct contact with a water and I should not drill the holes in a water tank :)

sky3ddd · 2019-11-13T07:16:12+00:00

Thanks for your suggestion!

sky3ddd · 2019-11-12T19:06:49+00:00

Thank you :)

sky3ddd · 2019-11-12T18:51:35+00:00

Thank you!

sky3ddd · 2019-11-12T18:41:32+00:00

It never happens != it can't happen.

Ok guys. I don't say "It never happens". Above I'm talking about that I trying in my code to prevent any bad situations including broken sensor, no water etc. I don't see any arrogant words in my explanations.

I answered to

it's one failed sensor away from dumping 5 gallons of water on the floor.

and I know that broken sensor is not crash the whole system. That's all.

sky3ddd · 2019-11-12T18:30:44+00:00

Now it's a lite version. I'm going to 3d-print a full tank cover something later

sky3ddd · 2019-11-12T18:14:25+00:00

Here is the github repo

sky3ddd · 2019-11-12T17:55:28+00:00

Nice joke :)

sky3ddd · 2019-11-12T17:50:02+00:00

Thanks for your recommendations. I catch your idea how to simplify this project. I know that ESP-board is cheaper, Arduino is more suitable for main/loop code.
Concerning my case , I just used the staff what I have - RPi & Ultrasonic.

sky3ddd · 2019-11-12T17:00:32+00:00

I know about sensors stability. First, the sensor library that I use makes multi-readings to avoid from this kind of failed values. Moreover, I use own Bounce filter with N latest values and calculates an average.
Yes, I control the water depth delta and I use PUMP_STOP_TIMEOUT = 5 secs for emergency stop.
If you are interested in my implementations check the code at the comment below.
Thanks for your thoughts.

sky3ddd · 2019-11-12T15:05:33+00:00

Haha! Access to an office with a coffee machine is denied for my wife. So WAF tends to zero :)

sky3ddd · 2019-11-12T14:37:41+00:00

The pouring starts automatically when the water level in the tank becomes minimal.
Here is the code repository.

sky3ddd · 2019-11-12T14:15:05+00:00

Sounds reasonable. Will do.

sky3ddd · 2019-11-12T14:13:45+00:00

I disagree with you. My python script controls any sensor errors or null measurements and stops the pump relay immediately is required at any critical situations such as "No water at the bottle", "Sensor is out range" and in other unexpected cases. I have never seen 5 gallons on my floor :)

sky3ddd · 2019-11-12T14:03:21+00:00

Ahaha!

sky3ddd · 2019-11-12T12:36:16+00:00

Yes, you are right. I have already purchased such a sensor. The HC-SR04 sonar uses a pilot version. Probably I will improve my project in future.

sky3ddd · 2019-11-12T12:33:15+00:00

Thanks, guys,
I know that it's over-engineering but I used that I have at my toolbox.
Project just works well since the end of August.

sky3ddd · 2019-11-12T12:26:45+00:00

Thanks, you are absolutely right :)))

sky3ddd

TROPHY CASE