DIY Alkalinity Monitor

[Borat]

But let me ask you one thing.

Doesn't this have a schedule function?

The code that I posted here has a choice of 3, 4, or 5 hard-coded choices for running tests on schedule. Each will start on the 20th minute of the hour and will run with either 6 hours, 4 hours or 3 hours interval.

if(last_hour_checked!=h && !DEBUG_MODE)//check if alk monitor needs to be run
{
if(m==20)
{
last_hour_checked = h;
if(
((h==6 || h == 12 || h==18) && schedule_tests_per_day==3)
||
((h==6 || h == 10 || h==14 || h==18) && schedule_tests_per_day==4)
||
((h==6 || h == 9 || h==12 || h==15 || h==18) && schedule_tests_per_day==5)
)
{
runAlkalinityTest();
}
}
}

 

[bread1973]

여기에 게시한 코드에는 일정에 따라 테스트를 실행하기 위해 3, 4 또는 5개의 하드 코딩된 선택 항목이 있습니다. 각 시간은 매시 20분에 시작되며 6시간, 4시간 또는 3시간 간격으로 실행됩니다.

if(last_hour_checked!=h && !DEBUG_MODE)//alk 모니터를 실행해야 하는지 확인
{
만약(m==20)
{
last_hour_checked = h;
만약에(
((h==6 || h == 12 || h==18) && schedule_tests_per_day==3)
||
((h==6 || h == 10 || h==14 || h==18) && schedule_tests_per_day==4)
||
((h==6 || h == 9 || h==12 || h==15 || h==18) && schedule_tests_per_day==5)
)
{
runAlkalinityTest();
}
}
}

Thank you.

I'll fix it to only check twice a day. Thank you for your always kind reply.

 

[Borat]

Thank you.

I'll fix it to only check twice a day. Thank you for your always kind reply.

Just FIY - you may have wondered why 20th minute of the hour? I have a 12v PSU to which both Alk monitor and the 3-head doser are connected. The PSU only provides 2A - so if both the doser and the Alk monitor start to run motors at the same time there would be an issue (the would both not be able to run). So i programmed the doser to dose at 0 min, 5 min and 10 min times of the hour (there are 3 dosing heads - so same issue, I have to run each head in a separate time interval, otherwise there is not enough current) and then chose the Alk monitor to run on the 20th minute.

Eventually I will rework my aquarium controller - and it will provide 6A @12v which will be ample to provide power to all my 12v devices simultaneously.

 

[bread1973]

Just FIY - you may have wondered why 20th minute of the hour? I have a 12v PSU to which both Alk monitor and the 3-head doser are connected. The PSU only provides 2A - so if both the doser and the Alk monitor start to run motors at the same time there would be an issue (the would both not be able to run). So i programmed the doser to dose at 0 min, 5 min and 10 min times of the hour (there are 3 dosing heads - so same issue, I have to run each head in a separate time interval, otherwise there is not enough current) and then chose the Alk monitor to run on the 20th minute.

Eventually I will rework my aquarium controller - and it will provide 6A @12v which will be ample to provide power to all my 12v devices simultaneously.

[HASH=42478]#include[/HASH] <WiFi.h>
[HASH=42478]#include[/HASH] <Wire.h>
[HASH=42478]#include[/HASH] <WebServer.h>
[HASH=70522]#define[/HASH] WIRE_SLAVE_ADDRESS 9
[HASH=42478]#include[/HASH] "time.h"
[HASH=42478]#include[/HASH] <Arduino.h>
[HASH=42478]#include[/HASH] <ESP32_MailClient.h>
// Replace with your network credentials
const char* ssid = "chengyu-xiaomi";
const char* password = "xxxxx";
unsigned long last_update_time = 0;
unsigned long current_time;
unsigned long startup_time;
unsigned long time_update_interval = 12*3600*1000; //2 times a day
const char* ntpServer = "pool.ntp.org";
const long gmtOffset_sec = 32400;
const int daylightOffset_sec = 0;
String alkMonitorState = "off";

unsigned long currentTime = millis();
unsigned long previousTime = 0;
const long timeoutTime = 2000;
String header;
String display_volume = "";


WiFiServer server(80);
IPAddress local_IP(192, 168, 0, 154);
IPAddress gateway(192, 168, 0, 1);
IPAddress subnet(255, 255, 255, 0);
IPAddress primaryDNS(61, 41, 153, 2); //optional
IPAddress secondaryDNS(1, 214, 68, 2); //optional

[HASH=70522]#define[/HASH] GMAIL_SMTP_SEVER "smtp.gmail.com"
[HASH=70522]#define[/HASH] GMAIL_SMTP_USERNAME "[email protected]"
[HASH=70522]#define[/HASH] GMAIL_SMTP_PASSWORD "xxxxxx"
[HASH=70522]#define[/HASH] GMAIL_SMTP_PORT 465



Thank you for your detailed reply.

I seem to have no problem using the main board and power supply for the 3d printer.

Let me ask you one more question.

The test is completed and the result value should come by e-mail, but it is not coming.

Is it a connection problem between mega2560 and esp32?

However, the date data seems to be delivered just fine.

 

[Borat]

[HASH=42478]#include[/HASH] <WiFi.h>
[HASH=42478]#include[/HASH] <Wire.h>
[HASH=42478]#include[/HASH] <WebServer.h>
[HASH=70522]#define[/HASH] WIRE_SLAVE_ADDRESS 9
[HASH=42478]#include[/HASH] "time.h"
[HASH=42478]#include[/HASH] <Arduino.h>
[HASH=42478]#include[/HASH] <ESP32_MailClient.h>
// Replace with your network credentials
const char* ssid = "chengyu-xiaomi";
const char* password = "xxxxx";
unsigned long last_update_time = 0;
unsigned long current_time;
unsigned long startup_time;
unsigned long time_update_interval = 12*3600*1000; //2 times a day
const char* ntpServer = "pool.ntp.org";
const long gmtOffset_sec = 32400;
const int daylightOffset_sec = 0;
String alkMonitorState = "off";

unsigned long currentTime = millis();
unsigned long previousTime = 0;
const long timeoutTime = 2000;
String header;
String display_volume = "";


WiFiServer server(80);
IPAddress local_IP(192, 168, 0, 154);
IPAddress gateway(192, 168, 0, 1);
IPAddress subnet(255, 255, 255, 0);
IPAddress primaryDNS(61, 41, 153, 2); //optional
IPAddress secondaryDNS(1, 214, 68, 2); //optional

[HASH=70522]#define[/HASH] GMAIL_SMTP_SEVER "smtp.gmail.com"
[HASH=70522]#define[/HASH] GMAIL_SMTP_USERNAME "[email protected]"
[HASH=70522]#define[/HASH] GMAIL_SMTP_PASSWORD "xxxxxx"
[HASH=70522]#define[/HASH] GMAIL_SMTP_PORT 465



Thank you for your detailed reply.

I seem to have no problem using the main board and power supply for the 3d printer.

Let me ask you one more question.

The test is completed and the result value should come by e-mail, but it is not coming.

Is it a connection problem between mega2560 and esp32?

However, the date data seems to be delivered just fine.

When you send emails via gmail from an application, you need to create an app password, this is described here:

Sign in using app passwords - Gmail Help

An app password is a 16-digit passcode that gives a non-Google app or device permission to access your Google Account. App passwords can only be used with accounts that have 2-Step Verification turned

support.google.com

You then use that password (not your normail gmail password) to send emails.

Have you done that yet?

Borat.

 

[cliffE]

I am new to coding. I tried to upload the sketch onto my arduino mini but I continue to get the message "Compilation error: MemoryInfo.h: No such file or directory". When codes note "#include", where are these files coming from?

 

[cliffE]

Figured it out. Finished the code install but it notes my file is too big. Trying to upload on the arduino mega pro min. I read I can remove "float" from the sketch where decimals are not needed. Other thoughts. Should I try a Arduino mega, which would mean changing up the wiring scheme.

 

[Borat]

Figured it out. Finished the code install but it notes my file is too big. Trying to upload on the arduino mega pro min. I read I can remove "float" from the sketch where decimals are not needed. Other thoughts. Should I try a Arduino mega, which would mean changing up the wiring scheme.

Great that you did sort this out..

For wider audience - at some point I was experimenting with a library that I downloaded from GitHub - it allows you to query memory availability. The code does not use that library now (I think) , so it should be safe to simply comment it out.

 

[Borat]

Figured it out. Finished the code install but it notes my file is too big. Trying to upload on the arduino mega pro min. I read I can remove "float" from the sketch where decimals are not needed. Other thoughts. Should I try a Arduino mega, which would mean changing up the wiring scheme.

Have you made changes to the code? It should not be large for Mega, Mega mini 2560 amd Mega 2560 is exactly the same board, just the arrangement of pins is more compact.

 

[cliffE]

Have you made changes to the code? It should not be large for Mega, Mega mini 2560 amd Mega 2560 is exactly the same board, just the arrangement of pins is more compact.

Selected the wrong board. The mega 2560 and the mega 2560 mini got me confused.
Good to go now!

 

[bread1973]

When you send emails via gmail from an application, you need to create an app password, this is described here:

Sign in using app passwords - Gmail Help

An app password is a 16-digit passcode that gives a non-Google app or device permission to access your Google Account. App passwords can only be used with accounts that have 2-Step Verification turned

support.google.com

You then use that password (not your normail gmail password) to send emails.

Have you done that yet?

Borat.

Yes, I will try to fix it like that. thank you ^^

 

[BassamKassem]

Hello @Borat . Here is the final enclosure hope you like it

I can't thank you enough for your contributions help and support

 

[cliffE]

Hello @Borat . Here is the final enclosure hope you like it

I can't thank you enough for your contributions help and support
View attachment 3120486 View attachment 3120487 View attachment 3120488 View attachment 3120490 View attachment 3120491 View attachment 3120492 View attachment 3120493 View attachment 3120494 View attachment 3120495 View attachment 3120497 View attachment 3120498 View attachment 3120500 View attachment 3120501 View attachment 3120502 View attachment 3120505

So cool

 

[BassamKassem]

So cool

Thanks

 

[Borat]

Hello @Borat . Here is the final enclosure hope you like it

I can't thank you enough for your contributions help and support
View attachment 3120486 View attachment 3120487 View attachment 3120488 View attachment 3120490 View attachment 3120491 View attachment 3120492 View attachment 3120493 View attachment 3120494 View attachment 3120495 View attachment 3120497 View attachment 3120498 View attachment 3120500 View attachment 3120501 View attachment 3120502 View attachment 3120505

Congratulations! This is absolutely stunning!

 

[Borat]

The one thing I would recommend thinking about is the acid concentration you use. I am currently using 0.1N hydrochloric acid, however I am thinking of potentially diluting it further to perhaps 0.05N.

The weaker the acid - the more precise your DKH calculation will be (just because the dosing amount is more accurate for larger volume). Your DKH calculation formula is as follows:

DKH= acid_vol/sample_vol*2800*ACID_CONCENTRATION (here ACID_CONCENTRATION = 0.1 as it currently used)

Generally the dilution formula works as follows. Let N1 and V1 be concentration and volume of solution before dilution and let N1 and V2 be concentration and volume of solution after dilution.

Then the following will hold : V1*N1 = V2*N2

.. from this we can calculated V2 =V1*N1/N2 and thus the amount of RO water you need to add to your N1 concentration to get N2 concentration is equal to V_RO = V2-V1 = V1*N1/N2-V1 = V1(N1/N2-1)

For example, you are diluting from strength 0.1N to 0.05N: take 1 litre of 0.1N solution (V1=1) add the amount of RO water equal to:

V_RO = 1*(0.1/0.05-1) = 1 LITRE

..and your DKH formula for 0.05N acid concentrration would be:

DKH = acid_vol/sample_vol*2800*0.05 =acid_vol/sample_vol*140

The only disadvantage of having very diluted acid is that your reagent container needs to be large (every test will use more reagent volume), otherwise you run out of reagent too quickly. Also bear in mind that your reaction chamber needs to be sizeable enough for both test volume and acid volume. Mine is approximately 150ml, so I have approx. 50ML spare size for acid (which is plenty - and would roughly work for acid concentration down to 0.01N). You can always reduce the sample size (from currently assumed 100ml) to allow for more accid to be added.

Good luck to everyone to try this marvelously simple technology for which you don't need to pay extraordinary amounts of money.

Borat.

 

[BassamKassem]

Congratulations! This is absolutely stunning!

Thank you so much

 

[Gogo007]

Hello @Borat . Here is the final enclosure hope you like it

I can't thank you enough for your contributions help and support
View attachment 3120486 View attachment 3120487 View attachment 3120488 View attachment 3120490 View attachment 3120491 View attachment 3120492 View attachment 3120493 View attachment 3120494 View attachment 3120495 View attachment 3120497 View attachment 3120498 View attachment 3120500 View attachment 3120501 View attachment 3120502 View attachment 3120505

Congratulations you have made a stunning work very cool

 

[Gogo007]

The one thing I would recommend thinking about is the acid concentration you use. I am currently using 0.1N hydrochloric acid, however I am thinking of potentially diluting it further to perhaps 0.05N.

The weaker the acid - the more precise your DKH calculation will be (just because the dosing amount is more accurate for larger volume). Your DKH calculation formula is as follows:

DKH= acid_vol/sample_vol*2800*ACID_CONCENTRATION (here ACID_CONCENTRATION = 0.1 as it currently used)

Generally the dilution formula works as follows. Let N1 and V1 be concentration and volume of solution before dilution and let N1 and V2 be concentration and volume of solution after dilution.

Then the following will hold : V1*N1 = V2*N2

.. from this we can calculated V2 =V1*N1/N2 and thus the amount of RO water you need to add to your N1 concentration to get N2 concentration is equal to V_RO = V2-V1 = V1*N1/N2-V1 = V1(N1/N2-1)

For example, you are diluting from strength 0.1N to 0.05N: take 1 litre of 0.1N solution (V1=1) add the amount of RO water equal to:

V_RO = 1*(0.1/0.05-1) = 1 LITRE

..and your DKH formula for 0.05N acid concentrration would be:

DKH = acid_vol/sample_vol*2800*0.05 =acid_vol/sample_vol*140

The only disadvantage of having very diluted acid is that your reagent container needs to be large (every test will use more reagent volume), otherwise you run out of reagent too quickly. Also bear in mind that your reaction chamber needs to be sizeable enough for both test volume and acid volume. Mine is approximately 150ml, so I have approx. 50ML spare size for acid (which is plenty - and would roughly work for acid concentration down to 0.01N). You can always reduce the sample size (from currently assumed 100ml) to allow for more accid to be added.

Good luck to everyone to try this marvelously simple technology for which you don't need to pay extraordinary amounts of money.

Borat.

you are right Mr borate i am using 0.025 this is not that much dilute and make a good accuracy @0.1DKH which will be
0.128 ml of the acid to volume of 100ml of sample the 0.128 could be handled accurately through the steeper pump with 2*4mm tubes .. the accuracy now only depends on how accurate and linear is the ph module and ADC of the microcontroller is .. which is fare is very good the normal usage of acid is about 11.5ml to KH of 9DKH at 0.025N acid and sample of 100ml i found that is good for me so normally with 3 tests per day gonna be 34.5ml daily usage and 1.035Liter per month so drum of 2liter will hold me for 2month

 

[cliffE]

What goes here on my PCB board?