Restart after 7 s

[Jerby13]

Hi Armin,

Great project, so I started to build the tester myself. But unfortunately I'm having problems to get it working properly. From first build I'm getting strange behaviour and ended up with I think wrong data in the EEPROM which now results in restarts after the first init and no matter what I write into the EEPROM it keeps restarting.

Some questions:
Could you add a software definition to enable/disable the reading/writing to EEPROM?
What versions of the libraries that are not included in Github do you use?
What data should be written to EEPROM in initial state, 0xFF?
I tested the software with nano and promini 5v/16Mhz.

I hope that you can get me on the way,
Regards,
Jerby

[Jerby13]

I get the following monitor output:

START D:\Downloads\Ultimate-Battery-Tester-master\UltimateBatteryTester\UltimateBatteryTester.ino
Version 3.2 from Nov 20 2023
Button pin=2
Connect pin 10 to ground, to suppress such prints not suited for Arduino plotter
674 compressed EEPROM ������:�6�
0 0 0
EEPROM values=0x0 0x0 0x0
65506 65506 6550������45�6�6 65476
EEPROM values=0x0 0x0 0x0
65446 65446 654������56�5�16 65416
EEPROM values=0x0 0x0 0x0
65386 65386 65������67���356 65356
EEPROM values=0x0 0x0 0x0
65326 65326 6������78�6�5296 65296

....

45494 45436 45436
EEPROM values=0x0 0x0 0x0
������89�4�5406
45434 45376 45376
EEPROM values=0x0 0x0 0x0�������67�6�45346
Voltage=0.000V->45.374V:45374 Current=0mA->��������K�����ESR=0.000ohm->45.316ohm:45316 LoadResistor=0.000ohm���������4�c84mAh Duration=11h_14min
Stored minu���!����K��START D:\Downloads\Ultimate-Battery-Tester-master\UltimateBatteryTester\UltimateBatteryTester.ino
Version 3.2 from Nov 20 2023
Button pin=2
Connect pin 10 to ground, to suppress such prints not suited for Arduino plotter
674 compressed EEPRO������56�7�d
0 0 0
EEPROM values=0x0 0x0 0x0
65506 65506 65������67���476 65476
EEPROM values=0x0 0x0 0x0
65446 65446 6���4��78�6�5416 65416

[ArminJo]

Non initialized EEPROM is always 0xFF.
Is your supply voltage OK because the Serial output of Serial.println(F("compressed EEPROM values found")); is partially missing.
You can try to comment out the line 443 readAndProcessEEPROMData(false);

[Jerby13]

I changed the I2C LCD with a simple parallel version and the restarts are over!

[ArminJo]

Thanks for reporting, my home version is a parallel LCD.
I will check it with a I2C version.

[Jerby13]

I also switched to Arduino IDE today and before I used Platform IO and had instability issues with parallel and I2C.

[Jerby13]

Found the root cause of the instability issues, the button interrupt pin 2. If a wire is connected to pin 2 all kind of issues occur. As far as I can see internal pull-up is enabled at pin 2 or not? I'll test it with external pull-up.

[ArminJo]

Thanks,
You must disable the line #define BUTTON_IS_ACTIVE_HIGH if you use a button connecting to ground.

[Jerby13]

Oeps, incredible that I didn't see that clear comment in your code. It explains all the weird responses.
Please make a note on the schematic that the default setting in the code is active high.
Thanks for your very quick respons, it now is working great.

[ArminJo]

I changed the default settings to low, because of your feedback 😀 .