IoT Based Biometric Fingerprint Attendance System with NodeMCU

[@SreemukhiK]

Compilation error: control reaches end of non-void function [-Werror=return-type] iam getting this error when executing with IDE sketch
plz give any solution

[@shobhitkumawat]

I am also facing same issue

[@SreemukhiK]

@@shobhitkumawatwhat to do how to resolve

[@SreemukhiK]

Verifying error control reaches end of non void function sir near the 690 line and 919 line

[@jamielsumeracruz3520]

Hi Sir, is this gonna work if we put the code in to a web server and not on the localhost?

[@27yashlohar18]

Can i use R503 without any chnages in code ?

[@eluuxz]

r307 have 6 pins, but why you only use 4 pins (txd, rxd, gnd, 3v), is the touch pin not used?

[@JustDoElectronics]

Because is work on the UART that’s why i used only 4 wire plz read the UART Protocol

[@eluuxz]

@@JustDoElectronics thats way r307 can used in nodemcu?

[@JustDoElectronics]

@muh.khairuldiantasman9651 yes

[@mdhamza3636]

can you help my fingerprints not blinking

[@eluuxz]

@@mdhamza3636 tukar pin out rxd dan txd, kalau saya tidak salah ingat pokoknya 2 pin itu ada di pin D1 D2

[@neelgoti8994]

Thanks for give all details in website 😊

[@nhatphongtranle3394]

please can I see myphpadmin(mysql) of project ? I have problems with manager user when i add finger id 1 that's ok, but i add finger id 2 => alert (You can't add more than one ID each time) and can't add new finger id. thank you so much

[@JustDoElectronics]

Why you add more than 1 fingers

[@nhatphongtranle3394]

@@JustDoElectronics I did the same as in your video, after adding finger id1, I tried to add finger id2 but it didn't work

[@JustDoElectronics]

@nhatphongtranle3394 ok delete all fingers id fist then you upload new one is some time not get finger id don’t worry rest all finger id and do again 👍

[@nhatphongtranle3394]

@@JustDoElectronics How can I reset, in phpmyadmin or reset R307, can you tell me? Thank you

[@mdhamza3636]

​@@nhatphongtranle3394didi you solve the issue

[@MandlaDzvuke]

Verifying error control reaches end of non void function sir

[@JustDoElectronics]

Send me photos

[@MandlaDzvuke]

@@JustDoElectronics can i have your email or contact my RUclips isn't not responding

[@N88-y1j]

Same problem

[@tsiafietsteve7974]

hello

[@JustinPiquero-f8u]

Hi what I need to do if error for compiling board nodemcu

[@naveenk4792]

Can i use esp32 in this code?

[@OmurFaruk-p4c]

hello sir, this time i upload code
arduino getting the error: this error is : { Multiple libraries were found for "WiFiClient.h"
In file included from C:\Users\Home\Desktop\sketch_nov22a\sketch_nov22a.ino:8:
Used: C:\Users\Home\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\libraries\ESP8266WiFi
C:\Program Files (x86)\Arduino\libraries\Adafruit-GFX-Library-master/Adafruit_GFX.h:12:10: fatal error: Adafruit_I2CDevice.h: No such file or directory
Not used: C:\Program Files (x86)\Arduino\libraries\WiFi
12 | #include
| ^~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
exit status 1
Error compiling for board NodeMCU 1.0 (ESP-12E Module).
} }

[@anhthe7998]

Can I change r307 to as608?

[@JustDoElectronics]

Yes

[@khofifahayunovia1373]

is that nodeMCU ESP8266 ?

[@JustDoElectronics]

Yes

[@ulinnuhaluthfi6478]

Can you help me, my finger print doesn't detect (finger print not find)

[@JustDoElectronics]

ok

[@ulinnuhaluthfi6478]

@@JustDoElectronics do you have any solution?

[@JustDoElectronics]

Used examples code and check fingerprints sensor

[@wow8791]

did u solve

[@ulinnuhaluthfi6478]

@@wow8791 yes i solved it, it can be used hardware serial tx2 & rx2 or software serial (esp 8266 d5 d6)

[@mdhamza3636]

Bro my OLED display show lock sigh with fingerprint sign how ho solve this

[@tadiwamatewe]

Did you find solution?

[@mdhamza3636]

@@tadiwamatewe check connections

[@mdhamza3636]

@@tadiwamatewe check connection

[@HethikaPothum]

Sa me problem bro

[@mdhamza3636]

@@HethikaPothum check connection

[@syedalijaan1974]

Mere OLED me fingerprint lock show horaha hai

[@HethikaPothum]

Same problem

[@mdhamza3636]

can you help my fingerprints not blinking

[@abdulhakimlukwago88]

Mine blinks once and stops

[@nikolausmoattana]

SQL Error

[@JustDoElectronics]

Why check probably flow the article

[@SreemukhiK]

In function 'int deleteFingerprint(int)':
error: control reaches end of non-void function [-Werror=return-type]
690 | display.display();
| ~~~~~~~~~~~~~~~^~
In function 'uint8_t getFingerprintEnroll()':
error: control reaches end of non-void function [-Werror=return-type]
919 | confirmAdding();
| ~~~~~~~~~~~~~^~
cc1plus.exe: some warnings being treated as errors
Compilation error: control reaches end of non-void function [-Werror=return-type]
please give me any idea to resolve this issue

[@SreemukhiK]

Please help me to resolve

[@arnabkumarmondal2005]

C:\Users\hp\Documents\Arduino\16092024_1010PM\16092024_1010PM.ino: In function 'uint8_t deleteFingerprint(int)':
C:\Users\hp\Documents\Arduino\16092024_1010PM\16092024_1010PM.ino:688:20: error: control reaches end of non-void function [-Werror=return-type]
688 | display.display();
| ~~~~~~~~~~~~~~~^~
C:\Users\hp\Documents\Arduino\16092024_1010PM\16092024_1010PM.ino: In function 'uint8_t getFingerprintEnroll()':
C:\Users\hp\Documents\Arduino\16092024_1010PM\16092024_1010PM.ino:917:18: error: control reaches end of non-void function [-Werror=return-type]
917 | confirmAdding();
| ~~~~~~~~~~~~~^~
cc1plus.exe: some warnings being treated as errors
Multiple libraries were found for "SoftwareSerial.h"
Used: C:\Users\hp\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\libraries\SoftwareSerial
Not used: C:\Users\hp\Documents\Arduino\libraries\EspSoftwareSerial
exit status 1
Compilation error: control reaches end of non-void function [-Werror=return-type]

[@arnabkumarmondal2005]

Ai error ta ascha
Pls aktu bolben ki korte hobe

[@arnabkumarmondal2005]

Pls

[@izonetotm9839]

Please.link.update

[@JustDoElectronics]

Which one ??

[@JustinPiquero-f8u]

Hi what I need to do if error for compiling board nodemcu