UNO limitations

Projects General Guidance
1

Hey guys. I'm very new here so apologies if i'm in the wrong section....However i would like to ask.

The modules connected to UNO are

Buzzer+led
MQ2 sensor
DHT 11 sensor
SD logger
i2C display

Apparently, I can get it to work individually with SD logger attached however when i combine the sensors together, it all goes haywire and wont record the data. Could you guys check it out for me? I attach my .ino below.

PS, i remove the screen and the led+buzzer thinking it was taking too much power but still same issue persist.

THE_COMPLETO.ino (2.72 KB)

2

If you post your code as described in the how to use this forum sticky, more members will read it.

Also, post schematic in CAD or a picture of a hand drawn circuit in jpg or png- (not a pretty Fritzing drawing- PLEASE),

3

Go and read the forum instructions so that you can go back and modify your original post (not re-post it - using the "More -> Modify" option below the right hand corner of your post - to cite your code as such using the "</>" icon in the posting window.

The Nano is more convenient for real world projects. :astonished: