The wire size is not a problem. (I use 28 or 30 awg wire on perfboards) Recheck your wiring, layout and look for solder bridges.quick question
I am soldering a perfboard to do SPI and when I tried my programs (that wored well before on a breadboard) they fail. The slave transmits garbage, 0x00 or other meaningless chars.
I ve checked the connections, they seemed to be fine. The only thing I can thing of is that when I did it on the breadboard I used jumper wires (and it went well)
Now I am using the following (pardon the ugliness, I am not good at doing this)
View attachment 90581
are these thin wires not good for SPI communication? Should I use jumper wires instead? width 20 perhaps?
Any advice very much appreciated