Hello everyone!
I've searched for the answer for a long time but I just can't find one understandable enough for a beginner like myself...
I have a NodeMCU v3:
I also have this Micro SD Adapter:
Could someone please explain to me the mapping between them?
SD.begin(X);
Aand also what do I write instead of X to make it begin?
Thank you very much for your time!
You haven't been looking hard enough
Interfacing sdcard with NodeMcu/ESP8266 - YouTube and there are others
I believe the only complication is in how you power Node MCU, as I believe the Catalex is a 5v module.
I guess powering is my problem then. Because I can't initialize SD card with this example too :c
Do you know how could I solve it?
Also, doesn't VIN pin give 5V?
VIN is just a pin above the regulator. IF you are feeding the regulator 5v, e.g. using a USB cable, then yes, that 5v is available at VIN. I have the same SD module but I have never used it. I understand it is 5v only and has an onboard 3.3v regulator. I assume the above arrangement is what is used in the video. Bearing in mind that ESP8266 is strictly a 3.3v device, if you are feeding it 3.3v by other means, don't expect 5v at VIN.
If your power is in fact kosher, I guess the next point is to ensure that the CS pin used really is the one called for in the code. It is typically pin 4 in Arduino and I believe that is D2 on NodeMCU.
Thanks guys, I figured many things out but I still can't make it work :c
I followed this to find what to plug where:
I got:
NodeMCU -> MicroSd Adapter
SCK -> GPIO14 (D5)
MISO -> GPIO12 (D6)
MOSI -> GPIO13 (D7)
CS -> GPIO15 (D8)
VCC -> VU (USB power output - 5V?)
GND -> GND
I don't have Voltmeter but when I plugged VU into the diode, it lighted like crazy. So I guess, 5V?
I also added this to my code:
const int chipSelect = 15;
Still, it just doesn't work.. What else might be the problem?
