WiFI Kit 32 V3 pinout question

#1

hi
for V2 all the data is clearly described in the documentation. This I miss from V3
Can anybody tell me on which PINS I can find these functions

static const uint8_t SS = 5;
static const uint8_t MOSI = 23;
static const uint8_t MISO = 19;
static const uint8_t SCK = 18;

Thanks

#2

This might help: Heltec LoRa 32 V3 nightmares

#3

OLED & LoRa ate attached to the following pins, hoever you can “.begin()” SPI & I2C with any pins you want as long as they support R/W…however if you wantto talk to the above modules you must stick to the followi g

static const uint8_t SDA_OLED = 17;
static const uint8_t SCL_OLED = 18;
static const uint8_t RST_OLED = 21;

static const int8_t SW_LoRa = -1;
static const uint8_t SS_LoRa = 8;
static const uint8_t SCK_LoRa = 9;
static const uint8_t MOSI_LoRa = 10;
static const uint8_t MISO_LoRa = 11;
static const uint8_t RST_LoRa = 12;
static const uint8_t BUSY_LoRa = 13;
static const uint8_t DIO1_LoRa = 14;

#4

@macedo123 @seekers
This part of pins does not conform to the actual situation and has been corrected.

#5

I see that the WiFi LoRa 32 V3 pins_arduino.h file has been updated [on GitHub], but presumably similar changes need to be made to the pins_arduino.h files for the other V3 modules too (I can’t see any pins file for the Wireless Stick Lite V3 module).

#6

I have a similar challenge:

With my ESP32 V2 boards I use the second SPI connection to write data to a SD card. I use the following pins on V2 boards:

SD_CS – GPIO22
SD_MOSI – GPIO23
SD_SCK – GPIO17
SD_MISO – GPIO13

Which GPIO pins are recommended on the ESP32 V3 board?

#7

exactly which physical pin on the board are assigned to SPI bus?
as well on the “pin out diagram” there are GPIO beyond 40 which are not described at all …

#8

I have submitted this to the maintenance personnel and will update it later. At present, Wireless Stick Lite V3 and WIFI LORA32 V3 use the same pin configuration.

#9

@klauswifikit8
SPI pins can be mapped at will, as long as they are unused.

#10

got it !
I changed the mapping of SPI like:

static const uint8_t SS    = 4;  // 5
static const uint8_t MOSI  = 5;  // 23
static const uint8_t MISO  = 6;  // 19
static const uint8_t SCK   = 7;  // 18

in

C:\Users<name>\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.6\variants\heltec_wifi_kit_32_v3\pins_arduino.h

These PINs are accessable on the board with its number

following the PIN assignment :

https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/api-reference/peripherals/gpio.html

Wifi Kit 32 V3 SPI Pinout / MicroSD Card Adapter Issues
#11

Not every pin combination works. After a lot of tests, I found a combination that actually works:

SD_CS – GPIO26
SD_MOSI – GPIO21
SD_CLK – GPIO20
SD_MISO – GPIO19

1 Like
#12

I tried this combination on a “WiFi LoRa 32 V3” using the SD_Test sketch with the change of :

#define SD_CS 26           // GPIO26       
#define SD_MOSI 21         // GPIO21
#define SD_SCLK 20         // GPIO20
#define SD_MISO 19         // GPIO19

SPIClass sd_spi(HSPI);

void setup(){

    Serial.begin(115200);

    sd_spi.begin(SD_SCLK, SD_MISO, SD_MOSI, SD_CS);

    if (!SD.begin(SD_CS, sd_spi)) {
        Serial.println("Card Mount Failed, SPI Connection faulty");
        return;
    }
.
.
.

And I was not able to get the SD Card operation functional.

I don’t think at this point it matters but I also tried formatting an 8GB SD with a Fat16 Partition, but I think this is an initialization issue.

I’m also using the same MicroSD Card module as this post :

I’ll keep at it, but if I get a series of pins that work, I’ll post back, just to post a resolution.

Thanks