Troubleshooting WiFiNina Commands

Official Hardware Classic UNO WiFi Rev2
1

Hello everyone,

I'm trying to understand how the Arduino's WiFiNINA Library works.

I was working with the ESP-WROOM-02 that uses the ESP8266 module and know that it works through AT Commands, like "AT", "AT+RST" and so on. Also, the Nina w132 works with AT Commands too, as we can see here in the documentation provided by u-blox.

When I checked the Arduino's WiFiNINA Library I found in the wifi_spi.h uses an enum (short example below).

My question is, how does it work without using AT Commands?

enum {
... some lines omited here ...
	GET_CONN_STATUS_CMD	= 0x20,
	GET_IPADDR_CMD		= 0x21,
	GET_MACADDR_CMD		= 0x22,
	GET_CURR_SSID_CMD	= 0x23,
	GET_CURR_BSSID_CMD	= 0x24,
	GET_CURR_RSSI_CMD	= 0x25,
	GET_CURR_ENCT_CMD	= 0x26,
... some lines omited here ...
}

Example of usage:

void SpiDrv::sendCmd(uint8_t cmd, uint8_t numParam)
{
    // Send Spi START CMD
    spiTransfer(START_CMD);

    // Send Spi C + cmd
    spiTransfer(cmd & ~(REPLY_FLAG));

    // Send Spi totLen
    //spiTransfer(totLen);

    // Send Spi numParam
    spiTransfer(numParam);

    // If numParam == 0 send END CMD
    if (numParam == 0)
        spiTransfer(END_CMD);

}