Juraj
Member
the esp32 is updated only over Serrial0 pins. so RX/TX connection is required. io 0 LOW at boot signals to bootloader the it should wait for upload. the board has pull-up on io 0 for normal boot to application (sketch).
the WiFiNINA libray communicates with nina firmware over SPI and 3 other pins (io 0 as heartbeat, ready pin and WiFi/BLE selection pin). Arduino doesn't make a shield for WiFiNINA. they only make boards with NINA on board and plenty of unused pins on the main MCU and NINA to make all these connections.
the WiFiNINA libray communicates with nina firmware over SPI and 3 other pins (io 0 as heartbeat, ready pin and WiFi/BLE selection pin). Arduino doesn't make a shield for WiFiNINA. they only make boards with NINA on board and plenty of unused pins on the main MCU and NINA to make all these connections.