{"title":"Adafruit AirLift Bitsy Add-On – ESP32 WiFi Co-Processor","handle":"adafruit-airlift-bitsy-add-on-esp32-wifi-co-processor","url":"/products/adafruit-airlift-bitsy-add-on-esp32-wifi-co-processor","description":"Give your ItsyBitsy project WiFi connectivity with the Adafruit AirLift Bitsy Add-On. This compact daughterboard uses an ESP32 as a WiFi co-processor, handling all the heavy lifting of network connections and TLS/SSL encryption so your main microcontroller can focus on your application logic.\n\nThe ESP32 communicates over 8 MHz SPI for high-speed data transfer, requiring just an SPI bus and 2 control pins. It comes pre-programmed with WiFi co-processor firmware (a variant of Arduino WiFiNINA) and has root certificates pre-burned in for secure HTTPS connections. A tri-state chip on MISO allows sharing the SPI bus with other devices.\n\nKey Features\n\n\nESP32 WiFi Co-Processor – Handles WiFi networking and TLS/SSL encryption\n\n8 MHz SPI Interface – High-speed communication with just SPI + 2 control pins\n\nPre-Programmed Firmware – Ready to use out of the box with Arduino and CircuitPython\n\nTLS/SSL Support – Root certificates pre-burned for secure connections\n\nShared SPI Bus – Tri-state MISO allows sharing with other SPI devices\n\nItsyBitsy Form Factor – Designed to stack directly on top of ItsyBitsy boards\n\n\nCompatibility\n\n\nArduino – Works with ItsyBitsy M0, M4 and similar 3V logic boards (recommended: M4 or higher for best results)\n\nCircuitPython – Requires ItsyBitsy M4 or equivalent SAMD51/Cortex M4 minimum\n\nNot compatible with ItsyBitsy 32u4 5V (wrong voltage level)\n\n\nAlso Available\n\n\nAirLift ESP32 WiFi Breakout – Universal breakout version for any microcontroller\n\n\nIdeal For\n\nAdding WiFi to ItsyBitsy projects\nIoT data logging and cloud connectivity\nWeb API integrations\nSecure HTTPS communication\n\n\nPackage Contents\n\n1× Adafruit AirLift Bitsy Add-On (assembled and tested)\n1× Header strip\n\n\n\nNote: ItsyBitsy board not included. Enterprise WiFi is not supported. Requires 3V logic — the 5V ItsyBitsy 32u4 is not compatible. Power supply must provide up to 250 mA during WiFi usage.\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":4976,"title":"Default Title","sku":"AF-4363","price":29.17,"on_sale":false,"in_stock":true,"available_quantity":83,"option1":"Default Title"}]}