Sanpyl ESP32-CAM ESP32 5V WiFi Bluetooth Development Board + OV2640 Camera Module for IoT Applications, Suitable for… Price: $19,49 (as of 23/10/2021 10:58 PST- Details)

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Using a on-board antenna, the module developed based on the ESP32 chip can work independently as a minimum system.
(BLE Beacom), with two high-performance 32-bit LX6 CPUs, a 7-stage pipeline architecture with a frequency range of 80MHz to 240MHz.