Best Bluetooth Modules for DIY Audio & IoT (Mini, USB, BLE 5.1/5.2) + Specs & Range

I compared a bunch of mini Bluetooth modules (BLE 4.2/5.1/5.2, some with SPP) for real builds—USB dongles, Bluetooth speaker/audio boards, and IoT sensors. Here’s what stood out: range, TX power, sensitivity, voltage, UART/SPI/I2C, size, and which module fits your project.

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Last updated: 2026/08/31

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ESP32 Development Board

ESP32 Development Board CH340 CP2102 WiFi Bluetooth Module ESP32-S Programming Clip ESP-32 development board with CH340 and CP2102 version. Built-in WiFi + Bluetooth dual mode. Comes with ESP32-S programming clip. Ideal for IoT projects, Arduino programming and maker electronics development.

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