Grove Blueseeed - Bluetooth 4.0 (BLE) module with HM-11

WiFi/BLE module that supports both the 2.4 GHz and 5 GHz WiFi bands, as well as Bluetooth Low Energy (BLE 4.2) communication. It has a built-in chip antenna and 2.54 mm pitch connectors, which greatly facilitate prototyping. Tibbo WA2000C

Miniature antenna for 2.4GHz band, RoHS

Diagnostic interface for wireless diagnostics of cars with OBD2 system. The device uses the popular 16-pin connector and is equipped with a Bluetooth 3.0 module. Vgate iCar2 BT3.0 Orange

Bluetooth module with built-in CC2541 chip. The module is small, energy-saving and easy to use

The evaluation kit designed for the nRF51822 Bluetooth 4.0 system consists of the BLE400 base board and the Core51822 wireless module with the nRF51822 chip. Waveshare NRF51822 Eval Kit

Bluetooth audio receiver module enclosed in a housing that enables wireless transmission of sounds. It is equipped with a PCB antenna and a 3.5 mm audio jack

Compact, low-power 2.4 GHz Bluetooth Beacon solution, ideal for sensor monitoring, asset tracking, and real-time location. With extremely low power consumption, it can operate for years on a 3V button cell battery, making it an efficient choice for IoT applications. Configuration of the module is simple and intuitive thanks to the InPlay NanoBeacon Config Tool, which enables easy programming without the need to write code, providing a user-friendly graphical interface to set the device parameters. SparkFun WRL-21293

The BLE 4.0 Bluetooth module with CC2540 allows for transmission in both Slave and Master modes. It has an integrated PCB antenna and an extensive security system. modCC2540

Mini bluetooth v2.0, plug & play USB module, RoHS

Board with the Artemis chip, the GNSS ZOE-M8Q module and the Iridium 9603N satellite receiver. It allows you to send and receive short messages with data anywhere in the world. SparkFun WRL-18712

The module with the HC-05 compatible transceiver makes it easy to add Bluetooth communication to an existing project. The system is controlled by exchanging AT commands (UART bus)

WRL-12991

The Microchip RN4020 module is an energy-saving Bluetooth v4.1 module with a built-in antenna; transmit power level + 7dBm, AES128 coding

BLE Beacon, which emits Bluetooth Low Energy signals, enabling discovery by Bluetooth devices such as smartphones or ESP32 without the need for pairing. With a built-in I2C interface and an 11-bit ADC, it allows data collection from various sensors, and its low power consumption (650nA in sleep mode) ensures long-lasting operation on a single battery, ideal for applications requiring mobility and long range. DFRobot TEL0168

Integrated circuit, combining Wi-Fi functionality and Bluetooth 4.2 BLE. Integrated 32-bit dual-core Xtensa LX6 processor, 448kB ROM, 520kB SRAM. ESP32 allows you to work with many interfaces, including SPI, I2C, UART, CAN, ETH, IR and can be supplied with 2.2V-3.6V. The system has a QFN48 (5x5mm) housing. ESP32-D0WD