BLE 4.0 UART Bluetooth Low Energy Module without Adapter

This module has three modes (control, music and bluetooth). The audio files can be saved on the U disk and on the TF card.
Its remote control allows you to control the audio output (volume down or up, music change, mode change). Bluetooth Decoder Module Amplifier Audio Receiver USB TF features:
- Interfaces:
       - 5V micro USB supply
       - USB audio
       - U disk
       - LED
       - TF card
       - IR remote
       - AD key interface to connect external circuits
       - Bluetooth decoder
       - 3.5mm stereo output
       - Left and right 3W channels handling speaker
       - 2 3W amplifiers
- Supply voltage: 3.7-5VDC
- Signal / noise ratio (SNR): 90 dB

The Bluetooth HC-06 module is one of the best options for projects where you need wireless communications. Arduino Wireless Module HC-06 HC06 features:
- CSR BC417 Chipset
- Power: 3.3V
- Bluetooth version V2.0 + EDR
- Frequency: 2.4GHz band ISM
- Modulation: GFSK
- Range approx. 10m
- Security: Authentication and encryption.
- Speed- & gt; Asynchronous: 2.1Mbps (Max) / 160 kbps; Synchronous: 1Mbps / 1Mbps
- Supports AT commands for configuration through a serial port
- Working temperature: -20 ºC to +75 ºC - Working current - pairing: 80 mA
- Transmission: 8mA
- Size: 28 x 12mm

SparkFun IoT RedBoard development board compatible with Arduino. It incorporates an ESP32 chip with a 32-bit dual-core Xtensa LX6 microprocessor with a clock frequency of up to 240 MHz. It enables WiFi and Bluetooth wireless communication, making it versatile for Smart Home and IoT projects.

XM-15B Bluetooth Serial Port Module Master Slave Compatible Arduino HC-05/06 features:
* Power 3.0V -6V
* 3.3V / 5V logic levels
* Bluetooth version V2.1 + EDR
* Frequency: 2.4GHz ISM band
* Reach approx. 30m
* Security: Authentication and encryption
* Supports AT commands for configuration through a serial port
* Working temperature: -20 ºC to +75 ºC
* Working current - 50 mA
* PCB dimension: 35 x 19m -Using the conventional Bluetooth CSR chip, the protocol standard Bluetooth V2.1 + EDR, passes the Bluetooth BQB certification
-Fast start, only 0.3 seconds to complete the initialization of the complete module (including the Bluetooth protocol stack)
- Built-in hardware protector, never hangs

 Master Slave Bluetooth Modul for Arduino iOS Android. The HM10 supports Bluetooth 4.0 (low energy) and therefore has a relatively low power consumption.

HC-06 Bluetooth transceiver module with base.
The bluetooth module HC-06 is one of the best options for projects, in which you need wireless communications.
The transceiver module allows bluetooth wireless connections as a slave, ready to listen for connection requests.
Bluetooth Transceiver Module HC-06 Wireless features:
- Chipset CSR BC417
- 3.5V - 5V power
- Bluetooth version V2.0 + EDR
- Frequency: 2.4GHz ISM band
- Modulation: GFSK
- Reach approx. 10m
- Security: Authentication and encryption.
- Speed-> Asynchronous: 2.1Mbps (Max) / 160 kbps; Synchronous: 1Mbps / 1Mbps
- Supports AT commands for configuration through a serial port
- Working temperature: -20ºC to + 75ºC
- Working current - pairing: 80 mA

- HC-05 Bluetooth transceiver module with base
- The bluetooth module HC-05 is one of the best options for projects where you need wireless communications.
- The transceiver module (transmission / reception) allows bluetooth wireless connections like master or slave, works in a transparent way as if we made a RS-232 TTL serial connection with cable.
Bluetooth Transceiver Module HC-05 Wireless features:
- Chipset CSR BC417
- 3.6 to 6 Vdc power supply
- Bluetooth version V2.0 + EDR
- Frequency: 2.4GHz ISM band
- Modulation: GFSK
- Reach approx. 10m
- Security: Authentication and encryption.
- Speed-> Asynchronous: 2.1Mbps (Max) / 160 kbps; Synchronous: 1Mbps / 1Mbps

The new SensorTag IoT kit invites you to realize your product idea connected to the cloud.
The new SensorTag now includes 10 low-power MEMS sensors in a small red package.
And it's expandable with DevPacks to make it easy to add your own sensors or actuators.
Connect to the cloud with low-power Bluetooth and Get your sensor data online in 3 minutes.
The SensorTag is ready to go right away with an iOS and Android app, no programming experience to get started.
The new SensorTag is based on The CC2650 Wireless MCU, which offers 75% less power consumption than previous Bluetooth low energy products.
This allows the SensorTag to run on batteries, and offers years of battery life with a single coin cell battery.

- Bluetooth 4.0 AT-09 BLE Master / Slave module with 6-pin connection base
- This module is very similar to HM-10 module
- Bluetooth protocol: Bluetooth V4.0 BLE specification
- Ultra-low power consumption, in 90uA standby mode
Wireless Module AT-09 Bluetooth 4.0 CC2541 IOS BLE features:

- Chipset based on CC2541
- Bluetooth Class 2
- Industrial level Bluetooth module SPP
- Flash 256Kb
- Integrated chip antenna
- Power supply: + 3.3 VDC 50 mA
- Working temperature: -5 C to + 60 C
- Operating frequency: 2.4 GHz ISM Band
- Modulation method: GFSK (Gaussian Frequency Shift keying)

 Master Slave Bluetooth Modul for Arduino iOS Android. The HM10 supports Bluetooth 4.0 (low energy) and therefore has a relatively low power consumption.