HC-06 bluetooth module

Model: HC-06.
INFO:
The HC-06 bluetooth module allows us to connect our projects with Arduino to a smartphone, cell phone or PC wirelessly (Android), with the ease of operation of a serial port. The transmission is done completely transparently to the programmer, so it is connected directly to the serial pins of our preferred microcontroller (respecting the voltage levels, since the module is powered by 3.3V). All module parameters can be set by AT commands. The board also includes a 3.3V regulator, which allows the module to be powered with a voltage between 3.6V - 6V. This module is the ideal complement for our robotics, home automation and remote control projects with Arduino, PIC, Raspberry PI, ESP8266, ESP32, STM32, etc.

Bluetooth communication occurs between two types of devices: a master and a slave. If our goal is to connect our project to an Android smartphone, we can use either an HC-06 module or an HC-05 configured as a slave. The HC-06 bluetooth module is factory configured to work as a slave, that is, prepared to listen for connection requests. On the other hand, if our objective is to connect two projects, we will need to use an HC-05 module configured as master and an HC-06 (slave).

This module complies with the specifications of the bluetooth 2.0 standard that is perfectly compatible with Android cell phones or smartphones, but not with iPhones.

Technical specifications:
Operating voltage: 3.3V - 5VDC
Operating current: < 40mA
Sleep mode current: < 1mA
Chip: BC417143
Bluetooth: V2.0+EDR
Frequency: 2.4 GHz ISM band
Modulation: GFSK (Gaussian Frequency Shift Keying)
Emission power: 4 dBm, class 2
Sensitivity: -84dBm at 0.1% VIEW
Range 10 meters
Communication interface: Serial UART TTL
Transmission speed: 1200bps up to 1.3Mbps
Default baudrate: 9600,8,1,n.
Asynchronous speed: 2.1Mbps (max) / 160kbps.
Synchronous speed: 1Mbps/1Mbps
Security: Authentication and encryption
Android-compatible
Dimensions: 37*16mm
Weight: 3.2 grams
The Bluetooth standard is based on a master/slave operational mode.

Slave: works only as a communication slave, that is, it waits for the master to give it an order.
Host: works only as host (master) of the communication, that is, it chooses which slave to communicate with.
Host/Slave: it can work as both, it is configurable through AT commands.
The HC-06 bluetooth module is factory configured to work as a slave.