Reviews Bluetooth Serial Module

WayinTop 20x4 2004 LCD Display Module with IIC/I2C/TWI Serial Interface Adapter (Yellow Green/2004)

【20x4 LCD Display】With this shield, you can display whatever you want by programming the for Arduino board. Therefore, this is a perfect choice to make your project more interesting and vivid! Totally display 20 characters in one row, 4 rows can display 80 characters..
【IIC Interface Adapter】No need to buy the adapter extra, this kit contains a IIC/I2C/TWI Serial Interface Adapter, with witch you can start your project at any time..
【Easy to Use】 Less I/O ports are occupied, only four - VCC, GND, SDA (serial data line), SCL (serial clock line). Address of the module: 0x27.
【Support IIC Interface】It only takes two I/O port thus saving more for other usages. You can adjust the contrast by the potentiometer at its back. If you don’t want the back light, you can also unplug the jumper cap at the LCD back..
【Widely Applications】LCD display module based on the popular controller, works great with for Arduino and other micro-controllers..

Specially researched and developed this motor driver breakout board to facilitate the micro bit to drive DC motor..
Four motor control modes: Forward/Reverse /Brake /Stop.Access to 3Pin headers connection..
Integrated with 3.3V and 5V voltage-regulator chip. Comes with a serial communication port for Bluetooth module..
EXCELLENT QUALITY: solder is very clean, everything is aligned nicely, all boards are well packed after function,voltage, current testing, protected in a beautiful box..
Up to FCC and CE Standard: made from environmentally friendly components and materials, as well as environmentally friendly production technology, it is really safe..

Original HM-18 module: DSD TECH brand guarantees and we accept refund without any excuse..
Bluetooth 5.0 BLE Module: The chipset is CC2640R2F from TI,Compared to the Bluetooth 4.0 module, this BLE module has a faster transfer rate and a larger MTU..
Compatible with HM-10, if you are using HM-10 now, you can quickly upgrade your board to Bluetooth 5.0 BLE..
Free APP: DSD TECH offers a free app that you can get this module into work in 5 minutes. Please search "DSD TECH Bluetooth" in Google Play App store..
DSD TECH back this HM-18 Bluetooth 5.0 BLE module with ONE Year WARRANTY and lifetime technical support. If you meet any question, please contact us, we will fix your issue within 24 hours.

The module is a low-power consumption character LCD Module with a built-in controller..
The module can be easily interfaced with a MCU..
Display Format: 20 Characters x 4 lines..
It is fantastic for Arduino based project..
Fully assembled and tested Serial LCD 20x4 Module..

Original HM-19 module, DSD TECH brand guarantees and we accept refund without any excuse..
Bluetooth 5.0 BLE Module: The main IC is CC2640R2F from TI,Compared to the Bluetooth 4.0 module, this module has a faster transfer rate and a larger MTU..
Fully compatible with HM-11,HM-17, if you are using HM-11 or HM-17 now, you can quickly upgrade your board to Bluetooth 5.0 BLE..
DSD TECH offers a free app that lets you quickly integrate this module into your project.Please search "DSD TECH Bluetooth" in Google Play and the Appstore..
DSD TECH back this HM-19 Bluetooth 5.0 BLE module with ONE Year WARRANTY and lifetime technical support. If you meet any question, please contact us, we will fix your issue within 24 hours.

Embedded TCP / UDP stack - allows you to upload data to a Web server | RTC supported | selectable serial port | Jac speakers and headphones.
Quad-Band 850/900/1800/1900 MHz - could work on GSM networks in all countries around the world, work with Uno Mega..
This is a new version (64M version), SMS support MMS: Multimedia message and Short Message Service - so it is possible to send small amounts of data over the network (ASCII or raw hexadecimal).
The shield allows you to get SMS, MMS, GPRS and audio via UART by sending AT commands (GSM 07.07, 07.05 and SIMCOM enhanced to commands). The shield also has the 12 GPIOs, 2 PWMs and an ADC of the SIM900 module (They are all 2V8 logic) present on board..
Application: M2M (Machine 2 Machine) Applications.Remote control of appliances.Remote Weather Station or Wireless Sensor Network.Vehicle tracking system with a GPS module.Good to learn GSM / GPRS mobile phone development, control development of remote equipment, wireless meter reading, smart appliances, ultra long distance control, etc..
Control via AT commands - Standard Commands: GSM 07.07 & 07.05 | Enhanced.
Power jack - connected to external 4.8~5VDC power supply, Antenna interface - connected to external antenna, Serial port select - select either software s....

The DFPlayer Mini is a small and low cost MP3 module player with an simplified output directly to the speaker. The module can be used as a stand alone module with attached battery, speaker and push buttons or used in combination with an or any other with RX/TX capabilities..
The DFPlayer perfectly integrates hard decoding module, through a simple serial port, which supports common audio formats , you can play the designated music without any other tedious underlying operations. The module perfectly integrated hardware decode MP3, WAV, WMA..
SPECIFICATION Supported sampling rates (kHz): 8 / 11.025 / 12/16 / 22.05 / 24/32 / 44.1 / 48 , 24-bit DAC output, support dynamic range: 90dB, SNR support: 85dB..
The software supports TF card driver, maximum support 32G of the TF card.
IO control mode, serial mode, AD key control mode are available to choose. A variety of applications such as Vehicle navigation voice, multichannel voice alarm, automatic alarm for equipment failure, timed broadcasting.radio spots language function, you can pause the background music being played. Advertising finished playing background sound continues to play back..

The factory setting is slave mode, but you can set this module to master mode so that you might be able to connect to other Bluetooth 2.0 devices.HC-05 Wireless BT Module.
HC-05 Wireless BT Module: with this HC 05 Bluetooth module,You can quickly add the Bluetooth feature to your Arduino project, and then you can use your android phone to control some gadgets, such as: switch, LED..
Master and Slave 2-IN-1 HC 05 Module:Working Voltage 3.6V to 6V , Default baud rate:9600,Default pin:1234.
Button: Press the button, the module enter the AT mode. AT commands are executed only in AT mode..
6 PIN Dopunt Cable : with this Dupont Cable, you can easily connect this HC-05 Bluetooth module to your Arduino Board.

The module is a low-power consumption character LCD Module with a built-in controller..
The module can be easily interfaced with a MCU..
Display Format: 20 Characters x 4 lines..
Fully assembled and tested Serial LCD 20x4 Module..