This is the NodeMCU development board based on ESP32, features WiFi+Bluetooth connectivity, onboard CP2102 and keys. What's more, all the I/O pins of ESP-WROOM-32 module are accessible via the extension headers.
Thanks to the rich open-source resources, it supports development in various ways such as Lua/AT commands/MicroPython/Arduino/IOT source code, etc. helps you to fast prototype IoT applications.
Onboard ESP-WROOM-32 module
Onboard CP2102, USB to UART converter
USB port for power input, firmware programming, or UART debugging
2x19pin extension headers, breakout all the I/O pins of the module
DFPlayer Mini MP3 module, can be directly connected to speakers
Module with power supply battery, speakers, buttons can be used alone, can also be controlled through the serial port, as a module for Arduino UNO or any microcontroller with a serial port
The module itself integrates MP3, WAV, WMA hard decoding, while the software supports TF card driver, FAT16, FAT32 file system
Through a simple serial port command can be completed to play the specified music, and how to play music and other functions, without the need for cumbersome underlying operations, easy to use, stable and reliable
Weight: about 2.8g
Size: about 3 x 3cm
Technical specifications:
Support sample rate (KHz): 8/11.025/12/16/22.05/24/32/44.1/48
There are MOS and other components on the board, which are easily damaged by soldering iron induction electricity or static electricity. Please make sure that the soldering iron used is grounded (and the ground wire of the power strip is connected). It is best to wear anti-static gloves when operating.
Be careful not to install the battery upside down, otherwise the board may burn.
Please choose a power supply with sufficient power. Only in this way can the board work properly.
The board power supply should not be higher than 5V.
Please do not modify the board without technical confirmation.
It is normal for the module to heat up when working at high power, just pay attention to fanning.
There are MOS and other components on the board, which are easily damaged by soldering iron induction electricity or static electricity. Please make sure that the soldering iron used is grounded (and the ground wire of the power strip is connected). It is best to wear anti-static gloves when operating.
Be careful not to install the battery upside down, otherwise the board may burn.
Please choose a power supply with sufficient power. Only in this way can the board work properly.
The board power supply should not be higher than 5V.
Please do not modify the board without technical confirmation.
It is normal for the module to heat up when working at high power, just pay attention to fanning.
Silent fan: reduce the overall temperature of the module, for the power supply, amplifier chip, filter capacitors and other heat dissipation, reduce the temperature rise and the impact of temperature rise on the sound quality, to ensure that the components of the long-term stability of work
Dial keys: easy to operate
Bluetooth version: 5.0 (no cover, 15 meters)
Input mode: AUX+Bluetooth+USB (dial-wheel button to switch modes and songs)
Number of channels: 2.1 channels (left channel + right channel + subwoofer)
Amplifier chip: TDA7498E
Adaptable power supply: DC 15-36V (below 9V undervoltage protection, can also support 12V power supply)