Chipset： ESPRESSIF-ESP32 240MHz Xtensa® single-/dual-core 32-bit LX6 microprocessor
FLASH： QSPI flash 4MB
SRAM： 520 kB SRAM
Button： Reset
USB to TTL： CP2104
Modular interface： UART,SPI,SDIO,I2C,LED PWM,TV PWM,I2S,IRGPIO,ADC,capacitor touch sensor,DACLNA pre-amplifier

☆Ultra-low standby power consumption 90uA~400uA
☆ Ultra-long connection distance 100 feet/60 meters
☆Super fast response speed 0.4 seconds
☆ Android, Apple, PC, MAC are all universal.
☆No byte limit for sending and receiving, up to 3K Bytes/sec
☆ No need to do MFI
☆ IOS system is perfectly supported.
☆Android 4.3 system is perfectly supported.

Model: JDY-34
Antenna type: PCB board mounted antenna
Working frequency band: 2.4G
Transmission power: 4dB (peak)
Communication interface: UART
Working voltage: 2.1V-3.6V
Working temperature: -40 ° C-80 ° C
Receiving sensitivity: -91dbm
Transmission distance: 40 meters
Module size: 27 * 12.88 * 1.8mm
Bluetooth version: BLE4.2+SSP dual-mode (backward compatible with 4.2, 4.0, 3.0, 2.1, 2.0)
Transmission rate: BLE14 K Bytes/s
SPP 40K byte/s (Android or computer Bluetooth tested 40K byte/s speed)
Command parameter saving: parameter configuration and power-off data are saved
SIM welding temperature:<260 ℃
Working current: 15mA

Model: JDY-23
Working frequency band: 2.4G
Transmission power: 4dB (maximum)
Communication interface: UART
Working voltage: 1.8-3.6V
Working temperature: -40 ℃ -80 ℃
Antenna: Built in PCB antenna
Receiving sensitivity: -97dbm
Transmission distance: 60 meters
Master Slave Support: Slave
Module size: 19.6 * 14.94 * 18mm (length, width, height)
Bluetooth version: BLE5.0 (also includes BLE4.0 and BLE4.2)
Wake up current: 800uA (with broadcast)
Shallow sleep current:<50uA (with broadcast)
Command parameters: Save parameter configuration, power-off data saved
SMT welding temperature:<260 ℃
RF TX/RX peak current: 5mA

Feature
No byte limit for serial port transmission and reception during transparent transmission
Effective communication distance within 80 meters
Working temperature: -40~+80 ℃
Communication rate 8k Bytes per second
Support UART and IIC communication methods
Working voltage: 1.8-3.3V

Feature
The JDY-08 transparent transmission module is based on the Bluetooth 4.0 protocol standard, with a working frequency range of 2.4GHz and a modulation method of GFSK. The maximum transmission power is 0dB and the maximum transmission distance is 80 meters. It adopts the TCC2541 chip design and supports users to modify device names, service UUID, transmission power, pairing passwords and other instructions through AT commands, making it convenient, fast, and flexible to use.

The DX-BT054.0 Bluetooth module is specially designed for intelligent wireless data transmission, using the CC2541 chip from T1 Company in the United States, with a configuration of 256Kb space, and following the V4.0 OBLE Bluetooth specification. Supports instruction A, allowing users to change parameters such as serial port baud rate, device name, pairing password, etc. as needed, making it flexible to use. This module supports UART interface and SPP Bluetooth serial protocol, which has the advantages of low cost, small size, low power consumption, and high sensitivity for transmitting and receiving. It only requires a few peripheral components to achieve its powerful functions.

Module Name: HC-42
Working frequency band: 24G
Communication interface: UART
Shutdown current: 0.3uA
Communication level: 1.8-3.6V
Transmission power: -40-4dBm
Communication distance: 40m/2Mbps (Bluetooth 5.0)
Antenna interface: built-in PCB antenna
Receiving sensitivity: -96dbm@1Mbps
Air speed: 1mbps/2mbps
Working humidity: 10% -90%
Storage temperature: -40 ° C~85 ° C
Working temperature: -25 ° C -75 ° C

Product model: HC-08
Working frequency band: 2.4G
Communication interface: UART3.3VTL level
Working voltage: 3.0-3.6V
RSSI support: not supported
Communication level: 3.3V
Transmission power: 4dBm
Reference distance: 80 meters
Air speed: 2Mbps
Antenna interface: built-in PCB antenna
Communication current: 0.4uA
Receiving sensitivity: 85dbm@2Mbps
Working humidity: 10%~90%
Storage temperature: 40 ℃ -+80 ℃
Working temperature: -25 ℃ -75 ℃

This product MH-M18 is a low-power Bluetooth design solution that supports the latest Bluetooth 4.2 transmission, supports Bluetooth automatic reconnection technology, and supports dual channel stereo lossless playback. After the module is connected to Bluetooth, it can quickly achieve Bluetooth wireless transmission, which is very convenient. In an open environment, the Bluetooth connection distance can reach up to 20 meters. Widely used in various Bluetooth audio reception, various audio DIY modifications, etc.

HC-06 with base board
HC-06 SMD Type