HLK-B40 is a kind of Master-Slave serial port

transmission Bluetooth module based on BLE5.1All kinds of devices with serial port can use Bluetooth wireless to send and receive data simply and quickly through this module.

The basic functions and features are as follows:

Main frequency 48MHz, 32-bit ARM Cortex M3 coreFast and stable Bluetooth-serial port transmission,serial port rate up to 921600 Master-to-one Bluetooth , which can be set to host orslave mode,supports binding encryptionBluetooth from the machine mode can be connected by up to 20 host devices at the same time, supporting custom broadcast dataBased on BLE5.1, it is faster and has a longer transmission distance and can reach 40 to 100 m in an open environmentSupportslow-power modes, sleep currents of up to6 μA and custom connection and broadcast intervalsBluetooth transmit power can be adjusted up to 10dBm and receives up to -95dBmSupport for OTA Bluetooth wireless upgrade module firmware, wireless configuration module parametersThe default on-board high-quality ceramic antenna increases the transmission distance and includes an external antennaBuilt-in Watchdog, Long and reliable operation timeUltrasmall size 14mm×9.5mm×2mmWide operating voltage 1.8 to 4.2V, typical 3.3VRich output pins (UART, I2C, SPI, up to 15 GPIOs, up to 4 ADCs, up to 6 PWMs) provide flexible and in-depth hardware and software custom development services