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HM-18 is the protocol of BLE 5.0, and the version is V110. HM-18 size is 13*28*2.2mm, integrated with master and slave, serial port transparent transmission, and supports universal learning function in host mode. As long as your slave device does not need a password when connected, and communication can be completed using LightBlue, HM-18 can communicate with him.

Main functions:

1. Master-slave integration, support serial port firmware upgrade

2. Transparent transmission function, efficient and safe data transmission

3. Transparent transmission+remote control function, intelligent identification of instructions and data

4. Large Transmission Unit (MTU)256Bytes/Package, the faster transmission speed

5. Rich AT command control system

6. Slave supports modifying service UUID

7. Slave supports modification of communication mode

8. Slave support iBeacon, Airsync

9. Slave supports sleep standby

10. Ultra-low power consumption, standby 50 to 200uA, 2.6mA during transmission

11. faster transmission speed, 2~8KB/S

12. The host supports intelligent self-learning function and can connect all standard BLE devices on the market, compatible with BLE4.0, 4.1 and 4.2

13. the host supports normal scanning, IBeacon scanning and full data scanning, and supports connection by MAC address.

14. The host supports dynamic lookup of Service, Char and dynamic communication through UUID handle.