HM-18-BLE

An Arduino library for the HM-18 Bluetooth module from DSD TECH using the CC2640 chip. Made for version "HM10-V111" firmware, but might work with others.

Background

This code is based on the orginal from dennistreysa/HC-06-BT

Config

There is not much you can configure. A minimal setup looks like the following:

Bluetooth BT(2, 3); // RX, TX

If you want to, you can specify the baudrate of the controller:

Bluetooth BT(2, 3, 9600); // RX, TX

Limitations

As you can read here there are some limitations to the SoftwareSerial:

• If using multiple software serial ports, only one can receive data at a time.
• Not all pins on the Mega and Mega 2560 support change interrupts, so only the following can be used for RX: 10, 11, 12, 13, 14, 15, 50, 51, 52, 53, A8 (62), A9 (63), A10 (64), A11 (65), A12 (66), A13 (67), A14 (68), A15 (69).
• Not all pins on the Leonardo and Micro support change interrupts, so only the following can be used for RX: 8, 9, 10, 11, 14 (MISO), 15 (SCK), 16 (MOSI).
• On Arduino or Genuino 101 the current maximum RX speed is 57600bps
• On Arduino or Genuino 101 RX doesn't work on Pin 13

Resources

• DSD TECH DataSheet

Other Libraries

• Android with Arduino - Bluetooth by aron-bordin
• PNG-Arduino-Framework-master by aron-bordin