This post show how to test Adafruit nRF8001 Bluetooth LE module with nRF Master Control Panel (BLE) App on Android phone.
- First of all, we have to install Adafruit nRF8001 library to Arduino IDE and connect Arduino Uno with nRF8001 module. Refer last post "Adafruit nRF8001 Bluetooth LE".
adafruit/Adafruit_nRF8001 is driver and example code for Adafruit's nRF8001 Bluetooth Low Energy Breakout.
PINOUT
(The Fritzing part of Adafruit nRF8001 can be download HERE)
The pin locations are defined in ble_system.h, the supported systems are defined in hal_aci_tl.cpp. The following pinout is used by default for the Arduino Uno:
SCK -> Pin 13
MISO -> Pin 12
MOSI -> Pin 11
REQ -> Pin 10
RDY -> Pin 2 (HW interrupt)
ACT -> Not connected
RST -> Pin 9
3V0 - > Not connected
GND -> GND
VIN -> 5V
RDY must be on pin 2 since this pin requires a HW interrupt.
3V0 is an optional pin that exposes the output of the on-board 3.3V regulator. You can use this to supply 3.3V to other peripherals, but normally it will be left unconnected.
ACT is not currently used in any of the existing examples, and can be left unconnected if necessary.
We can connect HM-10 Bluetooth 4.0 BLE module to PC using FTDI USB-Serial adapter, via USB serial. Such that we can test it by sending AT command using terminal, such as Serial Monitor in Arduino IDE.
Connection:
HM-10 VCC - separated 3.3V
HM-10 GND - FTDI GND
HM-10 Tx - FTDI Rx
HM-10 Rx - FTDI Tx
(both HM-10 and FTDI adapter operate on 3.3V).
- Connect FTDI adapter to PC, via USB adapter.
- Run Arduino IDE, select correct port to FTDI adapter.
- Start Serial Monitor, set baud rate of 9600, and No line ending.
- Supply power (3.3V) to HM-10. Its on-board LED will blink.
- Then you can enter AT command in Arduino Serial Monitor.
By default, the service UUID and Characteristic of HM-10 are:
- Service UUID: 0xFFE0
- Characteristic: 0xFFE1
It can be referenced in HM-10 document. Or obtain from devices using AT command:
(you can set both service UUID and Characteristic using AT command also)
- Query service UUID: AT+UUID?
- Query Characteristic: AT+CHAR?
- document of HM-10 can be downloaded from http://www.jnhuamao.cn, it provide Chinese and English version, *please notice that the site maybe reported containing malware, so I download it in VirtualBox.
