RN4020 Bluetooth BLE
Some weeks ago I bought this low cost Bluetooth Low Energy chip (RN4020) for test the bluetooth communication between this chip and an Android phone.
- Bluetooth version 4.1
- Simple ASCII command interface over UART
- Create custom services using command API
- 7 dBm transit power for 100m+ range
- Compact form factor 11.5 x 19.5 x 2.5mm
|RN4020 pin||Mbed pin|
|1 - GND||GND|
|5 - UART_TX||P27|
|6 - UART_RX||P28|
|7 - SWAKE||P5|
|8 - CMD/MLDP||P6|
|9 - GND||GND|
|15 - WAKE_HW||P7|
|16 - GND||GND|
|23 - VDD||3.3V|
|24 - GND||GND|
Example: Bluetooth communication between Pc and Android Phone
First you must turn on the Bluetooth on your Android phone.
The open the App BLE Terminal and press the button "SEARCH" and pair the ble device.
Press the button CONNECT and wait the connection.
The output of the terminal when mbed starts is:
Now you can receive and send messages.
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