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|
MLDP Code Example
Example: Bluetooth communication between Pc and Android Phone over MLDP
First you must turn on the Bluetooth on your Android phone (some phones require location service enabled).
The open the App BLE Terminal and press the button "SEARCH" and pair the ble device.
Set these settings:
Press the button CONNECT and wait the connection. Then open "SELECT SERVICE" and press "SELECT SERIAL SERVICE".
Now you can receive and send messages over MLDP.
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