OFF
MIKROE-2544
20 g
Status:
RN4871 click carries the RN4871 Bluetooth® 4.2 low energy module from Microchip.
The click is designed to run on a 3.3V power supply. It uses ASCII Command Interface over UART for communication with target microcontroller, with additional functionality provided by the following pins on the mikroBUS™ line: RST, CS, and INT.
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RN4871 click carries the RN4871 Bluetooth® 4.2 low energy module from Microchip. The click is designed to run on a 3.3V power supply. It uses ASCII Command Interface over UART for communication with target microcontroller, with additional functionality provided by the following pins on the mikroBUS™ line: RST, CS, and INT.
The RN4871 Bluetooth Low Energy module integrate Bluetooth 4.2 baseband controller, on-board Bluetooth stack, digital and analog I/O, and RF power amplifier into one solution.
The module contains an integral ceramic chip antenna.
All products in the RN series can be dynamically configured by the host microcontroller with a few simple ASCII commands.
The RN4871 supports both peripheral and central Generic Access Profile (GAP) roles, actively scanning for other connectable devices instead of waiting for incoming connection requests. The peripherals are usually small, low power devices like sensors and monitors, that broadcast information to the central device. The central device can communicate with multiple peripherals.
Type
BT/BLE
Applications
Health/Medical Devices, Sports Activity/Fitness Meters, Beacon Applications, Internet of Things (IoT) Sensor Tag, Remote Control, Wearable Smart Devices and Accessories, Smart Energy/Smart Home, Industrial Control
On-board modules
RN4871 Bluetooth module from Microchip
Key Features
Low energy module
Interface
GPIO,UART
ClickID
No
Compatibility
mikroBUS
Click board size
M (42.9 x 25.4 mm)
Input Voltage
3.3V
This table shows how the pinout on RN4871 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
Description | Min | Typ | Max | Unit |
---|---|---|---|---|
Supply Voltage | 1.9 | 3.6 | V | |
Frequency Band | 2.402 | 2.480 | GHz | |
Operating Temperature Range | -20°C | +70°C | ||
Sensitivity | 90dBm |
Code examples for RN4871 click, written for MikroElektronika hardware and compilers are available on Libstock.
The following code snippet shows send function for RN4xxx clicks. If the message type is correct, it will estabilish connection with the device specified by the address in the parameter and then send the properly formated data.
01 #define BTCMD( TXT ) UART2_Write_Text( TXT ) 02 void RN4xxx_send(char *pAddr, T_RN4xxx_message msgData ) 03 { 04 static char msgTxt [255]; 05 06 if (msgData.msgType == 'Q') 07 { 08 /*Connects to a device with specified adress*/ 09 BTCMD("C,1,"); 10 BTCMD (pAddr); 11 BTCMD("r"); 12 Delay_ms(3000); 13 /*Secures the connection, entering data stream mode*/ 14 BTCMD("Br"); 15 Delay_ms(3000); 16 } 17 /*Sentence construction */ 18 msgTxt[0] = '#'; 19 msgTxt[1] = msgData.msgType; 20 msgTxt[2] = ','; 21 msgTxt[3] = msgData.dataType/0x100; 22 msgTxt[4] = msgData.dataType%0x100; 23 msgTxt[5] = ','; 24 msgTxt[6] = msgData.id; 25 msgTxt[7] = ','; 26 msgTxt[8] = ''; 27 strcat (msgTxt, msgData.payload); 28 strcat (msgTxt, "*rn"); 29 30 BTCMD ( msgTxt ); 31 32 if (msgData.msgType == 'Q') 33 { 34 Delay_ms(3000); 35 /*Enters CMD mode*/ 36 BTCMD("$"); 37 Delay_ms(100); 38 BTCMD("$$$"); 39 Delay_ms(1000); 40 /*Kills connection*/ 41 BTCMD("K,1r"); 42 Delay_ms(500); 43 } 44 }