BLE2 click – Bluetooth Low Energy click

BLE2 click – Bluetooth Low Energy click

R 571.35

  • USD: $ 39.35

BLE2 click, a low-cost click board to interface a microcontroller project with a Bluetooth Low Energy module.
Note: Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE

Brand: MikroElektronika

Availability: 2 in stock SKU: STC-00131 Categories: , , Tags: ,
  • Description
  • Specifications
  • Additional information
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The BLE2, Bluetooth Low Energy click features the Microchip RN4020 module with a complete Bluetooth stack, and can act both as a client or a server. Additionally, the RN4020 module supports 13 public profiles and 17 public services, including the MicroChip Low-energy Data Profile (MLDP).

The click communicates with the target board’s microcontroller through mikroBUS™ RX, TX and AN (here, CMD), PWM (con.), and RST (wake) lines. The board is designed to use a 3.3V power supply only.

ApplicationsBluetooth Low Energy is becoming a pervasive standard for IoT applications in any number of domains (home automation, fitness, health and so on). Because of MLDP support, BLE2 click works great in pairs
On-board modulesMicroChip RN4020
Key FeaturesN4020 Bluetooth 4.1 module. PCB antenna. Integrated TCP/IP stack
Key BenefitsMLDP support makes it easy to connect a pair of BLE2 clicks. Can be setup both as a client or a server
Input Voltage3.3V
Click board sizeS (28.6 x 25.4 mm)

Pinout diagram
This table shows how the pinout on BLE2 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

NotesPinMikrobus logo.pngPinNotes
Indicates connection stateCONN1ANPWM16CMD/MLDPCommand or MLDP mode
Power supply+3.3V73.3V5V10NC


The code sets up the BLE2 click board, and sends messages through Bluetooth low energy every 5 seconds. If the BLE2 click board receives messages over Bluetooth low energy, the code displays the message and updates the buffer

01 void main() {
02   Display_Init();
03   MCU_Init();
04   #ifdef INIT_BLE
05   BLE_Init();
06   delay_ms(2000);
07   #else
08   RN_WAKE = 1;
09   wait_response("CMD");
10   #endif
11   DrawFrame();
12   InitTimer2();
13   while(1)
14   {
15     if(data_ready)
16     {
17       //If characteristic is configured as write
18       //received messages come here
19       Display_Message();
20       reset_buff();
21     }
22     else
23     {
24        //Test: every 5sec increase baterry level (0 to 100%)
25        //and send value via Bluetooth Low Energy
26        if (tmr_flg)
27        {
28           batt_level++;
29           if(batt_level > 100)
30           {
31             batt_level = 0;
32           }
33           Display_BatteryLevel();
34           if(RN_CONN)
35           { //send battery level value if BLE connected
36             shorttohex(batt_level, batt_level_txt);
37             ltrim(batt_level_txt);
38             ble2_write_server_characteristic_value_via_UUID("2A19",batt_level_txt);
39           }
40           tmr_flg = 0;
41        }
42     }
43   }
44 }


Additional information

Weight30 g


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