This code set discoverable/connectable mode on Waspmote to allow connections from other BLE devices. Then wait during 30 seconds for incoming connections. If a connection is established, the connection is encrypted and then Waspmote keeps connected till the master ends the connection.
Required Materials
1 x Waspmote
1 x Battery
1 x Bluetooth Low Energy module
1 x Bluetooth module antenna
1 x Expansion board (if socket 1 is used)
1 x SD card
1 x BLE node to act as master (can be another Waspmote + BLE module or a smartphone).
Notes
- Socket 0 is used by default
- EEPROM is used in this example by default.
- Never unplug module while Waspmote is turned ON.
- Bluetooth module antenna should be connected.
- The battery must be connected in ANY example.
- This example can be executed in Waspmote v12 and Waspmote v15
Code
/* * ------------------ [BLE_09] - Encrypted connection -------- * * Explanation: this code set discoverable/connectable mode on Waspmote to * allow connections from other BLE devices. Then wait during 30 seconds for * incoming connections. If a connection is established, the connection is * encrypted andthen Waspmote keeps connected till the master ends the connection. * * Copyright (C) 2016 Libelium Comunicaciones Distribuidas S.L. * http://www.libelium.com * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS ARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . * * Version: 1.0 * Design: David Gascón * Implementation: Javier Siscart */#include<WaspBLE.h>// Variable to store function returning valuesuint8_t flag =0;voidsetup() {USB.println(F("BLE_08 Example")); // 0. Turn BLE module ONBLE.ON(SOCKET0);}voidloop() {// 1. make Waspmote visible to other BLE modulesBLE.setDiscoverableMode(BLE_GAP_GENERAL_DISCOVERABLE);// 2. make Waspmote connectable to any other BLE deviceBLE.setConnectableMode(BLE_GAP_UNDIRECTED_CONNECTABLE);USB.println(F("Waiting for incoming connections...")); /* 3. wait for connection status event during 30 seconds. connection status event structure: Field: | Message type | Payload| Msg Class | Msg ID | Connection | Flags |... Length: | 1 | 1 | 1 | 1 | 1 | 1 |... Example: | 80 | 10 | 03 | 00 | 00 | 05 |... ...| address | address type | con interval | timeout | latency | bonding | ...| 6 | 1 | 2 | 2 | 2 | 1 | ...| bf9e78800700 | 00 | 3c00F | 6400 | 0000 | 00 | */ flag =BLE.waitEvent(30000);if (flag == BLE_EVENT_CONNECTION_STATUS) {USB.println(F("Connected!"));USB.println(F("Now Waspmote is connected as slave.")); // 3.1 Parse the status event to find MAC of master device who initiated the connection.// NOTE: The event captured is stored in BLE.event array.uint8_t b =5;for(uint8_t a =0; a <6 ; a++) {BLE.BLEDev.mac[a] =BLE.event[b+6]; b--; }// 3.2 Print MAC of the Master device.USB.print(F("MASTER MAC Address: "));for(uint8_t i =0; i<6; i++) {USB.printHex(BLE.BLEDev.mac[i]); }USB.println();// 3.3 Encrypt the connection. Handle is 0 by default.if (BLE.encryptConnection(0) ==0) {USB.println(F("Connection encrypted")); }else {USB.println(F("Error encryting connection")); }// 3.4 now wait to other events forever. If disconnection is detected, exit loop. flag =0;while(flag != BLE_EVENT_CONNECTION_DISCONNECTED) {// if disconnected event, then exist the loop and start again.// Possible disconnection event: 80 03 03 04 00 13 02 flag =BLE.waitEvent(1000);if (flag !=0) {USB.println(F("Event found"));USB.print("flag = ");USB.println(flag, DEC);//// NOTE: here the user can add custom actions depending on the received envent.// } }// 4. if here, disconnected.USB.println(F("Disconnected")); }else {if (flag ==0) {// If there are no events, then no one tried to connect WaspmoteUSB.println(F("No events found. No devices tried to connect Waspmote.")); }else {// Other event received from BLE moduleUSB.print(F("Other event found. "));USB.print("flag = ");USB.println(flag, DEC); } }USB.println(); }
Output
H#
BLE_9 Example
Waiting for incoming connections...
Connected!
Now Waspmote is connected as slave.
MASTER MAC Address: CCC3EA6FA4B5
Connection encrypted
Disconnected