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0212e57f44
Summary --------------------------------------------------------------------------------------------------------- Created a minimal demo application for Bluetooth. It works by displaying some data over Bluetooth and the user can connect to the device running it on NuttX and read this data. This can work in 2 scenarios: a real scenario, in which data from the BME680 (temperature, humidity, etc..) is used and the user will be able to read it. The second scenario involves displaying some dummy data (hardcoded values) for testing purposes. This application can serve as an example for users implementing more complex applications using Bluetooth on NuttX. Testing --------------------------------------------------------------------------------------------------------- I used the ESP32-Sparrow (which includes the BME680 sensor) and the ESP32-devkitc boards for testing. The Bluetooth stack starts by default with advertising when it initializes, however I noticed that enabling advertising in the stack does not work (at least on ESP32). However, when scanning is also enabled, the device starts advertising. Therefore, in our application, during the BLE services initialization part, I also enable scanning as a temporary workaround in order to make sure the device advertises and the user can see it and connect to it.
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/****************************************************************************
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* apps/examples/ble/sensors.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to you under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <fcntl.h>
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#include <poll.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <time.h>
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#include <stdio.h>
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/* Retrieves the current temperature */
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float get_temperature(void);
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/* Retrieves the current atmospheric pressure */
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float get_pressure(void);
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/* Retrieves the current gas resistance */
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float get_gas_resistance(void);
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/* Retrieves the current humidity */
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float get_humidity(void);
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/* Monitors sensors in a continuous loop */
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void *monitor_sensors(void *arg);
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/* Initializes the sensors */
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int init_sensors(void);
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/* Closes the sensors' file descriptors */
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void close_sensors_fd(void);
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