88 lines
2.5 KiB
C
Executable File
88 lines
2.5 KiB
C
Executable File
/****************************************************************************
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* apps/examples/scd41/scd41_main.c
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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. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* 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 <nuttx/config.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <nuttx/sensors/scd41.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* scd41_main
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****************************************************************************/
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int main(int argc, FAR char *argv[])
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{
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struct scd41_conv_data_s data;
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int fd;
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int ret;
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int i;
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printf("scd41 app is running.\n");
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fd = open(CONFIG_EXAMPLES_SCD41_DEVPATH, O_RDWR);
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if (fd < 0)
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{
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printf("ERROR: open failed: %d\n", fd);
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return -1;
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}
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for (i = 0; i < 20; i++)
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{
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/* Sensor data is updated every 5 seconds. */
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sleep(5);
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ret = ioctl(fd, SNIOC_READ_CONVERT_DATA, (unsigned long)&data);
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if (ret < 0)
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{
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printf("Read error.\n");
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printf("Sensor reported error %d\n", ret);
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}
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else
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{
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printf("CO2[ppm]: %.2f, Temperature[C]: %.2f, RH[%%]: %.2f\n",
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data.co2, data.temperature, data.humidity);
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}
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}
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ret = ioctl(fd, SNIOC_STOP, 0);
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if (ret < 0)
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{
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printf("Failed to stop: %d\n", errno);
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}
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close(fd);
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return 0;
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}
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