Toyomasa Watarai / Grove_temperature

Seeed Grove Temperature sensor component library

Dependents:   Hello-grove-temperature-sensor Wio_3G_HTTP-POST-example Wio_3G_example sgam-lib ... more

Grove_temperature.cpp@1:aee37a51ccbb, 2018-08-06 (annotated)

Committer:
MACRUM
Date:
Mon Aug 06 09:24:54 2018 +0000
Revision:
1:aee37a51ccbb
Parent:
0:d4056a86ef8c 
Code clean up

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MACRUM 0:d4056a86ef8c 1
MACRUM 0:d4056a86ef8c 2 /**
MACRUM 0:d4056a86ef8c 3 ******************************************************************************
MACRUM 0:d4056a86ef8c 4 * @file Grove_temperature.cpp
MACRUM 0:d4056a86ef8c 5 * @author Toyomasa Watarai
MACRUM 0:d4056a86ef8c 6 * @version V1.0.0
MACRUM 0:d4056a86ef8c 7 * @date 6 Aug 2018
MACRUM 0:d4056a86ef8c 8 * @brief Seeed grove temperature sensor class implementation
MACRUM 0:d4056a86ef8c 9 ******************************************************************************
MACRUM 0:d4056a86ef8c 10 * @attention
MACRUM 0:d4056a86ef8c 11 *
MACRUM 0:d4056a86ef8c 12 * Licensed under the Apache License, Version 2.0 (the "License");
MACRUM 0:d4056a86ef8c 13 * you may not use this file except in compliance with the License.
MACRUM 0:d4056a86ef8c 14 * You may obtain a copy of the License at
MACRUM 0:d4056a86ef8c 15 *
MACRUM 0:d4056a86ef8c 16 * http://www.apache.org/licenses/LICENSE-2.0
MACRUM 0:d4056a86ef8c 17 *
MACRUM 0:d4056a86ef8c 18 * Unless required by applicable law or agreed to in writing, software
MACRUM 0:d4056a86ef8c 19 * distributed under the License is distributed on an "AS IS" BASIS,
MACRUM 0:d4056a86ef8c 20 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MACRUM 0:d4056a86ef8c 21 * See the License for the specific language governing permissions and
MACRUM 0:d4056a86ef8c 22 * limitations under the License.
MACRUM 0:d4056a86ef8c 23 */
MACRUM 1:aee37a51ccbb 24
MACRUM 1:aee37a51ccbb 25 #include "Grove_temperature.h"
MACRUM 0:d4056a86ef8c 26
MACRUM 0:d4056a86ef8c 27 Grove_temperature::Grove_temperature(PinName ain)
MACRUM 0:d4056a86ef8c 28 : _ain(ain)
MACRUM 0:d4056a86ef8c 29 {
MACRUM 0:d4056a86ef8c 30 }
MACRUM 0:d4056a86ef8c 31
MACRUM 0:d4056a86ef8c 32 Grove_temperature::~Grove_temperature()
MACRUM 0:d4056a86ef8c 33 {
MACRUM 0:d4056a86ef8c 34 }
MACRUM 0:d4056a86ef8c 35
MACRUM 0:d4056a86ef8c 36 float Grove_temperature::getTemperature()
MACRUM 0:d4056a86ef8c 37 {
MACRUM 0:d4056a86ef8c 38 const int B = 4275; // B value of the thermistor
MACRUM 0:d4056a86ef8c 39 const int R0 = 100000; // R0 = 100k
MACRUM 0:d4056a86ef8c 40
MACRUM 0:d4056a86ef8c 41 float R = 1.0f/_ain.read() - 1.0f;
MACRUM 0:d4056a86ef8c 42 R = R0*R;
MACRUM 0:d4056a86ef8c 43
MACRUM 0:d4056a86ef8c 44 float temperature = 1.0/(log(R/R0)/B+1/298.15)-273.15; // convert to temperature via datasheet
MACRUM 0:d4056a86ef8c 45 return temperature;
MACRUM 0:d4056a86ef8c 46 }