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/*
* Hot Beverage Companion – desktop application utilities
*
* Copyright (C) 2018 Gediminas Jakutis
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; version 2.1
* of the License.
*
* 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 FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <string.h>
#include "util.h"
#include "net.h"
static float digest_temp(const short int rawtemp);
static float digest_volt(const short int rawvolt);
/*
* raw data is in 0.1°K per 1. Subtract 2730 to get Celsius.
* Multiply by 0.1f (divide by 10) to get the correct scale.
*/
static float digest_temp(const short int rawtemp)
{
return (rawtemp - 2730) * 0.1f;
}
/*
* raw data is in 1/1024 parts of the max A0 input voltage
* on the D1 mini board, which is 3.2V
*/
static float digest_volt(const short int rawvolt)
{
return 3.2f / 1024.0f * rawvolt;
}
int refresh_data(int nd, struct tempmodule_state *state)
{
int ret;
char buf[dgsize];
ret = net_getlastdata(nd, buf);
if (ret == A_OK) {
memcpy(&state->sequence, buf + 2, sizeof(state->size));
state->temperature = digest_temp(state->temperature_raw);
state->voltage = digest_volt(state->voltage_raw);
}
return ret;
}
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