/* * 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 #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; }