Tasmota/tasmota/xsns_78_ezohum.ino

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/*
xsns_78_ezohum.ino - EZO HUM I2C HUM sensor support for Tasmota
Copyright (C) 2020 Christopher Tremblay
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef USE_I2C
#ifdef USE_EZOHUM
#define EZO_HUM_READ_LATENCY 300
struct EZOHUM : public EZOStruct {
EZOHUM(uint32_t addr) : EZOStruct(addr), humidity(NAN), temperature(NAN) {}
virtual void ProcessMeasurement(void)
{
char data[D_EZO_MAX_BUF];
// Hum, Temp, Dew
EZOStruct::ProcessMeasurement(data, sizeof(data), EZO_HUM_READ_LATENCY);
humidity = CharToFloat(data);
char *next = strchr(data, ',');
if (next) {
temperature = CharToFloat(next + 1);
}
}
virtual void Show(bool json, const char *name)
{
if (isnan(temperature)) {
char parameter[FLOATSZ];
dtostrfd(humidity, Settings.flag2.humidity_resolution, parameter);
WSContentSend_PD(HTTP_SNS_HUM, name, parameter);
} else {
TempHumDewShow(json, (0 == tele_period), name, temperature, humidity);
}
}
static const char id[] PROGMEM;
private:
float humidity;
float temperature;
};
const char EZOHUM::id[] PROGMEM = "HUM";
#endif // USE_EZOHUM
#endif // USE_I2C