mirror of https://github.com/arendst/Tasmota.git
136 lines
3.6 KiB
C++
136 lines
3.6 KiB
C++
/*
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xsns_02_analog.ino - ESP8266 ADC support for Sonoff-Tasmota
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Copyright (C) 2019 Theo Arends
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef USE_ADC_VCC
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/*********************************************************************************************\
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* ADC support
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\*********************************************************************************************/
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#define XSNS_02 2
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#define TO_CELSIUS(x) ((x) - 273.15)
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#define TO_KELVIN(x) ((x) + 273.15)
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#define ANALOG_V33 3.3
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#define ANALOG_R21 32000.0
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#define ANALOG_R0 10000.0
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#define ANALOG_T0 TO_KELVIN(25.0)
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#define ANALOG_B 3350.0
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uint16_t adc_last_value = 0;
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uint16_t AdcRead(void)
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{
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uint16_t analog = 0;
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for (uint8_t i = 0; i < 32; i++) {
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analog += analogRead(A0);
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delay(1);
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}
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analog >>= 5;
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return analog;
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}
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#ifdef USE_RULES
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void AdcEvery250ms(void)
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{
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if (my_module_flag.adc0) {
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uint16_t new_value = AdcRead();
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if ((new_value < adc_last_value -10) || (new_value > adc_last_value +10)) {
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adc_last_value = new_value;
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uint16_t value = adc_last_value / 10;
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Response_P(PSTR("{\"ANALOG\":{\"A0div10\":%d}}"), (value > 99) ? 100 : value);
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XdrvRulesProcess();
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}
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}
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}
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#endif // USE_RULES
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void AdcShow(bool json)
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{
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if (my_module_flag.adc0) {
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uint16_t analog = AdcRead();
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if (json) {
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ResponseAppend_P(PSTR(",\"ANALOG\":{\"A0\":%d}"), analog);
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#ifdef USE_WEBSERVER
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} else {
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WSContentSend_PD(HTTP_SNS_ANALOG, "", 0, analog);
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#endif // USE_WEBSERVER
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}
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}
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if (my_module_flag.adc0_temp) {
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int adc = analogRead(A0);
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// Formule used by Shelly 2.5 analog temperature sensor
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double Rt = (adc * ANALOG_R21) / (1024.0 * ANALOG_V33 - (double)adc);
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double T = ANALOG_B / (ANALOG_B/ANALOG_T0 + log(Rt/ANALOG_R0));
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double temp = ConvertTemp(TO_CELSIUS(T));
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char temperature[33];
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dtostrfd(temp, Settings.flag2.temperature_resolution, temperature);
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if (json) {
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ResponseAppend_P(JSON_SNS_TEMP, "ANALOG", temperature);
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#ifdef USE_DOMOTICZ
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if (0 == tele_period) {
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DomoticzSensor(DZ_TEMP, temperature);
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}
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#endif // USE_DOMOTICZ
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#ifdef USE_KNX
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if (0 == tele_period) {
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KnxSensor(KNX_TEMPERATURE, temp);
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}
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#endif // USE_KNX
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#ifdef USE_WEBSERVER
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} else {
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WSContentSend_PD(HTTP_SNS_TEMP, "", temperature, TempUnit());
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#endif // USE_WEBSERVER
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}
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}
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}
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/*********************************************************************************************\
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* Interface
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\*********************************************************************************************/
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bool Xsns02(uint8_t function)
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{
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bool result = false;
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if (my_module_flag.adc0 || my_module_flag.adc0_temp) {
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switch (function) {
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#ifdef USE_RULES
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case FUNC_EVERY_250_MSECOND:
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AdcEvery250ms();
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break;
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#endif // USE_RULES
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case FUNC_JSON_APPEND:
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AdcShow(1);
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break;
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#ifdef USE_WEBSERVER
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case FUNC_WEB_SENSOR:
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AdcShow(0);
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break;
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#endif // USE_WEBSERVER
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}
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}
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return result;
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}
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#endif // USE_ADC_VCC
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