mirror of https://github.com/arendst/Tasmota.git
216 lines
7.1 KiB
C++
216 lines
7.1 KiB
C++
/*
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xsns_94_hdc2010.ino - Texas Instruments HDC1080 temperature and humidity sensor support for Tasmota
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Copyright (C) 2021 Luc Boudreau
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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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#ifdef USE_I2C
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#ifdef USE_HDC2010
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/*********************************************************************************************\
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* HDC2010 - Temperature and Humidity sensor
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*
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* Source: Luc Boudreau
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* Other sources: Luis Teixeira from the HDC1080 code (GPL3+)
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* sSense arduino library (Public Domain)
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*
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* I2C Address: 0x40
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\*********************************************************************************************/
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#define XSNS_94 94
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#define XI2C_64 64 // See I2CDEVICES.md
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#define HDC2010_ADDR 0x40
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// Registers:
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#define HDC2010_REG_TEMP_LSB 0x00 // Temperature register LSB
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#define HDC2010_REG_TEMP_MSB 0x01 // Temperature register MSB
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#define HDC2010_REG_RH_LSB 0x02 // Humidity register LSB
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#define HDC2010_REG_RH_MSB 0x03 // Humidity register MSB
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#define HDC2010_REG_INTR_DRDY 0x04 // Interrupt / Data Ready register
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#define HDC2010_REG_CONFIG 0x0F // Configuration register
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#define HDC2010_REG_RESET 0x0E // Reset register
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#define HDC2010_REG_MAN_LSB 0xFC // Manufacturer LSB
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#define HDC2010_REG_MAN_MSB 0xFD // Manufacturer MSB
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#define HDC2010_REG_DEV_LSB 0xFE // Device ID LSB
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#define HDC2010_REG_DEV_MSB 0xFF // Device ID MSB
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// Note: These are bit flipped. Actual IDs need to shift byte 0 and 1
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#define HDC2010_MAN_ID 0x4954 // Manufacturer ID (Texas Instruments)
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#define HDC2010_DEV_ID 0xD007 // Device ID (valid for the HDC2010)
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#define HDC2010_CONV_TIME 50
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struct HDC2010 {
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const char* hdc_type_name = "HDC2010";
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uint16_t hdc_manufacturer_id = 0;
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uint16_t hdc_device_id = 0;
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float hdc_temperature = 0.0;
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float hdc_humidity = 0.0;
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uint8_t hdc_valid = 0;
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} HDC2010;
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/**
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* Reads the device ID register.
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*/
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uint16_t Hdc2010ReadDeviceId(void) {
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return I2cRead16(HDC2010_ADDR, HDC2010_REG_DEV_LSB);
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}
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/**
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* Reads the manufacturer ID register.
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*/
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uint16_t Hdc2010ReadManufacturerId(void) {
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return I2cRead16(HDC2010_ADDR, HDC2010_REG_MAN_LSB);
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}
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/**
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* The various initialization steps for this sensor.
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*/
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void Hdc2010Init(void) {
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Hdc2010Reset();
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Hdc2010SetMeasurementConfig();
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HDC2010.hdc_valid = 1;
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}
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/**
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* Performs a temp and humidity read
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*/
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void Hdc2010Read(void) {
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uint8_t byte[2];
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uint16_t temp;
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uint16_t humidity;
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byte[0] = I2cRead8(HDC2010_ADDR, HDC2010_REG_TEMP_LSB);
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byte[1] = I2cRead8(HDC2010_ADDR, HDC2010_REG_TEMP_MSB);
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//AddLog(LOG_LEVEL_DEBUG, PSTR("HdcRead: temperature raw data: 0x%02x 0x%02x"), byte[0], byte[1]);
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temp = (unsigned int)(byte[1]) << 8 | (unsigned int) byte[0];
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//AddLog(LOG_LEVEL_DEBUG, PSTR("HdcRead: temperature shifted data: %d"), temp);
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HDC2010.hdc_temperature = (float)(temp) * 165 / 65536 - 40;
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//AddLog(LOG_LEVEL_DEBUG, PSTR("HdcRead: temperature : %2_f"), &hdc_temperature);
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byte[0] = I2cRead8(HDC2010_ADDR, HDC2010_REG_RH_LSB);
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byte[1] = I2cRead8(HDC2010_ADDR, HDC2010_REG_RH_MSB);
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//AddLog(LOG_LEVEL_DEBUG, PSTR("HdcRead: humidity raw data: 0x%02x 0x%02x"), byte[0], byte[1]);
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humidity = (unsigned int)byte[1] << 8 | byte[0];
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//AddLog(LOG_LEVEL_DEBUG, PSTR("HdcRead: humidity shifted data: %d"), humidity);
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HDC2010.hdc_humidity = (float)(humidity)/( 65536 )* 100;
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//AddLog(LOG_LEVEL_DEBUG, PSTR("HdcRead: humidity : %2_f"), &hdc_humidity);
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}
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/**
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* Performs a reset of the sensor (slow oper)
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*/
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void Hdc2010Reset(void) {
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uint8_t current = I2cRead8(HDC2010_ADDR, HDC2010_REG_RESET);
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//AddLog(LOG_LEVEL_DEBUG, PSTR("HdcReset: current reset registry value = %d"), current);
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current |= 0x80;
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//AddLog(LOG_LEVEL_DEBUG, PSTR("HdcReset: new reset registry value = %d"), current);
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I2cWrite8(HDC2010_ADDR, HDC2010_REG_RESET, current);
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delay(HDC2010_CONV_TIME);
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}
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/**
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* Detects the sensor
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*/
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bool Hdc2010Detect(void) {
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if (!I2cSetDevice(HDC2010_ADDR)) { return false; }
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HDC2010.hdc_manufacturer_id = Hdc2010ReadManufacturerId();
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HDC2010.hdc_device_id = Hdc2010ReadDeviceId();
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AddLog(LOG_LEVEL_DEBUG, PSTR("HdcDetect: detected device with manufacturerId = 0x%04X and deviceId = 0x%04X"), HDC2010.hdc_manufacturer_id, HDC2010.hdc_device_id);
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if (HDC2010.hdc_device_id == HDC2010_DEV_ID && HDC2010.hdc_manufacturer_id == HDC2010_MAN_ID) {
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//AddLog(LOG_LEVEL_DEBUG, PSTR("HdcDetect: adding device HDC2010"));
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Hdc2010Init();
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I2cSetActiveFound(HDC2010_ADDR, HDC2010.hdc_type_name);
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return true;
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}
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return false;
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}
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/**
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* Shows the sensor in the ui
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*/
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void Hdc2010Show(bool json) {
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if (HDC2010.hdc_valid) {
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TempHumDewShow(json, (0 == TasmotaGlobal.tele_period), HDC2010.hdc_type_name, HDC2010.hdc_temperature, HDC2010.hdc_humidity);
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}
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}
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/**
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* Configures measurement settings
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*/
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void Hdc2010SetMeasurementConfig() {
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uint8_t resetContents = I2cRead8(HDC2010_ADDR, HDC2010_REG_RESET);
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//AddLog(LOG_LEVEL_DEBUG, PSTR("HdcSetMeasureRate: current reset registry value = %d"), resetContents);
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// Measure twice per second
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resetContents |= 0x60;
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//AddLog(LOG_LEVEL_DEBUG, PSTR("HdcSetMeasureRate: new reset registry value = %d"), resetContents);
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I2cWrite8(HDC2010_ADDR, HDC2010_REG_RESET, resetContents);
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uint8_t configContents = I2cRead8(HDC2010_ADDR, HDC2010_REG_CONFIG);
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//AddLog(LOG_LEVEL_DEBUG, PSTR("HdcSetMeasureRate: current config registry value = %d"), configContents);
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// Measure both temp and humidity
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configContents |= 0x01;
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//AddLog(LOG_LEVEL_DEBUG, PSTR("HdcSetMeasureRate: new config registry value = %d"), configContents);
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I2cWrite8(HDC2010_ADDR, HDC2010_REG_CONFIG, configContents);
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}
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/*********************************************************************************************\
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* Interface
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\*********************************************************************************************/
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bool Xsns94(uint32_t function)
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{
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if (!I2cEnabled(XI2C_64)) {
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return false;
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}
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bool result = false;
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if (FUNC_INIT == function) {
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result = Hdc2010Detect();
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}
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else if (HDC2010.hdc_device_id) {
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switch (function) {
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case FUNC_EVERY_SECOND:
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if (HDC2010.hdc_valid) {
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Hdc2010Read();
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result = true;
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}
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break;
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case FUNC_JSON_APPEND:
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if (HDC2010.hdc_valid) {
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Hdc2010Show(1);
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}
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break;
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#ifdef USE_WEBSERVER
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case FUNC_WEB_SENSOR:
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Hdc2010Show(0);
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result = true;
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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_HDC2010
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#endif // USE_I2C
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