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Update and Add SHT3X_V3 driver (#1314)
* Add alternative support for SHT3x enabled with define USE_SHT3X_V2 in user_config.h (#1314) * Add alternative support for SHT3x enabled with define USE_SHT3X_V3 in user_config.h (#1314)
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/* | ||
xsns_14_sht3x.ino - SHT3X temperature and humidity sensor support for Sonoff-Tasmota | ||
Copyright (C) 2017 Theo Arends | ||
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/>. | ||
*/ | ||
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#ifdef USE_I2C | ||
#ifdef USE_SHT3X_V3 | ||
/*********************************************************************************************\ | ||
* SHT3X - Temperature and Humidy | ||
* | ||
* Required library: none but based on Wemos library | ||
* | ||
* I2C Address: 0x44 or 0x45 | ||
\*********************************************************************************************/ | ||
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#define SHT3X_ADDR_GND 0x44 // address pin low (GND) | ||
#define SHT3X_ADDR_VDD 0x45 // address pin high (VDD) | ||
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uint8_t sht3x_type = 0; | ||
uint8_t sht3x_address; | ||
uint8_t sht3x_addresses[] = { SHT3X_ADDR_GND, SHT3X_ADDR_VDD }; | ||
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bool Sht3xConvert() | ||
{ | ||
if (sht3x_type) { | ||
// Start I2C Transmission | ||
Wire.beginTransmission(sht3x_address); | ||
// Send measurement command | ||
Wire.write(0x2C); | ||
Wire.write(0x06); | ||
// Stop I2C transmission | ||
if (Wire.endTransmission() != 0) { | ||
return false; | ||
} | ||
} | ||
return true; | ||
} | ||
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bool Sht3xRead(float &t, float &h) | ||
{ | ||
unsigned int data[6]; | ||
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t = NAN; | ||
h = NAN; | ||
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// Request 6 bytes of data | ||
Wire.requestFrom(sht3x_address, (uint8_t)6); | ||
// Read 6 bytes of data | ||
// cTemp msb, cTemp lsb, cTemp crc, humidity msb, humidity lsb, humidity crc | ||
for (int i = 0; i < 6; i++) { | ||
data[i] = Wire.read(); | ||
}; | ||
delay(50); | ||
if (Wire.available() != 0) { | ||
return false; | ||
} | ||
// Convert the data | ||
t = ConvertTemp((float)((((data[0] << 8) | data[1]) * 175) / 65535.0) - 45); | ||
h = (float)((((data[3] << 8) | data[4]) * 100) / 65535.0); | ||
return true; | ||
} | ||
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/********************************************************************************************/ | ||
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void Sht3xDetect() | ||
{ | ||
if (sht3x_type) { | ||
return; | ||
} | ||
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sht3x_type = 1; | ||
for (byte i = 0; i < sizeof(sht3x_addresses); i++) { | ||
sht3x_address = sht3x_addresses[i]; | ||
if (Sht3xConvert()) { | ||
snprintf_P(log_data, sizeof(log_data), S_LOG_I2C_FOUND_AT, "SHT3X", sht3x_address); | ||
AddLog(LOG_LEVEL_DEBUG); | ||
return; | ||
} | ||
} | ||
sht3x_type = 0; | ||
} | ||
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void Sht3xShow(boolean json) | ||
{ | ||
if (sht3x_type) { | ||
float t; | ||
float h; | ||
if (Sht3xRead(t, h)) { | ||
char temperature[10]; | ||
char humidity[10]; | ||
dtostrfd(t, Settings.flag2.temperature_resolution, temperature); | ||
dtostrfd(h, Settings.flag2.humidity_resolution, humidity); | ||
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if (json) { | ||
snprintf_P(mqtt_data, sizeof(mqtt_data), JSON_SNS_TEMPHUM, mqtt_data, "SHT3X", temperature, humidity); | ||
#ifdef USE_DOMOTICZ | ||
DomoticzTempHumSensor(temperature, humidity); | ||
#endif // USE_DOMOTICZ | ||
#ifdef USE_WEBSERVER | ||
} else { | ||
snprintf_P(mqtt_data, sizeof(mqtt_data), HTTP_SNS_TEMP, mqtt_data, "SHT3X", temperature, TempUnit()); | ||
snprintf_P(mqtt_data, sizeof(mqtt_data), HTTP_SNS_HUM, mqtt_data, "SHT3X", humidity); | ||
#endif // USE_WEBSERVER | ||
} | ||
} | ||
} | ||
} | ||
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/*********************************************************************************************\ | ||
* Interface | ||
\*********************************************************************************************/ | ||
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#define XSNS_14 | ||
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boolean Xsns14(byte function) | ||
{ | ||
boolean result = false; | ||
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if (i2c_flg) { | ||
switch (function) { | ||
case FUNC_XSNS_INIT: | ||
Sht3xDetect(); | ||
break; | ||
case FUNC_XSNS_PREP: | ||
Sht3xConvert(); | ||
break; | ||
case FUNC_XSNS_JSON_APPEND: | ||
Sht3xShow(1); | ||
break; | ||
#ifdef USE_WEBSERVER | ||
case FUNC_XSNS_WEB: | ||
Sht3xShow(0); | ||
Sht3xConvert(); | ||
break; | ||
#endif // USE_WEBSERVER | ||
} | ||
} | ||
return result; | ||
} | ||
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#endif // USE_SHT3X_V3 | ||
#endif // USE_I2C |