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Merge pull request #7761 from device111/development
Add i2c Sensor AHT10/15 support.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,192 @@ | ||
| /* | ||
| xsns_63_AHT1x.ino - AHT10 I2C temperature and humidity sensor support for Tasmota | ||
| Copyright (C) 2020 Martin Wagner | ||
| 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_AHT1x | ||
| /*********************************************************************************************\ | ||
| * AHT10/15 - Temperature and Humidity | ||
| * | ||
| * I2C Address: 0x38 | ||
| \*********************************************************************************************/ | ||
|
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| #define XSNS_63 63 | ||
| #define XI2C_43 43 // See I2CDEVICES.md | ||
|
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| #define AHT10_ADDR 0x38 | ||
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| unsigned char eSensorCalibrateCmd[3] = {0xE1, 0x08, 0x00}; | ||
| unsigned char eSensorNormalCmd[3] = {0xA8, 0x00, 0x00}; | ||
| unsigned char eSensorMeasureCmd[3] = {0xAC, 0x33, 0x00}; | ||
| unsigned char eSensorResetCmd = 0xBA; | ||
|
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| struct AHT10 { | ||
| float humidity = NAN; | ||
| float temperature = NAN; | ||
| uint8_t valid = 0; | ||
| uint8_t count = 0; | ||
| char name[6] = "AHT1x"; | ||
| } AHT10; | ||
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|
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| bool AHT10Read(void) | ||
| { | ||
| unsigned long result_t, result_h, data[6]; | ||
|
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| if (AHT10.valid) { AHT10.valid--; } | ||
|
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| Wire.beginTransmission(AHT10_ADDR); | ||
| Wire.write(eSensorMeasureCmd, 3); | ||
| Wire.endTransmission(); | ||
| delay(100); | ||
|
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| Wire.requestFrom(AHT10_ADDR, 6); | ||
| for(uint8_t i = 0; Wire.available() > 0; i++) | ||
| { | ||
| data[i] = Wire.read(); | ||
| } | ||
|
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| result_h = ((data[1] << 16) | (data[2] << 8) | data[3]) >> 4; | ||
| result_t = ((data[3] & 0x0F) << 16) | (data[4] << 8) | data[5]; | ||
|
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| AHT10.humidity = result_h * 100 / 1048576; | ||
| AHT10.temperature = ((200 * result_t) / 1048576) - 50; | ||
|
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| if (isnan(AHT10.temperature) || isnan(AHT10.humidity)) { return false; } | ||
|
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| AHT10.valid = SENSOR_MAX_MISS; | ||
| return true; | ||
| } | ||
|
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| /********************************************************************************************/ | ||
| bool AHT10Init() | ||
| { | ||
| Wire.begin(AHT10_ADDR); | ||
| Wire.beginTransmission(AHT10_ADDR); | ||
| Wire.write(eSensorCalibrateCmd, 3); | ||
| Wire.endTransmission(); | ||
| delay(500); | ||
|
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| if((AHT10ReadStatus() & 0x68) == 0x08) { | ||
| return true;} | ||
| else | ||
| { return false; } | ||
| } | ||
|
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| unsigned char AHT10ReadStatus(void) | ||
| { | ||
| unsigned char result = 0; | ||
| Wire.requestFrom(AHT10_ADDR, 1); | ||
| result = Wire.read(); | ||
| return result; | ||
| } | ||
|
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| void AHT10Reset(void) | ||
| { | ||
| Wire.beginTransmission(AHT10_ADDR); | ||
| Wire.write(eSensorResetCmd); | ||
| Wire.endTransmission(); | ||
| delay(20); | ||
| } | ||
|
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||
| /********************************************************************************************/ | ||
| void AHT10Detect(void) | ||
| { | ||
| if (I2cActive(AHT10_ADDR)) | ||
| {return;} | ||
|
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| if (AHT10Init()) | ||
| { | ||
| I2cSetActiveFound(AHT10_ADDR, AHT10.name); | ||
| AHT10.count = 1; | ||
| } | ||
| } | ||
|
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| void AHT10EverySecond(void) | ||
| { | ||
| if (uptime &1) { | ||
| // AHT10: 55mS | ||
| if (!AHT10Read()) { | ||
| AddLogMissed(AHT10.name, AHT10.valid); | ||
| } | ||
| } | ||
| } | ||
|
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| void AHT10Show(bool json) | ||
| { | ||
| if (AHT10.valid) { | ||
| char temperature[33]; | ||
| dtostrfd(AHT10.temperature, Settings.flag2.temperature_resolution, temperature); | ||
| char humidity[33]; | ||
| dtostrfd(AHT10.humidity, Settings.flag2.humidity_resolution, humidity); | ||
|
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| if (json) { | ||
| ResponseAppend_P(JSON_SNS_TEMPHUM, AHT10.name, temperature, humidity); | ||
| #ifdef USE_DOMOTICZ | ||
| if ((0 == tele_period)) { | ||
| DomoticzTempHumSensor(temperature, humidity); | ||
| } | ||
| #endif // USE_DOMOTICZ | ||
| #ifdef USE_KNX | ||
| if (0 == tele_period) { | ||
| KnxSensor(KNX_TEMPERATURE, AHT10.temperature); | ||
| KnxSensor(KNX_HUMIDITY, AHT10.humidity); | ||
| } | ||
| #endif // USE_KNX | ||
| #ifdef USE_WEBSERVER | ||
| } else { | ||
| WSContentSend_PD(HTTP_SNS_TEMP, AHT10.name, temperature, TempUnit()); | ||
| WSContentSend_PD(HTTP_SNS_HUM, AHT10.name, humidity); | ||
| #endif // USE_WEBSERVER | ||
| } | ||
| } | ||
| } | ||
|
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| /*********************************************************************************************\ | ||
| * Interface | ||
| \*********************************************************************************************/ | ||
|
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| bool Xsns63(uint8_t function) | ||
| { | ||
| if (!I2cEnabled(XI2C_43)) { return false; } | ||
|
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| bool result = false; | ||
|
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| if (FUNC_INIT == function) { | ||
| AHT10Detect(); | ||
| } | ||
| else if (AHT10.count) { | ||
| switch (function) { | ||
| case FUNC_EVERY_SECOND: | ||
| AHT10EverySecond(); | ||
| break; | ||
| case FUNC_JSON_APPEND: | ||
| AHT10Show(1); | ||
| break; | ||
| #ifdef USE_WEBSERVER | ||
| case FUNC_WEB_SENSOR: | ||
| AHT10Show(0); | ||
| break; | ||
| #endif // USE_WEBSERVER | ||
| } | ||
| } | ||
| return result; | ||
| } | ||
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| #endif // USE_AHT10 | ||
| #endif // USE_I2C |