mirror of https://github.com/arendst/Tasmota.git
491 lines
16 KiB
C++
491 lines
16 KiB
C++
/*
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xsns_bmp.ino - BMP pressure, temperature and humidity sensor support for Sonoff-Tasmota
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Copyright (C) 2017 Heiko Krupp and 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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#ifdef USE_I2C
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#ifdef USE_BMP
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/*********************************************************************************************\
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* BMP085, BMP180, BMP280, BME280 - Pressure and Temperature and Humidy (BME280 only)
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*
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* Source: Heiko Krupp and Adafruit Industries
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\*********************************************************************************************/
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#define BMP_ADDR 0x77
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#define BMP180_CHIPID 0x55
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#define BMP280_CHIPID 0x58
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#define BME280_CHIPID 0x60
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#define BMP_REGISTER_CHIPID 0xD0
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uint8_t bmpaddr;
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uint8_t bmptype = 0;
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char bmpstype[7];
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/*********************************************************************************************\
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* BMP085 and BME180
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*
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* Programmer : Heiko Krupp with changes from Theo Arends
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\*********************************************************************************************/
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#define BMP180_REG_CONTROL 0xF4
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#define BMP180_REG_RESULT 0xF6
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#define BMP180_TEMPERATURE 0x2E
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#define BMP180_PRESSURE3 0xF4 // Max. oversampling -> OSS = 3
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#define BMP180_AC1 0xAA
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#define BMP180_AC2 0xAC
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#define BMP180_AC3 0xAE
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#define BMP180_AC4 0xB0
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#define BMP180_AC5 0xB2
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#define BMP180_AC6 0xB4
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#define BMP180_VB1 0xB6
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#define BMP180_VB2 0xB8
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#define BMP180_MB 0xBA
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#define BMP180_MC 0xBC
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#define BMP180_MD 0xBE
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#define BMP180_OSS 3
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int16_t cal_ac1;
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int16_t cal_ac2;
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int16_t cal_ac3;
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int16_t cal_b1;
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int16_t cal_b2;
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int16_t cal_mc;
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int16_t cal_md;
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uint16_t cal_ac4;
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uint16_t cal_ac5;
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uint16_t cal_ac6;
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int32_t bmp180_b5 = 0;
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boolean bmp180_calibration()
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{
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cal_ac1 = i2c_read16(bmpaddr, BMP180_AC1);
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cal_ac2 = i2c_read16(bmpaddr, BMP180_AC2);
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cal_ac3 = i2c_read16(bmpaddr, BMP180_AC3);
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cal_ac4 = i2c_read16(bmpaddr, BMP180_AC4);
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cal_ac5 = i2c_read16(bmpaddr, BMP180_AC5);
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cal_ac6 = i2c_read16(bmpaddr, BMP180_AC6);
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cal_b1 = i2c_read16(bmpaddr, BMP180_VB1);
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cal_b2 = i2c_read16(bmpaddr, BMP180_VB2);
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cal_mc = i2c_read16(bmpaddr, BMP180_MC);
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cal_md = i2c_read16(bmpaddr, BMP180_MD);
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// Check for Errors in calibration data. Value never is 0x0000 or 0xFFFF
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if (!cal_ac1 | !cal_ac2 | !cal_ac3 | !cal_ac4 | !cal_ac5 | !cal_ac6 | !cal_b1 | !cal_b2 | !cal_mc | !cal_md) {
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return false;
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}
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if ((cal_ac1 == 0xFFFF)|
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(cal_ac2 == 0xFFFF)|
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(cal_ac3 == 0xFFFF)|
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(cal_ac4 == 0xFFFF)|
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(cal_ac5 == 0xFFFF)|
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(cal_ac6 == 0xFFFF)|
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(cal_b1 == 0xFFFF)|
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(cal_b2 == 0xFFFF)|
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(cal_mc == 0xFFFF)|
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(cal_md == 0xFFFF)) {
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return false;
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}
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return true;
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}
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double bmp180_readTemperature()
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{
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i2c_write8(bmpaddr, BMP180_REG_CONTROL, BMP180_TEMPERATURE);
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delay(5); // 5ms conversion time
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int ut = i2c_read16(bmpaddr, BMP180_REG_RESULT);
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int32_t x1 = (ut - (int32_t)cal_ac6) * ((int32_t)cal_ac5) >> 15;
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int32_t x2 = ((int32_t)cal_mc << 11) / (x1+(int32_t)cal_md);
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bmp180_b5=x1+x2;
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return ((bmp180_b5+8)>>4)/10.0;
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}
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double bmp180_readPressure()
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{
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int32_t p;
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uint8_t msb;
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uint8_t lsb;
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uint8_t xlsb;
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i2c_write8(bmpaddr, BMP180_REG_CONTROL, BMP180_PRESSURE3); // Highest resolution
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delay(2 + (4 << BMP180_OSS)); // 26ms conversion time at ultra high resolution
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uint32_t up = i2c_read24(bmpaddr, BMP180_REG_RESULT);
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up >>= (8 - BMP180_OSS);
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int32_t b6 = bmp180_b5 - 4000;
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int32_t x1 = ((int32_t)cal_b2 * ( (b6 * b6)>>12 )) >> 11;
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int32_t x2 = ((int32_t)cal_ac2 * b6) >> 11;
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int32_t x3 = x1 + x2;
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int32_t b3 = ((((int32_t)cal_ac1*4 + x3) << BMP180_OSS) + 2)>>2;
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x1 = ((int32_t)cal_ac3 * b6) >> 13;
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x2 = ((int32_t)cal_b1 * ((b6 * b6) >> 12)) >> 16;
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x3 = ((x1 + x2) + 2) >> 2;
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uint32_t b4 = ((uint32_t)cal_ac4 * (uint32_t)(x3 + 32768)) >> 15;
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uint32_t b7 = ((uint32_t)up - b3) * (uint32_t)( 50000UL >> BMP180_OSS);
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if (b7 < 0x80000000) {
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p = (b7 * 2) / b4;
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} else {
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p = (b7 / b4) * 2;
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}
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x1 = (p >> 8) * (p >> 8);
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x1 = (x1 * 3038) >> 16;
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x2 = (-7357 * p) >> 16;
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p += ((x1 + x2 + (int32_t)3791)>>4);
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return p/100.0; // convert to mbar
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}
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double bmp180_calcSealevelPressure(float pAbs, float altitude_meters)
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{
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double pressure = pAbs*100.0;
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return (double)(pressure / pow(1.0-altitude_meters/44330, 5.255))/100.0;
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}
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/*********************************************************************************************\
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* BMP280 and BME280
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*
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* Programmer : BMP280/BME280 Datasheet and Adafruit with changes by Theo Arends
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\*********************************************************************************************/
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#define BME280_REGISTER_CONTROLHUMID 0xF2
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#define BME280_REGISTER_CONTROL 0xF4
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#define BME280_REGISTER_PRESSUREDATA 0xF7
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#define BME280_REGISTER_TEMPDATA 0xFA
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#define BME280_REGISTER_HUMIDDATA 0xFD
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#define BME280_REGISTER_DIG_T1 0x88
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#define BME280_REGISTER_DIG_T2 0x8A
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#define BME280_REGISTER_DIG_T3 0x8C
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#define BME280_REGISTER_DIG_P1 0x8E
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#define BME280_REGISTER_DIG_P2 0x90
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#define BME280_REGISTER_DIG_P3 0x92
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#define BME280_REGISTER_DIG_P4 0x94
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#define BME280_REGISTER_DIG_P5 0x96
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#define BME280_REGISTER_DIG_P6 0x98
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#define BME280_REGISTER_DIG_P7 0x9A
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#define BME280_REGISTER_DIG_P8 0x9C
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#define BME280_REGISTER_DIG_P9 0x9E
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#define BME280_REGISTER_DIG_H1 0xA1
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#define BME280_REGISTER_DIG_H2 0xE1
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#define BME280_REGISTER_DIG_H3 0xE3
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#define BME280_REGISTER_DIG_H4 0xE4
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#define BME280_REGISTER_DIG_H5 0xE5
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#define BME280_REGISTER_DIG_H6 0xE7
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struct bme280_calib_data
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{
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uint16_t dig_T1;
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int16_t dig_T2;
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int16_t dig_T3;
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uint16_t dig_P1;
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int16_t dig_P2;
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int16_t dig_P3;
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int16_t dig_P4;
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int16_t dig_P5;
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int16_t dig_P6;
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int16_t dig_P7;
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int16_t dig_P8;
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int16_t dig_P9;
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uint8_t dig_H1;
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int16_t dig_H2;
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uint8_t dig_H3;
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int16_t dig_H4;
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int16_t dig_H5;
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int8_t dig_H6;
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} _bme280_calib;
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int32_t t_fine;
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boolean bmp280_calibrate()
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{
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// if (i2c_read8(bmpaddr, BMP_REGISTER_CHIPID) != BMP280_CHIPID) return false;
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_bme280_calib.dig_T1 = i2c_read16_LE(bmpaddr, BME280_REGISTER_DIG_T1);
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_bme280_calib.dig_T2 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_T2);
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_bme280_calib.dig_T3 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_T3);
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_bme280_calib.dig_P1 = i2c_read16_LE(bmpaddr, BME280_REGISTER_DIG_P1);
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_bme280_calib.dig_P2 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P2);
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_bme280_calib.dig_P3 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P3);
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_bme280_calib.dig_P4 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P4);
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_bme280_calib.dig_P5 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P5);
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_bme280_calib.dig_P6 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P6);
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_bme280_calib.dig_P7 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P7);
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_bme280_calib.dig_P8 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P8);
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_bme280_calib.dig_P9 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P9);
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// i2c_write8(bmpaddr, BME280_REGISTER_CONTROL, 0x3F); // Temp 1x oversampling, Press 16x oversampling, normal mode (Adafruit)
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i2c_write8(bmpaddr, BME280_REGISTER_CONTROL, 0xB7); // 16x oversampling, normal mode (Adafruit)
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return true;
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}
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boolean bme280_calibrate()
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{
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// if (i2c_read8(bmpaddr, BMP_REGISTER_CHIPID) != BME280_CHIPID) return false;
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_bme280_calib.dig_T1 = i2c_read16_LE(bmpaddr, BME280_REGISTER_DIG_T1);
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_bme280_calib.dig_T2 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_T2);
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_bme280_calib.dig_T3 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_T3);
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_bme280_calib.dig_P1 = i2c_read16_LE(bmpaddr, BME280_REGISTER_DIG_P1);
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_bme280_calib.dig_P2 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P2);
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_bme280_calib.dig_P3 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P3);
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_bme280_calib.dig_P4 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P4);
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_bme280_calib.dig_P5 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P5);
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_bme280_calib.dig_P6 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P6);
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_bme280_calib.dig_P7 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P7);
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_bme280_calib.dig_P8 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P8);
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_bme280_calib.dig_P9 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_P9);
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_bme280_calib.dig_H1 = i2c_read8(bmpaddr, BME280_REGISTER_DIG_H1);
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_bme280_calib.dig_H2 = i2c_readS16_LE(bmpaddr, BME280_REGISTER_DIG_H2);
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_bme280_calib.dig_H3 = i2c_read8(bmpaddr, BME280_REGISTER_DIG_H3);
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_bme280_calib.dig_H4 = (i2c_read8(bmpaddr, BME280_REGISTER_DIG_H4) << 4) | (i2c_read8(bmpaddr, BME280_REGISTER_DIG_H4 + 1) & 0xF);
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_bme280_calib.dig_H5 = (i2c_read8(bmpaddr, BME280_REGISTER_DIG_H5 + 1) << 4) | (i2c_read8(bmpaddr, BME280_REGISTER_DIG_H5) >> 4);
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_bme280_calib.dig_H6 = (int8_t)i2c_read8(bmpaddr, BME280_REGISTER_DIG_H6);
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// Set before CONTROL_meas (DS 5.4.3)
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i2c_write8(bmpaddr, BME280_REGISTER_CONTROLHUMID, 0x05); // 16x oversampling (Adafruit)
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i2c_write8(bmpaddr, BME280_REGISTER_CONTROL, 0xB7); // 16x oversampling, normal mode (Adafruit)
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return true;
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}
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double bmp280_readTemperature(void)
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{
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int32_t var1;
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int32_t var2;
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int32_t adc_T = i2c_read24(bmpaddr, BME280_REGISTER_TEMPDATA);
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adc_T >>= 4;
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var1 = ((((adc_T>>3) - ((int32_t)_bme280_calib.dig_T1 <<1))) * ((int32_t)_bme280_calib.dig_T2)) >> 11;
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var2 = (((((adc_T>>4) - ((int32_t)_bme280_calib.dig_T1)) * ((adc_T>>4) - ((int32_t)_bme280_calib.dig_T1))) >> 12) *
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((int32_t)_bme280_calib.dig_T3)) >> 14;
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t_fine = var1 + var2;
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double T = (t_fine * 5 + 128) >> 8;
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return T / 100.0;
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}
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double bmp280_readPressure(void)
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{
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int64_t var1;
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int64_t var2;
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int64_t p;
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// Must be done first to get the t_fine variable set up
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// bmp280_readTemperature();
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int32_t adc_P = i2c_read24(bmpaddr, BME280_REGISTER_PRESSUREDATA);
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adc_P >>= 4;
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var1 = ((int64_t)t_fine) - 128000;
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var2 = var1 * var1 * (int64_t)_bme280_calib.dig_P6;
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var2 = var2 + ((var1 * (int64_t)_bme280_calib.dig_P5) << 17);
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var2 = var2 + (((int64_t)_bme280_calib.dig_P4) << 35);
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var1 = ((var1 * var1 * (int64_t)_bme280_calib.dig_P3) >> 8) + ((var1 * (int64_t)_bme280_calib.dig_P2) << 12);
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var1 = (((((int64_t)1) << 47) + var1)) * ((int64_t)_bme280_calib.dig_P1) >> 33;
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if (0 == var1) {
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return 0; // avoid exception caused by division by zero
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}
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p = 1048576 - adc_P;
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p = (((p << 31) - var2) * 3125) / var1;
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var1 = (((int64_t)_bme280_calib.dig_P9) * (p >> 13) * (p >> 13)) >> 25;
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var2 = (((int64_t)_bme280_calib.dig_P8) * p) >> 19;
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p = ((p + var1 + var2) >> 8) + (((int64_t)_bme280_calib.dig_P7) << 4);
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return (double)p / 25600.0;
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}
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double bme280_readHumidity(void)
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{
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int32_t v_x1_u32r;
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// Must be done first to get the t_fine variable set up
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// bmp280_readTemperature();
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int32_t adc_H = i2c_read16(bmpaddr, BME280_REGISTER_HUMIDDATA);
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v_x1_u32r = (t_fine - ((int32_t)76800));
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v_x1_u32r = (((((adc_H << 14) - (((int32_t)_bme280_calib.dig_H4) << 20) -
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(((int32_t)_bme280_calib.dig_H5) * v_x1_u32r)) + ((int32_t)16384)) >> 15) *
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(((((((v_x1_u32r * ((int32_t)_bme280_calib.dig_H6)) >> 10) *
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(((v_x1_u32r * ((int32_t)_bme280_calib.dig_H3)) >> 11) + ((int32_t)32768))) >> 10) +
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((int32_t)2097152)) * ((int32_t)_bme280_calib.dig_H2) + 8192) >> 14));
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v_x1_u32r = (v_x1_u32r - (((((v_x1_u32r >> 15) * (v_x1_u32r >> 15)) >> 7) *
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((int32_t)_bme280_calib.dig_H1)) >> 4));
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v_x1_u32r = (v_x1_u32r < 0) ? 0 : v_x1_u32r;
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v_x1_u32r = (v_x1_u32r > 419430400) ? 419430400 : v_x1_u32r;
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double h = (v_x1_u32r >> 12);
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return h / 1024.0;
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}
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/*********************************************************************************************\
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* BMP
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\*********************************************************************************************/
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double bmp_readTemperature(void)
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{
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double t = NAN;
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switch (bmptype) {
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case BMP180_CHIPID:
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t = bmp180_readTemperature();
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break;
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case BMP280_CHIPID:
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case BME280_CHIPID:
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t = bmp280_readTemperature();
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}
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if (!isnan(t)) {
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t = convertTemp(t);
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return t;
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}
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return 0;
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}
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double bmp_readPressure(void)
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{
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switch (bmptype) {
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case BMP180_CHIPID:
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return bmp180_readPressure();
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case BMP280_CHIPID:
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case BME280_CHIPID:
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return bmp280_readPressure();
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}
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return 0;
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}
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double bmp_readHumidity(void)
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{
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switch (bmptype) {
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case BMP180_CHIPID:
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case BMP280_CHIPID:
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break;
|
|
case BME280_CHIPID:
|
|
return bme280_readHumidity();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
boolean bmp_detect()
|
|
{
|
|
if (bmptype) {
|
|
return true;
|
|
}
|
|
|
|
char log[LOGSZ];
|
|
boolean success = false;
|
|
|
|
bmpaddr = BMP_ADDR;
|
|
bmptype = i2c_read8(bmpaddr, BMP_REGISTER_CHIPID);
|
|
if (!bmptype) {
|
|
bmpaddr--;
|
|
bmptype = i2c_read8(bmpaddr, BMP_REGISTER_CHIPID);
|
|
}
|
|
strcpy_P(bmpstype, PSTR("BMP"));
|
|
switch (bmptype) {
|
|
case BMP180_CHIPID:
|
|
success = bmp180_calibration();
|
|
strcpy_P(bmpstype, PSTR("BMP180"));
|
|
break;
|
|
case BMP280_CHIPID:
|
|
success = bmp280_calibrate();
|
|
strcpy_P(bmpstype, PSTR("BMP280"));
|
|
break;
|
|
case BME280_CHIPID:
|
|
success = bme280_calibrate();
|
|
strcpy_P(bmpstype, PSTR("BME280"));
|
|
}
|
|
if (success) {
|
|
snprintf_P(log, sizeof(log), PSTR("I2C: %s found at address 0x%x"), bmpstype, bmpaddr);
|
|
addLog(LOG_LEVEL_DEBUG, log);
|
|
} else {
|
|
bmptype = 0;
|
|
}
|
|
return success;
|
|
}
|
|
|
|
/*********************************************************************************************\
|
|
* Presentation
|
|
\*********************************************************************************************/
|
|
|
|
void bmp_mqttPresent(char* svalue, uint16_t ssvalue, uint8_t* djson)
|
|
{
|
|
if (!bmptype) {
|
|
return;
|
|
}
|
|
|
|
char stemp1[10];
|
|
char stemp2[10];
|
|
char stemp3[10];
|
|
|
|
double t = bmp_readTemperature();
|
|
double p = bmp_readPressure();
|
|
double h = bmp_readHumidity();
|
|
dtostrf(t, 1, sysCfg.flag.temperature_resolution, stemp1);
|
|
dtostrf(p, 1, sysCfg.flag.pressure_resolution, stemp2);
|
|
dtostrf(h, 1, sysCfg.flag.humidity_resolution, stemp3);
|
|
if (!strcmp(bmpstype,"BME280")) {
|
|
snprintf_P(svalue, ssvalue, PSTR("%s, \"%s\":{\"Temperature\":%s, \"Humidity\":%s, \"Pressure\":%s}"),
|
|
svalue, bmpstype, stemp1, stemp3, stemp2);
|
|
} else {
|
|
snprintf_P(svalue, ssvalue, PSTR("%s, \"%s\":{\"Temperature\":%s, \"Pressure\":%s}"),
|
|
svalue, bmpstype, stemp1, stemp2);
|
|
}
|
|
*djson = 1;
|
|
#ifdef USE_DOMOTICZ
|
|
domoticz_sensor3(stemp1, stemp3, stemp2);
|
|
#endif // USE_DOMOTICZ
|
|
}
|
|
|
|
#ifdef USE_WEBSERVER
|
|
String bmp_webPresent()
|
|
{
|
|
String page = "";
|
|
if (bmptype) {
|
|
char stemp[10];
|
|
char sensor[80];
|
|
|
|
double t_bmp = bmp_readTemperature();
|
|
double p_bmp = bmp_readPressure();
|
|
double h_bmp = bmp_readHumidity();
|
|
dtostrf(t_bmp, 1, sysCfg.flag.temperature_resolution, stemp);
|
|
snprintf_P(sensor, sizeof(sensor), HTTP_SNS_TEMP, bmpstype, stemp, tempUnit());
|
|
page += sensor;
|
|
if (!strcmp(bmpstype,"BME280")) {
|
|
dtostrf(h_bmp, 1, sysCfg.flag.humidity_resolution, stemp);
|
|
snprintf_P(sensor, sizeof(sensor), HTTP_SNS_HUM, bmpstype, stemp);
|
|
page += sensor;
|
|
}
|
|
dtostrf(p_bmp, 1, sysCfg.flag.pressure_resolution, stemp);
|
|
snprintf_P(sensor, sizeof(sensor), HTTP_SNS_PRESSURE, bmpstype, stemp);
|
|
page += sensor;
|
|
}
|
|
return page;
|
|
}
|
|
#endif // USE_WEBSERVER
|
|
#endif // USE_BMP
|
|
#endif // USE_I2C
|
|
|