mirror of https://github.com/arendst/Tasmota.git
111 lines
3.5 KiB
C++
111 lines
3.5 KiB
C++
/*
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Copyright (c) 2017 Theo Arends. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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- Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef USE_I2C
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#ifdef USE_BH1750
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/*********************************************************************************************\
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* BH1750 - Ambient Light Intensity
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\*********************************************************************************************/
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#define BH1750_ADDR1 0x23
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#define BH1750_ADDR2 0x5C
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#define BH1750_CONTINUOUS_HIGH_RES_MODE 0x10 // Start measurement at 1lx resolution. Measurement time is approx 120ms.
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uint8_t bh1750addr, bh1750type = 0;
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char bh1750stype[7];
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uint16_t bh1750_readLux(void)
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{
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Wire.requestFrom(bh1750addr, (uint8_t)2);
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byte msb = Wire.read();
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byte lsb = Wire.read();
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uint16_t value = ((msb << 8) | lsb) / 1.2;
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return value;
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}
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boolean bh1750_detect()
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{
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if (bh1750type) return true;
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char log[LOGSZ];
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uint8_t status;
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boolean success = false;
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bh1750addr = BH1750_ADDR1;
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Wire.beginTransmission(bh1750addr);
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Wire.write(BH1750_CONTINUOUS_HIGH_RES_MODE);
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status = Wire.endTransmission();
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if (status) {
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bh1750addr = BH1750_ADDR2;
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Wire.beginTransmission(bh1750addr);
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Wire.write(BH1750_CONTINUOUS_HIGH_RES_MODE);
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status = Wire.endTransmission();
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}
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if (!status) {
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success = true;
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bh1750type = 1;
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snprintf_P(bh1750stype, sizeof(bh1750stype), PSTR("BH1750"));
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}
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if (success) {
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snprintf_P(log, sizeof(log), PSTR("I2C: %s found at address 0x%x"), bh1750stype, bh1750addr);
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addLog(LOG_LEVEL_DEBUG, log);
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} else {
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bh1750type = 0;
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}
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return success;
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}
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/*********************************************************************************************\
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* Presentation
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\*********************************************************************************************/
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void bh1750_mqttPresent(char* svalue, uint16_t ssvalue, uint8_t* djson)
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{
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if (!bh1750type) return;
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uint16_t l = bh1750_readLux();
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snprintf_P(svalue, ssvalue, PSTR("%s, \"%s\":{\"Illuminance\":%d}"), svalue, bh1750stype, l);
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*djson = 1;
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#ifdef USE_DOMOTICZ
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domoticz_sensor5(l);
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#endif // USE_DOMOTICZ
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}
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#ifdef USE_WEBSERVER
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String bh1750_webPresent()
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{
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String page = "";
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if (bh1750type) {
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uint16_t l = bh1750_readLux();
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page += F("<tr><td>Illuminance: </td><td>"); page += String(l); page += F(" lx</td></tr>");
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}
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return page;
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}
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#endif // USE_WEBSERVER
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#endif // USE_BH1750
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#endif // USE_I2C
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