/* xsns_11_veml6070.ino - VEML6070 ultra violet light sensor support for Tasmota Copyright (C) 2021 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 . ----------------------------------------------------- Some words to the meaning of the UV Risk Level: ----------------------------------------------------- D_UV_INDEX_1 = "Low" = sun->fun D_UV_INDEX_2 = "Mid" = sun->glases advised D_UV_INDEX_3 = "High" = sun->glases a must D_UV_INDEX_4 = "Danger" = sun->skin burns Level 1 D_UV_INDEX_5 = "BurnL1/2" = sun->skin burns level 1..2 D_UV_INDEX_6 = "BurnL3" = sun->skin burns with level 3 D_UV_INDEX_7 = "OoR" = out of range or unknown -------------------------------------------------------------------------------------------- Version Date Action Description -------------------------------------------------------------------------------------------- 1.0.0.3 20181006 fixed - missing "" around the UV Index text - thanks to Lisa she had tested it on here mqtt system. -- 1.0.0.2 20180928 tests - same as in version 1.0.0.1 cleaned - source code changed - snprintf_P for json and web server output - much more compressed and more professional code added - uv_risk_text to json and web server output changed - switch (function) to be 100% compatible - added Veml6070EverySecond in thought of compatibile added - Veml6070UvTableInit to do this only once to spare time debugging - @Adrian helped me out in case of a %s%s in mqtt_data. Thank You Adrian next - possible i will add the calculation for LAT and LONG coordinates for much more precission (TBD) - show not only the UV Power value in W/m2, possible a @define value to show it as joule value (TBD) - add a #define to select how many characters are shown benhind the decimal point for the UV Index (TBD) --- 1.0.0.1 20180925 tests - all tests are done with 1x sonoff sv, 2x Wemos D1 (not the mini) - 3 different VEMl6070 sensors from 3 different online shops - all the last three test where good and all looks working so far - all tests are done at high noon with blue sky and a leaned UV light source sience - a special Thank You to my friend the professor. He works in the aerospace industrie. Thank You R.G.T. - all calculations are based on the very good work of Karel Vanicek. Thank You Karel - more information about UV Index and the irradiation power calculation can be found on the internet info - all calculations are based on the effective irradiation from Karel Vanicek - all this was not possible without the work of @arendst. He has done really a lot of basic work/code. Thank You Theo cleaned - source code a little bit added - missing void in function calls: void name(void) added - UV Risk level now defined as UV Index, 0.00 based on NASA standard with text behind the value added - UV Power level now named as UV Power, used W/m2 because official standards added - automatic fill of the uv-risk compare table based on the coefficient calculation added - suspend and wakeup mode for the uv seonsor - current drain in wake-up-ed mode was around 180uA incl. I2C bus - current drain in suspend mode was around 70..80uA incl. I2C bus changed - 2x the power calculation about some incorrent data sheet values changed - float to double calculation because a rare effect on uv compare map filling - in that case @andrethomas was a big help too (while(work){output=lot_of_fun};) added - USE_VEML6070_RSET - in user_config as possible input, different resistor values depending on PCB types added - USE_VEML6070_SHOW_RAW - in user_config, show or show-NOT the uv raw value added - lots of #defines for automatic calulations to get the best possible values added - error messages for LOG_LEVEL_DEBUG added - lots of information in one of the last postings in: https://github.com/arendst/Tasmota/issues/3844 debugging - without the softly hit ;-) from @andrethomas about Serial.print i would never done it. Thank You Andre safety - personal, please read this: http://www.segurancaetrabalho.com.br/download/uv_index_karel_vanicek.pdf next - possible i will add the calculation for LAT and LONG coordinates for much more precission - show not only the UV Power value in W/m2, possible a @define value to show it as joule value - add a #define to select how many characters are shown benhind the decimal point for the UV Index --- 1.0.0.0 20180912 started - further development by mike2nl - https://github.com/mike2nl/Sonoff-Tasmota forked - from arendst/tasmota - https://github.com/arendst/Tasmota base - code base from arendst too */ #ifdef USE_I2C #ifdef USE_VEML6070 /*********************************************************************************************\ * VEML6070 - Ultra Violet Light Intensity (UV-A, 100% output by 255nm) * * I2C Address: 0x38 and 0x39 \*********************************************************************************************/ #define XSNS_11 11 #define XI2C_12 12 // See I2CDEVICES.md #define VEML6070_ADDR_H 0x39 // on some PCB boards the address can be changed by a solder point, #define VEML6070_ADDR_L 0x38 // to have no address conflicts with other I2C sensors and/or hardware #define VEML6070_INTEGRATION_TIME 3 // IT_4 = 500msec integration time, because the precission is 4 times higher then IT_0.5 #define VEML6070_ENABLE 1 // #define VEML6070_DISABLE 0 // #define VEML6070_RSET_DEFAULT 270000 // 270K default resistor value 270000 ohm, range from 220K..1Meg #define VEML6070_UV_MAX_INDEX 15 // normal 11, internal on weather laboratories and NASA it's 15 so far the sensor is linear #define VEML6070_UV_MAX_DEFAULT 11 // 11 = public default table values #define VEML6070_POWER_COEFFCIENT 0.025 // based on calculations from Karel Vanicek and reorder by hand #define VEML6070_TABLE_COEFFCIENT 32.86270591 // calculated by hand with help from a friend of mine, a professor which works in aero space things // (resistor, differences, power coefficients and official UV index calculations (LAT & LONG will be added later) /********************************************************************************************/ // globals const char kVemlTypes[] PROGMEM = "VEML6070"; // in preperation of veml6075 double uv_risk_map[VEML6070_UV_MAX_INDEX] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; double uvrisk = 0; double uvpower = 0; uint16_t uvlevel = 0; uint8_t veml6070_addr_low = VEML6070_ADDR_L; uint8_t veml6070_addr_high = VEML6070_ADDR_H; uint8_t itime = VEML6070_INTEGRATION_TIME; uint8_t veml6070_type = 0; char veml6070_name[9]; char str_uvrisk_text[10]; /********************************************************************************************/ void Veml6070Detect(void) { if (I2cActive(VEML6070_ADDR_L)) { return; } // init the UV sensor Wire.beginTransmission(VEML6070_ADDR_L); Wire.write((itime << 2) | 0x02); uint8_t status = Wire.endTransmission(); // action on status if (!status) { veml6070_type = 1; Veml6070UvTableInit(); // 1[ms], initalize the UV compare table only once uint8_t veml_model = 0; GetTextIndexed(veml6070_name, sizeof(veml6070_name), veml_model, kVemlTypes); I2cSetActiveFound(VEML6070_ADDR_L, veml6070_name); } } /********************************************************************************************/ void Veml6070UvTableInit(void) { // fill the uv-risk compare table once, based on the coefficient calculation for (uint32_t i = 0; i < VEML6070_UV_MAX_INDEX; i++) { #ifdef USE_VEML6070_RSET if ( (USE_VEML6070_RSET >= 220000) && (USE_VEML6070_RSET <= 1000000) ) { uv_risk_map[i] = ( (USE_VEML6070_RSET / VEML6070_TABLE_COEFFCIENT) / VEML6070_UV_MAX_DEFAULT ) * (i+1); } else { uv_risk_map[i] = ( (VEML6070_RSET_DEFAULT / VEML6070_TABLE_COEFFCIENT) / VEML6070_UV_MAX_DEFAULT ) * (i+1); AddLog_P(LOG_LEVEL_DEBUG, PSTR(D_LOG_DEBUG "VEML6070 resistor error %d"), USE_VEML6070_RSET); } #else uv_risk_map[i] = ( (VEML6070_RSET_DEFAULT / VEML6070_TABLE_COEFFCIENT) / VEML6070_UV_MAX_DEFAULT ) * (i+1); AddLog_P(LOG_LEVEL_DEBUG, PSTR(D_LOG_DEBUG "VEML6070 resistor default used %d"), VEML6070_RSET_DEFAULT); #endif } } /********************************************************************************************/ void Veml6070EverySecond(void) { // all = 10..15[ms] Veml6070ModeCmd(1); // 1[ms], wakeup the UV sensor uvlevel = Veml6070ReadUv(); // 1..2[ms], get UV raw values uvrisk = Veml6070UvRiskLevel(uvlevel); // 0..1[ms], get UV risk level uvpower = Veml6070UvPower(uvrisk); // 2[ms], get UV power in W/m2 Veml6070ModeCmd(0); // off = 5[ms], suspend the UV sensor } /********************************************************************************************/ void Veml6070ModeCmd(bool mode_cmd) { // mode_cmd 1 = on = 1[ms] // mode_cmd 0 = off = 2[ms] Wire.beginTransmission(VEML6070_ADDR_L); Wire.write((mode_cmd << 0) | 0x02 | (itime << 2)); uint8_t status = Wire.endTransmission(); // action on status if (!status) { AddLog_P(LOG_LEVEL_DEBUG, PSTR(D_LOG_DEBUG "VEML6070 mode_cmd")); } } /********************************************************************************************/ uint16_t Veml6070ReadUv(void) { uint16_t uv_raw = 0; // read high byte if (Wire.requestFrom(VEML6070_ADDR_H, 1) != 1) { return -1; } uv_raw = Wire.read(); uv_raw <<= 8; // read low byte if (Wire.requestFrom(VEML6070_ADDR_L, 1) != 1) { return -1; } uv_raw |= Wire.read(); // high and low done return uv_raw; } /********************************************************************************************/ double Veml6070UvRiskLevel(uint16_t uv_level) { double risk = 0; if (uv_level < uv_risk_map[VEML6070_UV_MAX_INDEX-1]) { risk = (double)uv_level / uv_risk_map[0]; // generate uv-risk string if ( (risk >= 0) && (risk <= 2.9) ) { snprintf_P(str_uvrisk_text, sizeof(str_uvrisk_text), D_UV_INDEX_1); } else if ( (risk >= 3.0) && (risk <= 5.9) ) { snprintf_P(str_uvrisk_text, sizeof(str_uvrisk_text), D_UV_INDEX_2); } else if ( (risk >= 6.0) && (risk <= 7.9) ) { snprintf_P(str_uvrisk_text, sizeof(str_uvrisk_text), D_UV_INDEX_3); } else if ( (risk >= 8.0) && (risk <= 10.9) ) { snprintf_P(str_uvrisk_text, sizeof(str_uvrisk_text), D_UV_INDEX_4); } else if ( (risk >= 11.0) && (risk <= 12.9) ) { snprintf_P(str_uvrisk_text, sizeof(str_uvrisk_text), D_UV_INDEX_5); } else if ( (risk >= 13.0) && (risk <= 25.0) ) { snprintf_P(str_uvrisk_text, sizeof(str_uvrisk_text), D_UV_INDEX_6); } else { snprintf_P(str_uvrisk_text, sizeof(str_uvrisk_text), D_UV_INDEX_7); } return risk; } else { // out of range and much to high - it must be outerspace or sensor damaged snprintf_P(str_uvrisk_text, sizeof(str_uvrisk_text), D_UV_INDEX_7); return ( risk = 99 ); AddLog_P(LOG_LEVEL_DEBUG, PSTR(D_LOG_DEBUG "VEML6070 out of range %d"), risk); } } /********************************************************************************************/ double Veml6070UvPower(double uvrisk) { // based on calculations for effective irradiation from Karel Vanicek double power = 0; return ( power = VEML6070_POWER_COEFFCIENT * uvrisk ); } /********************************************************************************************/ // normaly in i18n.h, Line 520 .. 525 #ifdef USE_WEBSERVER // {s} = , {m} = , {e} = #ifdef USE_VEML6070_SHOW_RAW const char HTTP_SNS_UV_LEVEL[] PROGMEM = "{s}VEML6070 " D_UV_LEVEL "{m}%s " D_UNIT_INCREMENTS "{e}"; #endif // USE_VEML6070_SHOW_RAW // different uv index level texts const char HTTP_SNS_UV_INDEX[] PROGMEM = "{s}VEML6070 " D_UV_INDEX "{m}%s %s{e}"; const char HTTP_SNS_UV_POWER[] PROGMEM = "{s}VEML6070 " D_UV_POWER "{m}%s " D_UNIT_WATT_METER_QUADRAT "{e}"; #endif // USE_WEBSERVER /********************************************************************************************/ void Veml6070Show(bool json) { // convert double values to string char str_uvlevel[33]; // e.g. 99999 inc = UVLevel dtostrfd((double)uvlevel, 0, str_uvlevel); char str_uvrisk[33]; // e.g. 25.99 text = UvIndex dtostrfd(uvrisk, 2, str_uvrisk); char str_uvpower[33]; // e.g. 0.399 W/m² = UvPower dtostrfd(uvpower, 3, str_uvpower); if (json) { #ifdef USE_VEML6070_SHOW_RAW ResponseAppend_P(PSTR(",\"%s\":{\"" D_JSON_UV_LEVEL "\":%s,\"" D_JSON_UV_INDEX "\":%s,\"" D_JSON_UV_INDEX_TEXT "\":\"%s\",\"" D_JSON_UV_POWER "\":%s}"), veml6070_name, str_uvlevel, str_uvrisk, str_uvrisk_text, str_uvpower); #else ResponseAppend_P(PSTR(",\"%s\":{\"" D_JSON_UV_INDEX "\":%s,\"" D_JSON_UV_INDEX_TEXT "\":\"%s\",\"" D_JSON_UV_POWER "\":%s}"), veml6070_name, str_uvrisk, str_uvrisk_text, str_uvpower); #endif // USE_VEML6070_SHOW_RAW #ifdef USE_DOMOTICZ if (0 == TasmotaGlobal.tele_period) { DomoticzSensor(DZ_ILLUMINANCE, uvlevel); } #endif // USE_DOMOTICZ #ifdef USE_WEBSERVER } else { #ifdef USE_VEML6070_SHOW_RAW WSContentSend_PD(HTTP_SNS_UV_LEVEL, str_uvlevel); #endif // USE_VEML6070_SHOW_RAW WSContentSend_PD(HTTP_SNS_UV_INDEX, str_uvrisk, str_uvrisk_text); WSContentSend_PD(HTTP_SNS_UV_POWER, str_uvpower); #endif // USE_WEBSERVER } } /*********************************************************************************************\ * Interface \*********************************************************************************************/ bool Xsns11(uint8_t function) { if (!I2cEnabled(XI2C_12)) { return false; } bool result = false; if (FUNC_INIT == function) { Veml6070Detect(); } else if (veml6070_type) { switch (function) { case FUNC_EVERY_SECOND: Veml6070EverySecond(); // 10..15[ms], tested with OLED display, do all the actions needed to get all sensor values break; case FUNC_JSON_APPEND: Veml6070Show(1); break; #ifdef USE_WEBSERVER case FUNC_WEB_SENSOR: Veml6070Show(0); break; #endif // USE_WEBSERVER } } return result; } #endif // USE_VEML6070 #endif // USE_I2C