2022-09-02 12:13:47 +01:00
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/*
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xsns_99_luxv30b.ino - Driver for DFRobot V30B lux sensor
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Copyright (C) 2022 Marius Bezuidenhout
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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_LUXV30B
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/**************************************************************************************************
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* DFRobot SEN0390 V30B ambient light sensor
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*
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* https://wiki.dfrobot.com/Ambient_Light_Sensor_0_200klx_SKU_SEN0390
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* https://github.com/DFRobot/DFRobot_B_LUX_V30B/
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*
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* I2C Address: 0x4A
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* ================================================================================================
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* This driver use the I2C mode. Uses address 0x94 and 0x95. Its address cannot be changed.
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*
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* Supply Voltage: 2.7-6V
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* Operating Current: 0.7mA
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* Detection Range: 0-200klx
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* Accuracy: 0.054lx
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* Operating Temperature Range: -40°C~+85°C
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* I2C Address: 0x4A
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*
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* Pin assignments:
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*
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* ------------------------------------------
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* | Num | Label | Description |
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* 1 VCC 2.7-6V +
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* 2 SCL I2C Serial Clock Line
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* 3 SDA I2C Serial Data
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* 4 GND Ground
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* 5 EN Sensor Chip-select Enable/Disable port, High to enable, Low to disable sensor
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*
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*
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* You can write the desired configuration to the configuration register(address:0x04), setting
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* different acquisition accuracy.
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* You can read the light intensity data from the data register(address:0x00~0x03).
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* ------------------------------------------------------------------------------------------
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* | b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0 |
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* ------------------------------------------------------------------------------------------
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* | 0 | MANUAL | 0 | 0 | CDR | TIM |
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* ------------------------------------------------------------------------------------------
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* MANUAL ：Manual configuration register.
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* 0 represents the default automatic mode.In this mode ,CDR and TIM are automatically assigned.
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* 1 represents the configuration of manual mode.In this mode,CDR and TIM can be set by the user.
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* CDR ：Shunt ratio register.
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* 0 represents the default of not dividing,all the current of the photodiode into the ADC
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* 1 represents the division of 8,as long as 1/8 of the current of the photodiode changes to ADC.
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* This mode is used in high brightness situations.
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* TIM[2:0]：Acquisition time.
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* ------------------------------------------------------------------------------------------------
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* TIM[2:0] | TIME（ms） | Introduction |
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* ------------------------------------------------------------------------------------------------
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* 000 | 800 | Preferred mode in low light environment |
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* ------------------------------------------------------------------------------------------------
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* 001 | 400 | --- |
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* ------------------------------------------------------------------------------------------------
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* 010 | 200 | --- |
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* ------------------------------------------------------------------------------------------------
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* 011 | 100 | In the strong light environment, select the mode preferentially |
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* ------------------------------------------------------------------------------------------------
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* 100 | 50 | Manual mode only |
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* ------------------------------------------------------------------------------------------------
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* 101 | 250 | Manual mode only |
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* ------------------------------------------------------------------------------------------------
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* 110 | 12.5 | Manual mode only |
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* ------------------------------------------------------------------------------------------------
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* 111 | 6.25 | Manual mode only |
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* ------------------------------------------------------------------------------------------------
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* Accuracy that can be set in manual mode:
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* -------------------------------------------------------------------------------------------------------------
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* | Light conditions | | TIM & CDR |
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* -------------------------------------------------------------------------------------------------------------
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* | Minimum accuracy | Maximum accuracy | Maximum | Acquisition time(ms) | TIM | CDR |
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* —------------------------------------------------------------------------------------------------------------
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* 0.054 11.52 2938 800 000 0
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* 0.09 23.04 5875 400 001 0
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* 0.18 46.08 11750 200 010 0
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* 0.36 92.16 23501 100 011 0
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* 0.36 92.16 23501 800 000 1
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* 0.72 184.32 47002 50 100 0
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* 0.72 184.32 47002 400 001 1
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* 1.44 368.64 94003 25 101 0
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* 1.44 368.64 94003 200 010 1
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* 2.88 737.28 200000 12.5 110 0
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* 2.88 737.28 200000 100 011 1
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* 5.76 737.28 200000 6.25 111 0
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* 5.76 737.28 200000 50 100 1
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* 11.52 737.28 200000 25 101 1
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* 23.04 737.28 200000 12.5 110 1
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* 46.08 737.28 200000 6.25 111 1
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* —------------------------------------------------------------------------------------------------------------
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* *************************************************************************************************/
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#define XSNS_99 99
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#define XI2C_70 70 // See I2CDEVICES.md
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#define LUXV30B_ADDR 0x4A // Two wire library uses 7-bit addresses throughout
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#define LUXV30B_DATAREG 0x00 // Address of the data register
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#define LUXV30B_CONFREG 0x04 // Address of the configuration register
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class LuxV30b {
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public:
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LuxV30b();
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void Detect();
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bool Found();
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void Read();
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void Show(uint8_t function);
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private:
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float Lux();
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bool _found;
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uint32_t _lux;
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2022-09-04 13:48:58 +01:00
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uint32_t _lux_last;
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2022-09-02 12:13:47 +01:00
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};
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LuxV30b::LuxV30b() {
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_found = false;
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_lux = 0;
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}
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void LuxV30b::Detect() {
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if (!I2cSetDevice(LUXV30B_ADDR)) { return; }
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_found = true;
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I2cSetActiveFound(LUXV30B_ADDR, "LUXV30B");
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}
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bool LuxV30b::Found() {
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return _found;
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}
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void LuxV30b::Read() {
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2022-09-04 13:48:58 +01:00
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uint32_t lux = I2cRead8(LUXV30B_ADDR, 0);
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// delay(8);
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lux |= I2cRead8(LUXV30B_ADDR, 1) << 8;
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// delay(8);
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lux |= I2cRead8(LUXV30B_ADDR, 2) << 16;
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// delay(8);
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lux |= I2cRead8(LUXV30B_ADDR, 3) << 24;
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_lux = (lux > (_lux_last << 4)) ? _lux_last : lux; // Filter large deviations due to misreads
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_lux_last = lux;
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// AddLog(LOG_LEVEL_DEBUG, PSTR("SCD: Raw %d/%d"), lux, _lux);
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2022-09-02 12:13:47 +01:00
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}
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float LuxV30b::Lux() {
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return ((float)_lux * 1.4) / 1000;
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}
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void LuxV30b::Show(uint8_t function) {
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// if (0 < Lux()) {
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if (_lux) {
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char lux[FLOATSZ];
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dtostrfd(Lux(), 2, lux);
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if (FUNC_JSON_APPEND == function) {
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ResponseAppend_P(PSTR(",\"LUXV30B\":{\"" D_JSON_ILLUMINANCE "\":%s}"), lux);
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#ifdef USE_DOMOTICZ
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// Instead of below code use a rule like 'on tele-luxv30b#illuminance do dzsend1 9988,%value% endon'
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// where 9988 is the domoticz sensor Idx
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// if (0 == TasmotaGlobal.tele_period) { DomoticzSensor(DZ_ILLUMINANCE, lux); }
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#endif // USE_DOMOTICZ
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#ifdef USE_WEBSERVER
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} else {
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WSContentSend_PD(PSTR("{s}LUXV30B " D_ILLUMINANCE "{m}%s " D_UNIT_LUX "{e}"), lux);
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#endif // USE_WEBSERVER
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}
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}
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}
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LuxV30b Luxv30b;
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/*********************************************************************************************\
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* Interface
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\*********************************************************************************************/
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bool Xsns99(uint8_t function) {
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if (!I2cEnabled(XI2C_70)) { return false; }
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bool result = false;
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if (FUNC_INIT == function) {
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Luxv30b.Detect();
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}
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else if (Luxv30b.Found()) {
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switch (function) {
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case FUNC_EVERY_SECOND:
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Luxv30b.Read();
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break;
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case FUNC_JSON_APPEND:
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#ifdef USE_WEBSERVER
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case FUNC_WEB_SENSOR:
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#endif // USE_WEBSERVER
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Luxv30b.Show(function);
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break;
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}
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}
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return result;
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}
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#endif // USE_LUXV30B
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#endif // USE_I2C
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