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73 lines
2.7 KiB
C++
73 lines
2.7 KiB
C++
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#include "configuration.h"
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#if !MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR && __has_include(<Adafruit_LTR390.h>)
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#include "../mesh/generated/meshtastic/telemetry.pb.h"
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#include "LTR390UVSensor.h"
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#include "TelemetrySensor.h"
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#include <Adafruit_LTR390.h>
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LTR390UVSensor::LTR390UVSensor() : TelemetrySensor(meshtastic_TelemetrySensorType_LTR390UV, "LTR390UV") {}
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int32_t LTR390UVSensor::runOnce()
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{
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LOG_INFO("Init sensor: %s", sensorName);
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if (!hasSensor()) {
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return DEFAULT_SENSOR_MINIMUM_WAIT_TIME_BETWEEN_READS;
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}
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status = ltr390uv.begin(nodeTelemetrySensorsMap[sensorType].second);
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ltr390uv.setMode(LTR390_MODE_UVS);
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ltr390uv.setGain(LTR390_GAIN_18); // Datasheet default
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ltr390uv.setResolution(LTR390_RESOLUTION_20BIT); // Datasheet default
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return initI2CSensor();
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}
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void LTR390UVSensor::setup() {}
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bool LTR390UVSensor::getMetrics(meshtastic_Telemetry *measurement)
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{
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LOG_DEBUG("LTR390UV getMetrics");
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// Because the sensor does not measure Lux and UV at the same time, we need to read them in two passes.
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if (ltr390uv.newDataAvailable()) {
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measurement->variant.environment_metrics.has_lux = true;
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measurement->variant.environment_metrics.has_uv_lux = true;
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if (ltr390uv.getMode() == LTR390_MODE_ALS) {
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lastLuxReading = 0.6 * ltr390uv.readALS() / (1 * 4); // Datasheet page 23 for gain x1 and 20bit resolution
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LOG_DEBUG("LTR390UV Lux reading: %f", lastLuxReading);
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measurement->variant.environment_metrics.lux = lastLuxReading;
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measurement->variant.environment_metrics.uv_lux = lastUVReading;
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ltr390uv.setGain(
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LTR390_GAIN_18); // Recommended for UVI - x18. Do not change, 2300 UV Sensitivity only specified for x18 gain
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ltr390uv.setMode(LTR390_MODE_UVS);
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return true;
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} else if (ltr390uv.getMode() == LTR390_MODE_UVS) {
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lastUVReading = ltr390uv.readUVS() /
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2300.f; // Datasheet page 23 and page 6, only characterisation for gain x18 and 20bit resolution
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LOG_DEBUG("LTR390UV UV reading: %f", lastUVReading);
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measurement->variant.environment_metrics.lux = lastLuxReading;
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measurement->variant.environment_metrics.uv_lux = lastUVReading;
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ltr390uv.setGain(
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LTR390_GAIN_1); // x1 gain will already max out the sensor at direct sunlight, so no need to increase it
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ltr390uv.setMode(LTR390_MODE_ALS);
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return true;
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}
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}
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// In case we fail to read the sensor mode, set the has_lux and has_uv_lux back to false
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measurement->variant.environment_metrics.has_lux = false;
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measurement->variant.environment_metrics.has_uv_lux = false;
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return false;
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}
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#endif
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