62 lines
1.3 KiB
C++
62 lines
1.3 KiB
C++
// routines for fetching data from the SDS011-sensor
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// Local logging tag
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static const char TAG[] = __FILE__;
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#include <sds011read.h>
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// UART(2) is unused in this project
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#if (HAS_IF482)
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#error cannot use IF482 together with SDS011 (both use UART#2)
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#endif
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static HardwareSerial sdsSerial(2); // so we use it here
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static SDS011 sdsSensor; // fine dust sensor
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// the results of the sensor:
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float pm25;
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float pm10;
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boolean isSDS011Active;
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// init
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bool sds011_init()
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{
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pm25 = pm10 = 0.0;
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sdsSensor.begin (&sdsSerial, ESP_PIN_RX, ESP_PIN_TX);
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sds011_sleep(); // we do sleep/wakup by ourselves
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return true;
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}
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// reading data:
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void sds011_loop()
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{
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if ( isSDS011Active ) {
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int sdsErrorCode = sdsSensor.read(&pm25, &pm10);
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if (sdsErrorCode) {
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pm25 = pm10 = 0.0;
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ESP_LOGI(TAG, "SDS011 error: %d", sdsErrorCode);
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}
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else {
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ESP_LOGI(TAG, "fine-dust-values: %5.1f,%4.1f", pm10, pm25);
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}
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sds011_sleep();
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}
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return;
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}
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// putting the SDS-sensor to sleep
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void sds011_sleep(void)
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{
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sdsSensor.sleep();
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isSDS011Active = false;
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}
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// start the SDS-sensor
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// needs 30 seconds for warming up
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void sds011_wakeup()
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{
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if ( !isSDS011Active ) {
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sdsSensor.wakeup();
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isSDS011Active = true;
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}
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}
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