Ollo/HomieRoomSensor
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Do not publish invalid PM2.5 values

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This commit is contained in:
Ollo 2021-12-21 13:18:46 +01:00
parent c0aa9c8da1
commit 33ef6bc21b
1 changed files with 8 additions and 1 deletions
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9
src/main.cpp
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@ -51,6 +51,8 @@
#define BUTTON_MIN_ACTION_CYCLE 55U /**< Minimum cycle to react on the button (e.g. 5 second) */
#define BUTTON_CHECK_INTERVALL 100U /**< Check every 100 ms the button state */
#define PM_MAX 1001 /**< According datasheet https://en.gassensor.com.cn/ParticulateMatterSensor/info_itemid_105.html 1000 is the maximum */
#define LOG_TOPIC "log\0"
#define MQTT_LEVEL_ERROR 1
#define MQTT_LEVEL_WARNING 10
@ -188,7 +190,12 @@ int getSensorData() {
// Header und Prüfsumme checken
if (serialRxBuf[0] == 0x16 && serialRxBuf[1] == 0x11 && serialRxBuf[2] == 0x0B /* && checksum == 0 */)
{
return (serialRxBuf[5] << 8 | serialRxBuf[6]);
int pmValue = (serialRxBuf[5] << 8 | serialRxBuf[6]);
if (pmValue > PM_MAX) {
return (-1);
} else {
return pmValue;
}
}
else
{