42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
#include <SimpleDHT.h>
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// for DHT22,
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// VCC: 5V or 3V
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// GND: GND
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// DATA: 2
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int pinDHT22 = 2;
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SimpleDHT22 dht22(pinDHT22);
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void setup() {
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Serial.begin(115200);
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}
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void loop() {
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// start working...
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Serial.println("=================================");
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Serial.println("Sample DHT22 with error count");
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int cnt = 0;
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int err_cnt = 0;
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for (;;) {
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cnt++;
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float temperature = 0;
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float humidity = 0;
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int err = SimpleDHTErrSuccess;
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if ((err = dht22.read2(&temperature, &humidity, NULL)) != SimpleDHTErrSuccess) {
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Serial.print("Read DHT22 failed, err="); Serial.print(SimpleDHTErrCode(err));
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Serial.print(","); Serial.print(SimpleDHTErrDuration(err));
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err_cnt++;
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} else {
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Serial.print("DHT22, ");
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Serial.print((float)temperature); Serial.print(" *C, ");
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Serial.print((float)humidity); Serial.print(" RH%");
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}
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Serial.print(", total: "); Serial.print(cnt);
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Serial.print(", err: "); Serial.print(err_cnt);
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Serial.print(", success rate: "); Serial.print((cnt - err_cnt) * 100.0 / (float)cnt); Serial.println("%");
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delay(2500);
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}
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}
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