// // FILE: dht22_test.ino // AUTHOR: Rob Tillaart // PURPOSE: DHT library test sketch for DHT22 && Arduino // URL: https://github.com/RobTillaart/DHTlib #include dht DHT; #define DHT22_PIN 5 struct { uint32_t total; uint32_t ok; uint32_t crc_error; uint32_t time_out; uint32_t connect; uint32_t ack_l; uint32_t ack_h; uint32_t unknown; } stat = { 0,0,0,0,0,0,0,0}; void setup() { Serial.begin(115200); Serial.println("dht22_test.ino"); Serial.print("LIBRARY VERSION: "); Serial.println(DHT_LIB_VERSION); Serial.println(); Serial.println("Type,\tstatus,\tHumidity (%),\tTemperature (C)\tTime (us)"); } void loop() { // READ DATA Serial.print("DHT22, \t"); uint32_t start = micros(); int chk = DHT.read22(DHT22_PIN); uint32_t stop = micros(); stat.total++; switch (chk) { case DHTLIB_OK: stat.ok++; Serial.print("OK,\t"); break; case DHTLIB_ERROR_CHECKSUM: stat.crc_error++; Serial.print("Checksum error,\t"); break; case DHTLIB_ERROR_TIMEOUT: stat.time_out++; Serial.print("Time out error,\t"); break; case DHTLIB_ERROR_CONNECT: stat.connect++; Serial.print("Connect error,\t"); break; case DHTLIB_ERROR_ACK_L: stat.ack_l++; Serial.print("Ack Low error,\t"); break; case DHTLIB_ERROR_ACK_H: stat.ack_h++; Serial.print("Ack High error,\t"); break; default: stat.unknown++; Serial.print("Unknown error,\t"); break; } // DISPLAY DATA Serial.print(DHT.humidity, 1); Serial.print(",\t"); Serial.print(DHT.temperature, 1); Serial.print(",\t"); Serial.print(stop - start); Serial.println(); if (stat.total % 20 == 0) { Serial.println("\nTOT\tOK\tCRC\tTO\tCON\tACK_L\tACK_H\tUNK"); Serial.print(stat.total); Serial.print("\t"); Serial.print(stat.ok); Serial.print("\t"); Serial.print(stat.crc_error); Serial.print("\t"); Serial.print(stat.time_out); Serial.print("\t"); Serial.print(stat.connect); Serial.print("\t"); Serial.print(stat.ack_l); Serial.print("\t"); Serial.print(stat.ack_h); Serial.print("\t"); Serial.print(stat.unknown); Serial.println("\n"); } delay(2000); } // -- END OF FILE --