DHT22 Demo

Source: temperature_dht22_demo.ino
Prerequisites: DHT22 + DHT sensor library + Adafruit Unified Sensor.
Shows: temperature/humidity reads, fixed-point conversion, telemetry transaction.

Code


float h = dht.readHumidity();
float t = dht.readTemperature();
 
int64_t tempX100 = (int64_t)(t * 100.0f);
int64_t humidityX100 = (int64_t)(h * 100.0f);
 
Instruction ix;
ix.setProgram(programId);
ix.addKey(authorityPub, true, true);
ix.addKey(dataAccountPda, false, true);
ix.writeBytes(RECORD_DATA_DISCRIMINATOR, 8);
ix.writeI64LE(tempX100);
ix.writeI64LE(humidityX100);