Cài đặt Arduino và thư viện Esp32 / Era eoh
Cài đặt thư viện DHT20 nhiệt độ, độ ẩm
Sketch > Include Library > Manage Libraries
Trong mục search, điền vào dht20
Chọn install thư viện thứ 2 DHT20 by Rob Tillaart
Source code
ERaTimer::iterator timer1;
const uint8_t buzzerPin = 13;
const uint8_t rainPin = 34;
const uint8_t co2Pin = 33;
const uint8_t soilPin = 32;
const int thresholdSoil = 70;
const int thresholdRain = 2500;
void alarmTone() {
static bool on = false;
if (on = !on) {
tone(buzzerPin, 1500);
}
else {
noTone(buzzerPin);
}
}
void rainMeas() {
bool state = (analogRead(rainPin) < thresholdRain);
ERa.virtualWrite(V0, state);
}
void co2Meas() {
float rLoad = 10.0f;
float rZero = 5869.51f;
float paramA = 116.6f;
float paramB = -2.77f;
float resistance = (((4095.0f / analogRead(co2Pin)) - 1.0f) * rLoad);
float ppm = (paramA * pow((resistance / rZero), paramB));
ERa.virtualWrite(V1, isnan(ppm) ? 0.0f : ppm);
}
void soilMeas() {
uint8_t percentage = -ERaMapNumberRange((int)analogRead(soilPin), 2000, 2700, -100, 0);
bool alarm = (percentage >= thresholdSoil);
if (alarm) {
timer1.enable();
}
else {
noTone(buzzerPin);
timer1.disable();
}
ERa.virtualWrite(V2, percentage);
ERa.virtualWrite(V3, alarm);
}
/* This function print uptime every second */
void timerEvent() {
rainMeas(); co2Meas(); soilMeas();
ERA_LOG("Timer", "Uptime: %d", ERaMillis() / 1000L);
}
void setup() {
/* Setup debug console */
Serial.begin(115200);
/* Setup GPIO */
pinMode(rainPin, ANALOG);
pinMode(co2Pin, ANALOG);
pinMode(soilPin, ANALOG);
setToneChannel(8);
tone(buzzerPin, 0, 1000);
/* Initializing the ERa library. */
ERa.begin(ssid, pass);
/* Setup timer called function every second */
timer.setInterval(1000L, timerEvent);
timer1 = timer.setInterval(500L, alarmTone);
timer1.disable();
}
void loop() {
ERa.run();
timer.run();
}
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