Esp-01 01s -

Once connected:

DHT dht(DHTPIN, DHTTYPE); WiFiClient espClient; PubSubClient client(espClient); esp-01 01s

GPIO0, GPIO2 (both with external 10k pull-ups if original ESP-01). Once connected: DHT dht(DHTPIN

void loop() float h = dht.readHumidity(); float t = dht.readTemperature(); client.publish("sensor/temp", String(t).c_str()); delay(30000); float t = dht.readTemperature()

| Mode | GPIO0 | GPIO2 | GPIO15 | |------|-------|-------|--------| | UART Download (Flash) | LOW | HIGH | LOW | | Flash Boot (Run) | HIGH | HIGH | LOW | | SDIO/SPI Boot | ? | ? | HIGH (invalid for ESP-01) |

void setup() dht.begin(); WiFi.begin("SSID", "PASS"); client.setServer("192.168.1.100", 1883);

void loop() digitalWrite(LED, LOW); // on delay(1000); digitalWrite(LED, HIGH); delay(1000);