ESP8266 ESP-01 ESP-01S DHT11 Temperature Humidity WiFi Module:

The ESP8266 ESP-01/ESP-01S DHT11 Temperature and Humidity WiFi Module is a compact IoT solution combining the ESP8266-01 or ESP-01S WiFi microcontroller with a DHT11 sensor. It’s designed for smart home and IoT projects, enabling remote monitoring of temperature (0–50°C, ±2°C accuracy) and humidity (20–90% RH, ±5% RH accuracy). The module supports 3.7–12V DC power (including 3.7V lithium batteries) and uploads data to a server via WiFi.

Key features:

Main Controller: ESP8266-01 or ESP-01S (some modules may not include the ESP8266, requiring separate purchase).

Sensor: DHT11, a low-cost sensor with a thermistor and humidity-sensing element.

Operating Voltage: 3.7–12V DC, versatile for battery or external power.

Applications: Ideal for smart home systems, environmental monitoring, or IoT projects like web servers or cloud data logging.

Setup and Programming

1.Hardware Connection:

• Insert the ESP-01/ESP-01S into the module’s 2x4 pin header (align with arrow direction).
• Power the module via 3.7–12V DC to VCC and GND (2.54mm pins).
• For programming, connect GPIO_0 to ground to enable programming mode, typically using a USB serial adapter.
• A 4.7kΩ pull-up resistor is recommended between the DHT11 data pin and 3.3V.