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README.md

@@ -1,7 +1,7 @@
 # ESP-Nodes
 Eco-system of ESP32s Nodes and ATtiny85 peripherals with different functionalities.
 
-<p>The ESP32-Node is designed to be a low-cost, vanila, solution for experimenting with embedded and IoT devices. The ESP32-Node is intended to College students taking Electronics program or advanced users who are looking for functional ESP32 embedded board with minimal size.</p>
+<p>The ESP32-Node is designed to be a low-cost, vanila solution for experimenting with embedded and IoT devices. The ESP32-Node is intended to College students taking Electronics program or advanced users who are looking for functional ESP32 embedded board with minimal size.</p>
 
 <img alt="ESP32-Node PCB" src="https://github.com/alexandrebobkov/ESP-Nodes/blob/main/assets/ESP32-Node-001.jpg" width="50%"/>
 
@@ -16,7 +16,8 @@ Eco-system of ESP32s Nodes and ATtiny85 peripherals with different functionaliti
 - two programmable LEDs
 - programmable via [UART](https://github.com/alexandrebobkov/ESP-Nodes/tree/main?tab=readme-ov-file#uart) -> no need for serial drivers
 
-### Pinouts
+### ESP32-WROOM-32D Module Adapter Pinouts
+<p>The adapter allows interchangability of ESP32 modules between different nodes. The adapter contains minimal components on its PCB, just enough to ensure module's operation.</p>
 
 <img alt="ESP32-Node Pinout" src="https://github.com/alexandrebobkov/ESP-Nodes/blob/main/assets/ESP32-Node-pinout.png" width="350px"/>
 
@@ -44,4 +45,26 @@ Eco-system of ESP32s Nodes and ATtiny85 peripherals with different functionaliti
 
 [^1]: https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf
 
-## UART
+
+### UART
+
+## Temperature Node Key Elements and Components
+
+The **Temperature Node** broadcasts the air temperature, atmospheric pressure and air humidity over secured MQTT.
+
+### I2C Air Temperature, Pressure and Humidity Sensor Board (BME280)
+
+The sensor board is 13mm by 10.5mm in size that provides the air temperature, pressure and humidity values over I2C protocol. Sensor board uses **BME280** IC.
+
+<img alt="ESP32-Node Pinout" src="https://github.com/alexandrebobkov/ESP-Nodes/blob/main/assets/BME280.jpg" width="200px"/>
+
+> [!IMPORTANT]
+> BM**E**280[^2] and BM**P**280[^3] look almost identical. However, BME280 sensor has a square form, while BMP280 has a rectangular form. In addition, the two sensor boards have different I2C addresses.
+>
+> <img alt="ESP32-Node Pinout" src="https://github.com/alexandrebobkov/ESP-Nodes/blob/main/assets/BME280-BMP280.jpg" width="100px"/>
+
+
+### Wiring
+
+[^2]: https://www.bosch-sensortec.com/products/environmental-sensors/pressure-sensors/bmp280/
+[^3]: https://www.bosch-sensortec.com/products/environmental-sensors/pressure-sensors/bmp280/