Task 3 - Interfacing RTC time module with ESP32
Objective:
Our main task was to display Real time data on a OLED using DS3231 (RTC) module along with ESP32.
The list of Components that I used To perform this task include:
ESP32
RTC DS3231 module
Oled
jumper wires
Breadboard
1.The DS3231 & the OLED Display both are I2C Module. So we just need 2 pins for connection. So, I have connected the Serial Data (SDA) pins to ESP32 GPIO21 pin & Serial Clock (SCL) to ESP32 GPIO22 pin. Supply 3.3V to OLED & RTC Module through 3.3V pin of ESP32.
2.A precision temperature-compensated voltage reference and comparator circuit monitor the status of VCC to detect power failures, to provide a reset output, and to automatically switch to the backup supply when necessary.
Task 8 - Alexa Light Control
Objective:
Our main task was to turn on leds by sending instructions/commands to alexa or any other communication protocol
Below figure shows The process of Controlling Lights through Alexa and ESP32 :
WORKING :
1.Voice Command: You say, "Alexa, turn on LED."
2.Echo Dot: Receives the voice command and sends it to Alexa's cloud service.
3.Alexa (Echo dot): Processes the command and triggers an action linked to the ESP32.
4.Communication: Alexa communicates with the ESP32 via Wi-Fi using MQTT/HTTP.
MQTT (Message Queuing Telemetry Transport): A lightweight messaging protocol often used for IoT devices, allowing efficient communication over low-bandwidth networks.
5.ESP32 Processing: ESP32 receives the command and processes it.
6.GPIO Control: ESP32 controls a GPIO pin to turn the LED on or off.
7.LED Activation: The LED turns on or off based on the GPIO pin's state.
Task 2 - Introduction to RFID
Objective:
The main objective we had was to read a RFID (radio frequency Identification).
The components That I used to perform the above mentioned task include :
ESP32: Since arduino are not featured with bluetooth, wi-fi etc , Esp32 is used .
RFID (Radio Fequency Identification)
Leds (to display the visual output)
Breadboard .
WORKING
1.RFID Reader Module: Connected to the ESP32 via SPI or I2C for communication.
2.Power and Initialization: ESP32 powers the RFID reader and initializes communication.
3.Card Detection: The RFID reader generates an electromagnetic field, and the card transmits its UID when in range.
4.UID Transmission: RFID reader captures the card's UID and sends it to the ESP32.
5.Data Processing: ESP32 processes the UID, possibly comparing it with a list of authorized UIDs.
6.Action Trigger: Based on the UID, the ESP32 triggers an action (e.g., unlocking a door, turning on a device).
7.Continuous Monitoring: ESP32 loops back to monitor for more RFID cards.
