1. Introduction
  2. DHT22
    1. Protocol
    2. Data Format
    3. Create Project
    4. Error
    5. Driver Implementation
    6. Timing Utils
    7. Embedded HAL Mock
      1. Explanation
    8. Reading Data
      1. Read Bit
      2. Read Byte
      3. Data Parser
      4. Final Boss
    9. Using with ESP32
  3. MAX7219 LED Display
    1. Why MAX7219
    2. Pin Configuration
      1. 7 Segment
      2. LED Matrix
    3. Data Transfer
      1. Example
    4. Create Project
      1. Usual Setup
    5. Error Handling
      1. Tests
    6. Registers
      1. Decode Mode
      2. Tests
    7. Max7219 Driver
      1. Initialization functions
      2. SPI Communication
      3. Basic control
      4. Digit and Decode
      5. Init function
    8. Using with ESP32
  4. Embedded Graphics
    1. LED Matrix
    2. Dimensions
    3. Draw Target
    4. Flush
    5. Clear Pixels
    6. Using with ESP32
  5. Real Time Clock
    1. RTC HAL
      1. Project Setup
      2. Error Handling
        1. Error Module
      3. Core Traits
        1. Datetime
      4. Control Trait
      5. Square Wave
      6. NV RAM
      7. BCD
    2. DS1307
    3. DS3231
    4. Demo App