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RELAY_ESP32S3.MD

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✨ LilyGO T-Relay S3 ✨

English | 中文

1️⃣ Examples preview


examples 
├─DS18x20_Temperature          # External DS18B20 Example，The default is that there is no such sensor, which requires an external connection
├─HomeAssistant                # Example of easy configuration for accessing Home Assistant+OLED SS1306
├─NimBLE_Server                # uses BLE to control the relay
├─RTC_DS3231_External_Module   # using DS3231 External RTC module
├─RTC_PCF8563_TimeSynchronization    # using On board PCF8563 RTC 
├─TFT_ESPI                     # using a 2.4 'inch resistive touch screen
└─UnitTestExample              # Test program

2️⃣ Quick Start

PlatformIO

  1. Install VisualStudioCode and Python
  2. Search for the PlatformIO plugin in the VisualStudioCode extension and install it.
  3. After the installation is complete, you need to restart VisualStudioCode
  4. After restarting VisualStudioCode, select File in the upper left corner of VisualStudioCode -> Open Folder -> select the LilyGo-T-Relay directory
  5. Click on the platformio.ini file, and in the platformio column, cancel the sample line that needs to be used, please make sure that only one line is valid
  6. Click the (✔) symbol in the lower left corner to compile
  7. Connect the board to the computer USB
  8. Click (→) to upload firmware
  9. Click (plug symbol) to monitor serial output

ArduinoIDE

  1. Install ArduinoIDE
  2. Copy all the folders in the LilyGo-T-Relay/lib directory to <C:\Users\UserName\Documents\Arduino\libraries>. If there is no libraries directory, please create a new one. Please note that you are not copying the lib directory, but copying the folders in the lib directory
  3. Open ArduinoIDE -> Tools
  • Board -> ESP32S3 Dev Module
  • USB CDC On Boot -> Enable
  • CPU Frequency -> 240MHz
  • USB DFU On Boot -> Disable
  • Flash Mode -> QIO 80MHz
  • Flash Size -> 16MB(128Mb)
  • USB Firmware MSC On Boot -> Disable
  • PSRAM -> OPI PSRAM
  • Partition Scheme -> 16M Flash(3MB APP/9.9MB FATFS)
  • USB Mode -> Hardware CDC and JIAG
  • Upload Mode -> UART0/Hardware CDC
  • Upload Speed -> 921600

3️⃣ Tips:

  1. ⚠T-Relay uses Octal SPI Flash, so GPIO35 ~ GPIO37 are not available, please do not use these IOs in the software
  2. ⚠T-Relay 3v3* The maximum external current allowed is 500mA, please do not exceed this supply current
  3. ⚠T-Relay 5V Pin The maximum allowable current is 3000mA, ESP32S3 and other external components require nearly 800mA current, so please do not connect external components greater than 2000mA
  4. ⚠T-Relay The maximum allowable current for electric shock on relay pins is 10A load current, please do not connect load devices exceeding 2500W
  5. ⚠If an external relay load greater than 48V is connected, please power off the main board and connected equipment first to prevent electric shock.
  6. ⚠T-Relay is a serial-to-parallel design for 74HC595, allowing multiple T-Relay sub-boards to be connected, but please note that due to the design of the power supply of the main board, it is currently recommended that cascaded devices not More than 3 relay sub-boards, cascading three sub-boards, the power supply of the main board will be hot, which is normal, please do not touch it with your hands to prevent burns. If you work for a long time, it is recommended to paste a heat sink on the inductor of the power supply to assist the main board to dissipate heat.
  7. ⚠ The DS18B20 sensor interface is reserved by default, and there is no such sensor by default
  8. External reserved expansion screen interface Support TFT Module Link , Relay-S3 default design size is 2.4 inches
  9. The board uses USB as the JTAG upload port. When printing serial port information on USB_CDC_ON_BOOT configuration needs to be turned on. If the port cannot be found when uploading the program or the USB has been used for other functions, the port does not appear. Please enter the upload mode manually.
    1. Connect the board via the USB cable
    2. Press and hold the BOOT button , While still pressing the BOOT button, press RST
    3. Release the RST
    4. Release the BOOT button
    5. Upload sketch

4️⃣ ESP32S3 Pins:

Shift register DATA CLOCK LATCH
GPIO 7 5 6
RTC SDA SCL IRQ
GPIO 16 17 18

5️⃣ Shift register hardware distribution:

Relay Channel CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
GPIO SR1 SR2 SR3 SR4 SR5 SR6 GREEN LED RED LED