{"NAME":"MagTag","GPIO":[0,1376,0,4705,4704,0,0,0,0,0,1,35,34,288,33,32,3840,480,1,0,0,3872,608,608,864,896,832,0,0,0,0,0,0,0,0,0],"FLAG":0,"BASE":1}

An ESP32-S2 dev board with a 2.9” E-Paper display, various peripherals, and standard GPIO/I2C connectors for rapid prototyping.

This board uses an ESP32-S2-WROVER module with 4 MB flash and 2 MB PSRAM.

When the board is booted into debug by holding BOOT and pressing the RESET button the USB port exposes a serial connection. This can be used to easily flash new firmware.

Flashing

Flash using Tasmota Web Installer and select Tasmota ESP32-S2 option.

For esptool.py download i.e. tasmota32s2.factory.bin and run esptool.py write_flash 0x0 tasmota32s2.factory.bin

To put ESP32-S2 in flash mode GPIO0 needs to be pulled low.

Device Notes

Product Guide

Schematic

Peripherals

• 2.9” 291x128 SPI E-Paper Display (IL0373 controller)
  • Not currently supported by Tasmota
• 4x Front Panel User Buttons
  • On GPIO11-12 and GPIO14-15 (configured as Button 1-4, left to right)
• 4x WS2812B Neopixel
  • On GPIO1 (configured as WS2812) with power on GPIO21 (configured as Output Low).
• Back panel red status LED
  • On GPIO13 (configured as LED 1)
• Analog light sensor
  • On GPIO3 (configured as Analog 2) with power on GPIO21 (already set to Output Low for NeoPixels)
• PWM-capable Buzzer
  • On GPIO17 (configured as Buzzer) with power/enable on GPIO16 (configured as Output Hi).
  • Use BuzzerPWM console command to switch to PWM mode
• 3-axis Accelerometer ((LIS3DH](https://www.st.com/resource/en/datasheet/lis3dh.pdf))
  • On I2C bus, interrupt on GPIO9 (not currently supported by Tasmota)
• 2x 3-pin STEMMA JST-PH GPIO connectors
  • On GPIO18 (A1) and GPIO10 (D10) (both configured as User for setup via module)
• STEMMA-QT JST-SH I2C bus connector
  • Both ports share the same bus, on GPIO33 (SCL) and GPIO34 (SDA) (configured as I2C 1).
• 1S LiPo battery management subsystem with 2-pin JST-PH connector
  • Battery voltage divider on GPIO4 (configured as Analog 1)