Does this board have esp32 chip included on the dev board or is this meant to sit on top of an esp32 dev board like a wroom or similar?

This development board already contains esp32 chip, you can refer to the detailed picture for the location of the chip

Do you sell a replacement lcd screen? I didn't realize how fragile they are and I cracked mine.

Dear customer, we have LCD screens sold separately. You can replace them. Please contact the customer service team for details jialing@lilygo.cc Thank you

This is not ESP32-S3, ESP32-S3 is amazon.com/dp/B0B7X5RVTH?ref=myi_title_dp

How do the mcus communicate between each other? is there example using i2c or spi or can? no point in buying two mcus and use only one

The MCUs would communicate with each other via WiFi or Bluetooth. I2C, SPI and can are used to communicate with peripherals such as sensors or displays. One could have devices with temperature/humidity sensors at different places in your environment using the on-board display to show the temperature at that location and have the device send the values to a central location periodically.

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🚀 Elevate your Arduino game with vivid display & powerful ESP32 connectivity!

MODERN USB TYPE C PORT - Fast, reversible, and future-proof connectivity.
MASSIVE 16 MB FLASH MEMORY - Store complex projects and firmware with ease.
ULTRA LOW POWER SLEEP MODE - Only 350µA sleep current to maximize battery life.
VIBRANT 1 14 INCH IPS DISPLAY - Crisp visuals for real-time data and UI feedback.
SEAMLESS WI FI BLE INTEGRATION - Effortlessly connect your IoT projects to the cloud.

The LILYGOTTGO T-Display is a compact ESP32 development board featuring a sharp 1.14-inch IPS ST7789V LCD, 16MB flash memory, and USB Type-C interface. Designed for Arduino enthusiasts, it offers low power consumption with 67mA working current and 350µA sleep current, making it ideal for advanced IoT and embedded projects.

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Standing screen display size	1.14
Processor	others
Wireless Type	802.11b, Bluetooth
Brand	LILYGO
Series	Q125
Item model number	T-Display 16MB CH9102F
Operating System	Mac,Mac System,Windows
Item Weight	0.704 ounces
Product Dimensions	4.25 x 2.68 x 1.14 inches
Item Dimensions LxWxH	4.25 x 2.68 x 1.14 inches
Number of Processors	2
Computer Memory Type	Shared
Manufacturer	LILYGO®
ASIN	B099MPFJ9M
Date First Available	July 16, 2021

LILYGOTTGO T-Display ESP32 WiFi BLE Module Development Board for Arduino 1.14 Inch LCD

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