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USB UART with both DTR and RTS for ESP MCUs.  The DTR and RTS pins have jumper seletable circuitry to make for smooth uploading to ESPs without having to jump up and down on the buttons or yank jumpers in and out.  DTR goes to Reset and RTS goes to GPIO 0.

Jumpers are provided to deselect ESP mode to allow use of the DTR as Reset for regular AVR MCUs.

The internal regulator of the CP2102 is not really robust enough for larger ESPs like the ESP32-S3...  so this board includes a separate 850mA  3V3 regulator.

Jumper selectable 3V3 or +5V Vcc

micro USB..

Espresif ESP32-WROOM microcontroller

• 240MHz CPU Clock
• 2 main cores - 1 pico power core
• WiFi, BlueTooth
• 26 available GPIOs
• - 0 thru 5 = 6 x I/O
• - 12 thru 19 = 8 x I/O
• - 21 thru 23 = 3 x I/O
• - 25 thru 27 = 3 x I/O
• - 32 thru 33 = 2 x I/O
• - 34, 35, 36, 39 = 4 x Input
• 0.8in spacing between rows
• BreadBoard Friendly
• IOT verison has no LEDs to save battery

Just add "https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json"
to the Arduino IDE File->Preference->Additional Board Manager URLs to add the official expressif Arduino support
Includes many example sketches. Uses freeRTOS..

Espresif ESP32-WROOM-32 microcontroller

• 240MHz CPU Clock
• 2 main cores - 1 pico power core
• WiFi, BlueTooth
• 26 available GPIOs
• - 0 thru 5 = 6 x I/O
• - 12 thru 19 = 8 x I/O
• - 21 thru 23 = 3 x I/O
• - 25 thru 27 = 3 x I/O
• - 32 thru 33 = 2 x I/O
• - 34, 35, 36, 39 = 4 x Input
• 0.9in spacing between rows
• BreadBoard Friendly 1 row each side

Just add "https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json"
to the Arduino IDE File->Preference->Additional Board Manager URLs to add the official expressif Arduino support
Includes many example sketches. Uses freeRTOS..

Espresif ESP32-WROOM-32 microcontroller

• 240MHz CPU Clock
• 2 main cores - 1 pico power core
• WiFi, BlueTooth
• 26 available GPIOs
• IPX connector for external Antenna (included)
• - 0 thru 5 = 6 x I/O
• - 12 thru 19 = 8 x I/O
• - 21 thru 23 = 3 x I/O
• - 25 thru 27 = 3 x I/O
• - 32 thru 33 = 2 x I/O
• - 34, 35, 36, 39 = 4 x Input
• 0.8in spacing between rows
• BreadBoard Friendly
• IOT verison has no LEDs to save battery

Just add "https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json"
to the Arduino IDE File->Preference->Additional Board Manager URLs to add the official expressif Arduino support
Includes many example sketches. Uses freeRTOS..

--- Flaky USB Connection - may require external USB-UART
--- Soldered Pins


Espresif ESP32-WROOM microcontroller

• 240MHz CPU Clock
• 2 main cores - 1 pico power core
• WiFi, BlueTooth
• 26 available GPIOs
• - 0 thru 5 = 6 x I/O
• - 12 thru 19 = 8 x I/O
• - 21 thru 23 = 3 x I/O
• - 25 thru 27 = 3 x I/O
• - 32 thru 33 = 2 x I/O
• - 34, 35, 36, 39 = 4 x Input
• 0.8in spacing between rows
• BreadBoard Friendly
• IOT verison has no LEDs to save battery

Just add "https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json"
to the Arduino IDE File->Preference->Additional Board Manager URLs to add the official expressif Arduino support
Includes many example sketches. Uses freeRTOS..

ESP32-C3-MINI single core RISC-V MCU from Espressif

• 4 Meg Flash
• 400 kbytes SRAM
• 15 GPIOs
• WIFI
• BlueTooth 5

Note: this board uses the internal USB CDC interface connected to the USB-C connector for uploading.
            the Arduino IDE needs to be set to reflect this.  To put the MCU into upload mode you need to
             press and hold the "BOOT" button, then press and release the "EN" button, finally releasing the "RESET"
             after each power on.

ESP32-C3-FH4 single core RISC-V MCU from Espressif

• 4 Meg Flash
• 400 kbytes SRAM
• 15 GPIOs
• WIFI
• BlueTooth 5

Note: this board uses the internal USB CDC interface connected to the USB-C connector for uploading.
            the Arduino IDE needs to be set to reflect this.  To put the MCU into upload mode you need to
             press and hold the "BOOT" button, then press and release the "EN" button, finally releasing the "RESET"
             after each power on.

Our own design - we call it an ESP32-S2 proMINI
ESP32-S2-WROVER microcontroller

• 240MHz Xtensa A7 core
• 1 main core - 1 pico power core
• WiFi, USB OTG Host
• 320 kBytes SRAM
• 4MBytes Flash
• 128 kBytes PROM
• 37 available GPIOs
• - 0 thru 21 = 22 x I/O
• - 26 = 1 x I/O
• - 33 thru 46 = 14 x I/O ( TX0=43, RX0=44 )
• 1.0in spacing between 2 rows of 21 pins

Manual PDF ( 532 pages )

AI-Thinker ESP32-S2-12H DevKit
The 12H is an ESP32-S2 with limited I/O pins
ESP32-S2-12H microcontroller

• 240MHz Xtensa LX7 core
• 1 main core - 1 pico power core
• WiFi, USB OTG Host
• 320 kBytes SRAM
• 4MBytes Flash
• 18 available GPIOs
• IO0,IO1,IO2,IO4,IO5,IO7,IO8,IO9,IO10,IO11
  IO12,IO19,IO20,IO21,IO33,IO34,IO37,IO38
• 1.0in spacing between 2 rows of 21 pins
• on-board NeoPixel on pin 9

NOTE: this board has a design flaw that prevents it from working correctly with the Arduino IDE Serial Monitor. You can upload to it fine.  As a work-around I am including the option of a rev 0.9 version of my CP2102 with RTS ESP-USB-UART board real cheap. (they are real handy for any direct programming of ESPs like an ESP-01S, for example).

Manual PDF ( 18 pages )

Breakout for ESP32S or ESP32D

good for low power IOT projects - no regulator or LEDs

ESP32 not included.