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Minor UART accuracy fixes
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content/hardware/03.nano/boards/nano-esp32/tech-specs.yml

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@@ -13,7 +13,7 @@ Connectivity:
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Wi-Fi®: u-blox® NORA-W106 (ESP32-S3)
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Bluetooth®: u-blox® NORA-W106 (ESP32-S3)
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Communication:
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UART: 1x, D0 (TX), D1, (RX)
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UART: 2x
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I2C: 1x, A4 (SDA), A5 (SCL)
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SPI: D11 (COPI), D12 (CIPO), D13 (SCK). Use any GPIO for Chip Select (CS).
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Power:

content/hardware/03.nano/boards/nano-esp32/tutorials/cheat-sheet/cheat-sheet.md

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author: 'Karl Söderby'
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---
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The **Arduino Nano ESP32** is the first Arduino to feature an ESP32 SoC, based on the [ESP32-S3](https://www.espressif.com/en/products/socs/esp32-s3). This SoC is found inside the **u-blox® NORA-W106** module and provides both Bluetooth® & Wi-Fi® connectivity, as well as embedding an antenna.
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The **Arduino Nano ESP32** is the first Arduino to feature an ESP32 SoC as its main microcontroller, based on the [ESP32-S3](https://www.espressif.com/en/products/socs/esp32-s3). This SoC is found inside the **u-blox® NORA-W106** module and provides both Bluetooth® & Wi-Fi® connectivity, as well as embedding an antenna.
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![Nano ESP32 overview](assets/nano-esp32-overview.png)
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@@ -149,16 +149,16 @@ The Nano ESP32 has 14 digital pins (D0-D13), that can be read by using `digitalR
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| D12/CIPO | Digital | **SPI** Controller In Peripheral Out |
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| D11/COPI | Digital | **SPI** Controller Out Peripheral In |
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| D10 | Digital | GPIO |
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| D9 | Digital | GPIO |
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| D8 | Digital | GPIO |
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| D9 | Digital | GPIO & RX1 |
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| D8 | Digital | GPIO & TX1 |
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| D7 | Digital | GPIO |
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| D6 | Digital | GPIO |
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| D5 | Digital | GPIO |
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| D4 | Digital | GPIO |
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| D3 | Digital | GPIO |
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| D2 | Digital | GPIO |
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| D0/RX | Digital | GPIO 0 / **UART** Receiver (RX) |
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| D1/TX | Digital | GPIO 1 / **UART** Transmitter (TX) |
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| D0/RX | Digital | GPIO 0 / **UART** Receiver (RX0) |
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| D1/TX | Digital | GPIO 1 / **UART** Transmitter (TX0) |
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Note that all analog pins can be used as digital pins as well, but not vice versa.
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![Boot pins.](assets/nano-esp32-boot.png)
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Shorting these to GND + pressing the reset button will enter a bootloader mode. Note that while shorting these pins, a corresponding LED will light up (blue for )
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Shorting these to GND + pressing the reset button will enter a bootloader mode. Note that while shorting these pins, a corresponding Blue LED will light up.
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You can read more about different this in the [Strapping Pins section](https://www.espressif.com/sites/default/files/documentation/esp32-s3_datasheet_en.pdf#page=23) in the ESP32-S3's datasheet.
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