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48 lines
2.3 KiB
Markdown
48 lines
2.3 KiB
Markdown
# ESP-Nodes
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Eco-system of ESP32s Nodes and ATtiny85 peripherals with different functionalities.
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<p>The ESP32-Node is designed to be a low-cost, vanila solution for experimenting with embedded and IoT devices. The ESP32-Node is intended to College students taking Electronics program or advanced users who are looking for functional ESP32 embedded board with minimal size.</p>
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<img alt="ESP32-Node PCB" src="https://github.com/alexandrebobkov/ESP-Nodes/blob/main/assets/ESP32-Node-001.jpg" width="50%"/>
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<p><i>ESP32-Node Features:</i></p>
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- ESP32-WROOM-32D Module [^1]
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- Direct connections to all GPIOs
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- Miniature in size, only 35.7mm x 35.7mm
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- Built-in 3V3 voltage regulator (15V input max) and reversed supply voltage polarity protection
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- Pre-wired strapping pins for ensuring proper booting on power-on
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- blue power-on LED
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- two programmable LEDs
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- programmable via [UART](https://github.com/alexandrebobkov/ESP-Nodes/tree/main?tab=readme-ov-file#uart) -> no need for serial drivers
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### ESP32 Module Adapter Pinouts
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<p>The adapter allows interchangability of ESP32 modules between different nodes.</p>
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<img alt="ESP32-Node Pinout" src="https://github.com/alexandrebobkov/ESP-Nodes/blob/main/assets/ESP32-Node-pinout.png" width="350px"/>
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| Physical Pin | Descrption and Logical Pin | Extended Function |
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| --- | --- | --- |
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| `1` `15` `38` | Ground | |
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| `2` | `3V3` | |
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| `3` | EN | |
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| `4` `5` `6` `7` | **Inputs Only** `GPIO36` `GPIO39` `GPIO34` `GPIO35` | ADC1_CH0, ADC1_CH3, ADC1_CH6, ADC1_CH7 |
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| `8` `9` | `GPIO32` `GPIO33` | TOUCH_9, TOUCH_8 |
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| `10` `11` | `GPIO25` `GPIO26` | DAC_1, DAC_2 |
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| `12` | `GPIO27` | TOUCH_7 |
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| `13` `14` | `GPIO14` `GPIO12` | `HSPI_CLK` `HSPI_MISO` TOUCH_6 TOUCH_7 |
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| `16` | `GPIO13` | `HSPI_MOSI` ADC2_CH4 |
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| `17` `18` `19` `20` `21` `22` | **Module Internal Use Only** `GPIO09` `GPIO10` `GPIO11` `GPIO08` `GPIO07` `GPIO06` |
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| `23` `24` | `GPIO02` `GPIO15` | AD2_CH3 ADC2_CH2 |
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| `25` `26` | `GPIO00` `GPIO04` | TOUCH_1 TOUCH_0 |
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| `27` `28` | `GPIO16` `GPIO17` | `UART2_RXD` `UART2_TXD` |
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| `29` `30` `31` | `GPIO05` `GPIO18` `GPIO19` | `VSPI_CS0` `VSPI_CLK` `VSPI_MISO` |
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| `32` | Not Connected |
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| `33` | `GPIO21` | `SDA` |
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| `34` `35` | `GPIO03` `GPIO01` | UART0_RXD UART0_TXD |
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| `36` | `GPIO22` | `SCL` |
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| `37` | `GPIO23` | VSPI_MOSI |
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[^1]: https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf
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## UART |