Public Access
mangavalkandClaude Opus 5.5
58a7cb03c2
- README is the overview; web UI, pages, Home Assistant, how it works, wiring, Nano over WiFi and the recovery app have their own page in docs/. - docs/web-ui.md has a screenshot of every tab, made with headless Edge by tools/make_webui_screenshots.py. - The web UI opens a page in the editor with #pages/<name>. Version 2.7.2. - The reply wire is fitted (flashing the Nano over WiFi works). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
15 lines
873 B
Markdown
15 lines
873 B
Markdown
# Wiring between ESP32 and Nano
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[← Back to the README](../README.md)
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The ESP32 talks to the Nano on **UART2** (`Serial2`, 115200 baud). The ESP32's own
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`Serial` (UART0, USB) is free for debug output.
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| ESP32 | Nano | Notes |
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|-------|------|-------|
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| GPIO 17 (TX2) | D0 (RX) | Display commands |
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| GPIO 16 (RX2) | D1 (TX) | `READY` and `ERR` replies, and bootloader answers when flashing over WiFi. Use a 5 V → 3.3 V voltage divider (e.g. 1 kΩ / 2 kΩ), because the ESP32 is not 5 V tolerant. Without it, the ESP waits a fixed 3 s after power-on, and `nano_ota` doesn't work. |
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| GPIO set in `NANO_RESET_PIN` | RESET (through an NPN transistor) | Optional, only needed to flash a Nano with Optiboot over WiFi. See [Bootloaders](nano-ota.md#bootloaders). |
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| GND | GND | Common ground |
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| GPIO 13 | Relay input | Relay powers the panels and the Nano (`LOW` = on) |
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