Added SwitchBox5

SwitchBox/SwitchBox5/New

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+New Board

SwitchBox/SwitchBox5/README.md

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+# Cab Switchbox 5
+
+ESP32-based 16-input network switchbox for the AgOpenGPS Rate Controller.
+
+## Repository contents
+
+- `firmware/ESP32_Cab_Switchbox/` — Arduino firmware source.
+- `release/` — precompiled ESP32 firmware files.
+- `docs/` — user manual, printable HTML, screenshots, and manual generator.
+- `hardware/SwitchBox5_Terminals_PCB_01/` — Rev 01 PCB production files.
+
+## Hardware target
+
+- ESP32 board: ESP32 DevKit / DOIT ESP32 DEVKIT V1
+- Arduino FQBN: `esp32:esp32:esp32doit-devkit-v1`
+- PCB: `SwitchBox5-Terminals-PCB-01`
+- Recommended enclosure: Hammond `E1555K2GY`, NEMA 4X
+- Board supply: 12-24 VDC
+- Onboard buzzer: 12 V only; use a 12 V supply if buzzer operation is required
+
+## Build
+
+Install Arduino CLI and the Espressif ESP32 Arduino core, then run from the
+repository root:
+
+```powershell
+arduino-cli compile `
+  --fqbn esp32:esp32:esp32doit-devkit-v1 `
+  --output-dir build `
+  firmware/ESP32_Cab_Switchbox
+```
+
+## Flashing
+
+The easiest full-device image is:
+
+```text
+release/ESP32_Cab_Switchbox.ino.merged.bin
+```
+
+Flash the merged image at address `0x0` with an ESP32 flashing tool.
+
+Arduino CLI can also compile and upload the source directly:
+
+```powershell
+arduino-cli upload `
+  -p COMx `
+  --fqbn esp32:esp32:esp32doit-devkit-v1 `
+  firmware/ESP32_Cab_Switchbox
+```
+
+Replace `COMx` with the switchbox serial port.
+
+## Documentation
+
+See `docs/CAB_SWITCHBOX_MANUAL.pdf` for setup, terminal assignments, network
+configuration, wiring, buzzer behavior, and troubleshooting.
+
+## Current build
+
+Compiled June 19, 2026:
+
+- Program storage: 1,045,571 bytes (79%)
+- Dynamic memory: 50,504 bytes (15%)
+

SwitchBox/SwitchBox5/RELEASE_NOTES.md

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+# Release Notes
+
+## Cab Switchbox 5 — June 19, 2026
+
+- Supports 16 configurable 12-24 VDC switch inputs.
+- Ethernet and WiFi communication with the Rate Controller.
+- Web-based setup, status, and troubleshooting pages.
+- Board-mounted 12 V alarm buzzer with Off, Reduced, and Full settings.
+- Rate Controller alarm packet support.
+- Rev 01 terminal PCB documentation and production files.
+- Updated manual for the Hammond E1555K2GY NEMA 4X enclosure.
+
+### Important power note
+
+The PCB inputs and electronics support 12-24 VDC. The installed buzzer is a
+12 V component connected to input power, so buzzer operation requires a 12 V
+board supply.
+