Ember

Ember is an ESP32-based RPM and speedometer converter with Wi-Fi configuration and firmware updates. It samples the two analog input paths and measures the fundamental frequency of their conditioned pulse signals, providing a small foundation for converting those measurements into vehicle-specific outputs.

Current scope

This repository is intentionally a minimal product template. The firmware contains only:

• continuous ADC sampling for the RPM and speed signal paths;
• interrupt-driven frequency measurement for conditioned RPM and speed pulses;
• a compact status protocol;
• a Wi-Fi web interface with live input readings;
• over-the-air (OTA) firmware installation.

The dashboard/display, MFA, vehicle telemetry, lighting, buzzer, BLE, sleep, and legacy microcontroller implementations from the upstream project have been removed.

Repository layout

ESP32/Ember/
├── components/nvs_wifi_connect/  Wi-Fi provisioning component
├── main/                         Ember application sources and web UI
├── partitions.csv                OTA-capable partition table
└── sdkconfig.defaults            ESP32 project defaults

See ESP32/Ember/README.md for wiring, setup, building, flashing, web API, and OTA instructions.

Requirements

• Espressif ESP-IDF 5.2 or newer
• A classic ESP32 target (not ESP32-S3)
• gzip, used by the build to package the embedded web page

Quick start

cd ESP32/Ember
idf.py set-target esp32
idf.py build
idf.py -p /dev/ttyUSB0 flash monitor

On first boot, connect to the Ember_AP access point and configure Wi-Fi. Change the default provisioning password before deploying a device.

License

Ember is distributed under the MIT License. See LICENSE.txt.