ESP32-C3 Smoke Sensor v1.0.0

ESP32-C3 Smoke Sensor Firmware v1.0.0

Features

• MQ2 smoke/gas sensor support on GPIO4 (analog) and GPIO3 (digital)
• 0.8V smoke detection threshold with template binary sensor
• WiFi connectivity to AhoyIOT network (DHCP)
• Home Assistant API integration
• OTA updates enabled
• Web server for diagnostics
• 60-second sensor warmup on boot

Wiring

• MQ2 A0 → GPIO4 (analog)
• MQ2 D0 → GPIO3 (digital)
• MQ2 VCC → 5V
• MQ2 GND → GND

Files

• esp32c3-smoke-sensor.factory.bin (1.1M) - Full factory image with bootloader
• esp32c3-smoke-sensor.bin (989K) - OTA update image

Flashing

USB (initial flash):

esphome run esp32-c3-supermini-smoke-fan.yaml --device /dev/ttyUSB0

OTA (updates):

esphome run esp32-c3-supermini-smoke-fan.yaml --device <IP_ADDRESS>

Or use esptool:

esptool.py --port /dev/ttyUSB0 write_flash 0x0 esp32c3-smoke-sensor.factory.bin