ESP32 Remote Control

Remote reset & boot mode controller for ESP32 via USB-Serial DTR/RTS signals.

Features

• 🔄 Normal Boot — Run firmware after reset
• 📥 Download Mode — Enter flash write mode remotely
• 💤 Deep Sleep Wake — Wake from deep sleep with selectable boot mode
• 📦 Flash & Run — Flash firmware and auto-boot in one command
• 📡 Serial Monitor — Monitor serial output

Requirements

• Python 3.7+
• pyserial package

pip install pyserial

Usage

# Normal Boot (run firmware)
python esp32_remote_control.py COM3 normal

# Download Mode (flash write)
python esp32_remote_control.py COM3 download

# Reset only
python esp32_remote_control.py COM3 reset

# Wake from deep sleep → Normal Boot
python esp32_remote_control.py COM3 wake --mode normal

# Wake from deep sleep → Download Mode
python esp32_remote_control.py COM3 wake --mode download

# Flash firmware and auto-run
python esp32_remote_control.py COM3 flash firmware.bin

# Serial monitor (30 seconds)
python esp32_remote_control.py COM3 monitor --duration 30

How It Works

ESP32 boot mode is controlled by two pins:

GPIO0	EN	Boot Mode
HIGH	LOW → HIGH	Normal Boot (run firmware)
LOW	LOW → HIGH	Download Mode (flash write)

USB-Serial chips (CH340, CP2102, FT232) control these pins via DTR/RTS signals — no additional hardware required on most ESP32 dev boards.

Boot Mode Reference

GPIO0	GPIO2	EN	Mode
HIGH	-	HIGH→LOW→HIGH	Normal Boot
LOW	LOW	HIGH→LOW→HIGH	Download Mode
-	-	LOW (Deep Sleep)	Wake-up on EN pull-up

License

MIT