Chamber temperatureIdle
--°C
Setpoint -- °C / Humidity -- %RH
Heater demand0%
Fan demand0%
Cycle elapsed00:00:00
Ready for a new cycle
Embedded engineering / interactive showcase
Controlled heat.
Repeatable drying.
A configurable dryer platform with multistage programs, temperature and humidity control, and explicit safety states. Built for ESP32 CYD, with a hardware-independent C++ control core.
Try the real CYD touchscreen UI →
Active program
Hold time begins once the final stage setpoint is reached and the chamber is within 2 °C. Humidity stages also require a continuous humidity dwell. The maximum cycle runtime includes pauses and warm-up.
Simulator
Device access
Use only on a trusted local network. HTTP does not encrypt access keys. Never expose the controller to the Internet.
Live process trend
Temperature / setpoint / humidity● Temperature● Setpoint● Humidity
Program editor
Up to eight stages. Humidity 0 disables humidity completion. Fan values are PWM demand; relay fans run at full speed whenever demand is nonzero.
Programs and safety settings can only change when idle or complete. Saving never starts a cycle.
Control & safety limits
Use the device touchscreen for Wi-Fi, display, GPIOs, output polarity, PWM fan mode and interlock wiring. Saved Wi-Fi and wiring changes require restart. Board family and heating commissioning remain build-time service settings; heating is disabled in the default firmware. The simulator has virtual outputs only.
Firmware update
Only while idle or complete. Upload the OTA app image, not a merged USB image. Never update while heating or cooling.
Session history
Last 720 samples in RAM (one per 30 controller seconds). Device restart clears trend samples; the last cycle result is retained in flash. Browser simulation settings are saved locally, but running cycles never resume on reload.
| Controller seconds | State | Temperature °C | Humidity % | Setpoint °C | Heater % | Fan % |
|---|
A platform, not a fixed recipe.
Hardware adapters isolate the control core from ESP-IDF. A headless build supports other ESP targets; the supplied display adapter targets the two-USB ST7789 CYD.
- Eight-stage programs with ramp limits
- Six selectable I²C sensor families
- Latched alarms and explicit cooldown
- Local web controls and CSV history
- Flash-backed settings and OTA rollback
- Shared-core browser & native simulators
Project downloads
Source, firmware and build instructions for the engineering prototype. Default firmware has heating disabled. Confirm your exact board and external protection before commissioning.