iDryer RP2040: menu manual¶

global means one shared value for the whole device.
per controller means a separate value for each UNIT.
toggle items are shown as ON/OFF in UI.
Some uint8 values are rendered as text in UI:
LANGUAGE: 0=RU, 1=EN
PORT 1/2/3: EXT/SCR/SCL/LNK (see GLOBAL -> PORT CONFIG)

CONTROLLER
DRYING
STORAGE
PROFILE
PRESETS
SCALES
SETTINGS
GLOBAL

CONTROLLER (global)¶

Item	Type	Range	Default	Logic
`CONTROLLER`	value	`0..2`	`0`	Selects active UNIT. All `per controller` items are edited for this UNIT. On change, value is clamped to `units_count-1`.

DRYING (per controller)¶

Item	Type	Range	Default	Logic
`TEMPERATURE`	value	`30..110 °C`, step `1`	`60`	Target air temperature for drying.
`TIME`	value	`0..600 min`, step `1`	`240`	Drying duration.
`START`	action	-	-	Starts Drying mode for active UNIT. If `Temp` or `Time` is `0`, fallback values `60 °C` and `30 min` are used.

Drying timer logic:

Countdown does not start at START press.
Countdown starts when air temperature enters ±1 °C band around target.
When time expires:
if SETTINGS -> STORAGE -> AUTO STORAGE = ON, controller switches to Storage;
if OFF, controller stops (Idle).

STORAGE (per controller)¶

Item	Type	Range	Default	Logic
`TEMPERATURE`	value	`35..90 °C`, step `1`	`45`	Base storage temperature (when temperature-priority control is used).
`HUMIDITY`	value	`5..30 %RH`, step `1`	`12`	Target humidity for humidity-priority control.
`BY HUMIDITY`	toggle	`ON/OFF`	`ON`	`ON`: humidity priority. `OFF`: temperature priority.
`START`	action	-	-	Starts Storage mode with current active UNIT settings.

Storage logic:

If humidity priority is ON, heating is toggled by RH hysteresis and MIN HOLD (see SETTINGS -> STORAGE).
If humidity priority is OFF, storage temperature target is maintained.

PROFILE (per controller)¶

PROFILE START¶

Item	Type	Range	Default	Logic
`FIRST STAGE`	value	`1..10`, step `1`	`1`	First profile stage to start from.
`PROFILE START`	action	-	-	Starts 10-stage profile for active UNIT.

STAGES 01..10¶

Each stage has:

TEMPERATURE: 30..110 °C, step 1
RAMP: 0..1200 min, step 1
HOLD: 0..1200 min, step 1

Default values:

Stage	Temp, °C	Ramp, min	Hold, min
01	50	5	1
02	60	5	1
03	70	5	1
04	60	5	1
05	50	5	1
06	70	5	1
07	90	5	1
08	75	5	1
09	65	5	1
10	55	5	1

Profile execution logic:

Every stage has RAMP phase then HOLD phase.
In RAMP, target temperature changes smoothly over time from current to stage target.
Move to next stage only when both are true in HOLD:
hold duration elapsed;
temperature reached threshold (about target - 1 °C).
After final stage, profile ends and controller goes to Idle.

PRESETS (global)¶

Each preset includes:

TEMPERATURE
TIME
START (starts Drying on active UNIT with preset values)

Common time range for all presets: 0..600 min, step 5.

Preset	Temperature range, °C	Temperature default, °C	Time default, min
PLA	35..55	45	240
PLA-CF	35..55	45	240
PLA-GF	35..55	45	240
PETG	50..70	60	180
PETG-CF	55..75	65	180
PETG-GF	50..70	60	180
ABS	70..90	80	240
ABS-CF	80..100	90	240
ABS-GF	80..100	90	240
PA	80..100	90	240
PA-CF	90..110	100	240
PA-GF	90..110	100	240
PC	90..110	100	360
PC-CF	90..110	100	360
MY1	60..80	70	360
MY2	70..90	80	360
MY3	80..100	90	360

SCALES (global)¶

NUMBER OF MODULES¶

Item	Type	Range	Default	Logic
`NUMBER OF MODULES`	value	`0..4`	`0`	Number of active HX711 scale modules. On change, `setNumSensors()` is called.

TARE¶

Item	Type	Range	Default
`SPOOL 1`	value	`0..2000 g`, step `1`	`0`
`SPOOL 2`	value	`0..2000 g`, step `1`	`0`
`SPOOL 3`	value	`0..2000 g`, step `1`	`0`
`SPOOL 4`	value	`0..2000 g`, step `1`	`0`

CALIBRATION¶

For each spool (1..4):

SET ZERO — zero-point calibration
SET 1000 G — 1000 g calibration point

SETTINGS (per controller)¶

STORAGE¶

Main¶

Item	Type	Range	Default	Logic
`AUTO STORAGE`	toggle	ON/OFF	ON	After Drying completion, Storage starts automatically.
`AUTO DRY`	toggle	ON/OFF	ON	Under development.

BY HUMID¶

Item	Type	Range	Default	Logic
`HYSTERESIS %`	value	`1..10 %`, step `1`	`5`	For RH control: heating ON at `RH >= target + hyst`; heating OFF at `RH <= target`; switching is limited by `MIN HOLD`.

BY TEMP¶

Item	Type	Range	Default	Logic
`ABS/%DRY`	toggle	ON/OFF	OFF	`OFF` = absolute storage temperature (`STORAGE -> TEMPERATURE`), `ON` = percentage of last drying temperature (`lastDryTemp`).
`% OF DRY TEMP`	value	`50..100 %`, step `1`	`90`	Used in `%DRY` mode.

COMMON¶

Item	Type	Range	Default	Logic
`MIN HOLD`	value	`5..600 s`, step `5`	`30`	Minimum time between heating state switches in Storage-by-Humidity mode.

Important for Storage temperature target:

Storage target is clamped in code to 45..air_max_temp.
In %DRY mode, lastDryTemp is used (last Drying target).

PID HEATER¶

Item	Type	Range	Default
`Kp`	float	`0..1000`, step `0.1`	`9.810`
`Ki`	float	`0..1000`, step `0.01`	`0.084`
`Kd`	float	`0..1000`, step `0.1`	`87.825`
`GAIN`	float	`0.1..50`, step `0.01`	`9.810`
`Autopid`	action	-	-

PID CHAMBER¶

Item	Type	Range	Default
`Kp`	float	`0..1000`, step `0.1`	`5.873`
`Ki`	float	`0..1000`, step `0.01`	`0.18`
`Kd`	float	`0..1000`, step `0.1`	`50.402`
`GAIN`	float	`0.1..200`, step `0.01`	`5.873`
`Autopid`	action	-	-

PID logic:

Coefficients are applied immediately after changes.
GAIN is used inside controller as PID gain multiplier.
GAIN in PID HEATER is the global gain multiplier of the heater PID controller.

How it works:

it scales the whole control loop response;
when GAIN is increased, the heater reacts more aggressively and reaches the target faster;
when GAIN is decreased, the response is softer and more stable, but target reach takes longer.

In practice:

too low GAIN -> sluggish heating and long time to reach setpoint;
too high GAIN -> overshoot, oscillations, and possible instability.
Autopid runs tuning for active UNIT:
PID HEATER: target temperature is about 80% of heater MAX TEMP;
PID CHAMBER: target temperature is taken from current DRYING -> TEMPERATURE.

HEATING¶

Item	Type	Range	Default	Logic
`MAX TEMP`	value	`30..150 °C`, step `1`	`130`	Base heater limit.
`MAX AIR TEMP`	value	`30..120 °C`, step `1`	`90`	Base air limit.
`DELTA`	value	`0..45`, step `1`	`35`	Offset used by cascaded control for heater setpoint relative to air target.
`DELTA ABS/%`	toggle	ON/OFF	OFF	`OFF`=absolute DELTA, `ON`=percent of current air target.

DELTA is not an “air temperature increment,” but a heater temperature headroom relative to the target air temperature.

For example, DELTA = 35 means:

the controller can keep the heater target temperature about +35 °C above the current air target;
this is needed because air passing through the heater takes only part of the heat, while part of the energy is lost.

Why this happens:

right after the heater, airflow is hotter, but after just a few centimeters it starts mixing with colder air in the chamber;
due to that mixing, air temperature quickly becomes lower than the heater surface temperature;
therefore, to maintain the required air temperature, the heater operates with “headroom”.

Summary:

DELTA sets the energy headroom for cascaded PID;
too small DELTA can cause underheating and slow warm-up;
too large DELTA increases the risk of filament overheating.

CHECK (heater verification)¶

Item	Type	Range	Default
`ERROR LIMIT`	value	`0..500`, step `10`	`150`
`TEMP GAIN`	value	`0.1..10.0 °C`, step `0.1`	`1.0`
`CHECK WINDOW`	value	`5..120 s`, step `1`	`20`
`PWM START %`	value	`10..100 %`, step `5`	`30`

Actual CHECK behavior:

CHECK is part of the safety loop. Its purpose is to confirm that when power is applied to the heater, the system sees the expected temperature response.

This helps detect failures such as:

weak or non-working heater;
poor electrical contact;
invalid sensor (thermistor) behavior;
a state where power is applied but heating response is missing.

If heater response does not match expectations, firmware raises Heater not heating and aborts the current control cycle.

Parameters ERROR LIMIT, TEMP GAIN, CHECK WINDOW, and PWM START % should be tuned for the actual setup: chamber volume, enclosure heat losses, heater power, and airflow.

Examples:

Small chamber + powerful heater: reduce CHECK WINDOW and/or increase TEMP GAIN to catch anomalies faster.
Large chamber with high thermal inertia: increase CHECK WINDOW and ERROR LIMIT to reduce false triggers.
False triggers at startup: usually fixed by slightly increasing PWM START % and CHECK WINDOW.

Emergency stops by temperature:

Air: emergency at air_temp >= MAX AIR TEMP + 5 °C.
Heater: emergency at heater_temp >= MAX TEMP + 10 °C.

FAN¶

Item	Type	Range	Default	Logic
`ON THRESHOLD`	value	`40..70 °C`, step `0.5`	`55`	Fan turn-on threshold.
`HYSTERESIS`	value	`5..20 °C`, step `0.5`	`5`	Fan turns off when `temp < ON THRESHOLD - HYSTERESIS`.

HYSTERESIS is used to prevent rapid fan toggling near the threshold.

The logic is simple:

turn on: when temperature reaches ON THRESHOLD;
turn off: only after temperature drops below ON THRESHOLD - HYSTERESIS.

SERVO¶

Item	Type	Range	Default	Logic
`CLOSED ANGLE`	value	`0..180°`, step `1`	`20`	Closed flap angle. Triggers servo preview when changed.
`OPEN ANGLE`	value	`0..180°`, step `1`	`50`	Open flap angle. Triggers servo preview when changed.
`CLOSED TIME`	value	`0..3600 s`, step `1`	`600`	Time to keep flap closed.
`OPEN TIME`	value	`0..600 s`, step `1`	`30`	Time to keep flap open.
`SMART MODE`	toggle	ON/OFF	OFF	Smart flap control by humidity trend during active drying.

SERVO helps remove high-humidity air from the dryer. The optimal flap open/close frequency depends on real conditions: filament moisture, chamber volume, and ambient humidity. Default values are a practical baseline and were selected empirically.

Flap timer behavior:

If OPEN TIME = 0 and CLOSED TIME > 0, flap is kept closed.
If CLOSED TIME = 0 and OPEN TIME > 0, flap is kept open.

GLOBAL (global)¶

PORTAL¶

Item	Type	Logic
`CLAIM`	action	Starts UART Link claiming procedure and shows status.
`IGNOR EXT CMD`	toggle	“Telemetry without remote control” mode.

CLAIM:

intended to bind the device to the portal via UART Link;
currently, Link is usually configured through install.idryer.org in one flow: firmware flashing, Wi-Fi setup, and portal binding;
CLAIM flow will be expanded in future firmware versions.

IGNOR EXT CMD:

allows keeping full portal functionality (telemetry, statistics, filament tracking), while disabling execution of incoming external control commands;
if you prefer maximum local control, enable this mode;
important: in the current firmware, this flag is present in menu storage, but full command filtering by this flag is still being integrated.

SESSION COUNTER¶

Item	Type	Range	Default	Meaning
`DRYING`	value	`0..65535`	`0`	Drying session counter.
`STORAGE`	value	`0..65535`	`0`	Storage session counter.
`PROFILE`	value	`0..65535`	`0`	Profile session counter.

Counters are incremented when controller enters the corresponding mode. Counter purpose: track cycle counts (drying/storage/profile), analyze usage intensity, plan maintenance, and estimate operational load on infrastructure.

PORT CONFIG¶

Item	Type	Range	Default
`PORT 1`	value	`0..3`	`2` (`SCL`)
`PORT 2`	value	`0..3`	`3` (`LNK`)
`PORT 3`	value	`0..3`	`1` (`SCR`)

Value mapping:

0 = EXT (extra dryer module)
1 = SCR (screen)
2 = SCL (scales)
3 = LNK (UART link)

Validity constraints (UI blocks invalid combinations):

Port1: only EXT or SCL.
Port2: EXT, SCL, or LNK.
Port3: SCR or LNK.
SCR, SCL, LNK may exist only on one port each.
Port2=EXT is allowed only if Port1=EXT.

UNITS¶

Item	Type	Range	Default	Logic
`UNITS`	value	`1..3`	`1`	Clamped by hardware maximum (`calcMaxUnits()`), then active `CONTROLLER` is corrected if needed.

LANGUAGE¶

Item	Type	Range	Default
`LANGUAGE`	value	`0..1`	`1`

Values:

0 = RU
1 = EN

Quick scenarios¶

Manual drying: CONTROLLER -> DRYING -> TEMPERATURE/TIME -> START.
Preset drying: PRESETS -> material -> START.
Humidity-based storage: STORAGE -> BY HUMIDITY=ON -> START, then tune SETTINGS -> STORAGE -> HYSTERESIS % / MIN HOLD.
% of drying temp storage: SETTINGS -> STORAGE -> ABS/%DRY=ON, set % OF DRY TEMP, then STORAGE -> START.
Profile run: PROFILE -> PROFILE START -> FIRST STAGE -> PROFILE START.