bkw777 · March 3, 2026 16:26 · bkw777 · Mar 2, 2026
diff --git a/BYA_BYxxxx_hot_plate.txt b/BYA_BYxxxx_hot_plate.txt

 Directions for BYA hot plate
 BY1010 BY1515 BY2020 BY2030 BY3030 BY4030

 https://www.amazon.com/dp/B0932X6JB8
 https://www.amazon.com/dp/B0CN19C4DC
 https://www.amazon.com/dp/B0CC62TP4L
 https://www.aliexpress.us/item/3256805843992076.html
 https://www.aliexpress.us/item/3256805212626461.html
 https://www.aliexpress.us/item/3256804646990894.html

 No manual available initially, this was all deduction & experiment.
 Over time people have found a few more bits of info.
 Still incomplete.

 Display:

 Flashing numbers are the set target temperature.
 Steady numbers are the current actual temperature.

 Bottom-right corner dot is the heater on/off indicator.

 Power on
 displays 1 sec: “InP”
 displays 1 sec: “C K”
 displays: “###.”
 last decimal pulsing irregular with heater
 This is normal heating mode.

 Set target temperature:
 press: SET
 disp: ### blinking current setting
 press: UP/DN
 range: 000-400
 press: ENT

 Unknown Function:
 press: UP + DN
 disp: "odE"
 press: SET
 press: UP/DN
 disp: 000-999 (000)
 press: ENT
 exits mode but doesn’t seem to store the setting

 Auto PID Tune:
 hold 3 sec: UP
 Hundreds/first decimal point flashes regular on/off  (not irregular with heater).
 Wait until hundreds place decimal stops blinking, a few minutes.
 Unit resumes normal heating mode.
 P,I,d params are set to new values.

 Parameters Menu:
 hold 3 sec: SET
 enters menu
 exits menu without saving if no press within 3 sec or power off.
 hold 3 sec: SET to save & exit

 for each parameter,
 displays parameter name, ex: “ Ar”
 press ENT
 displays current value, ex: “028”
 press UP or DN to adjust value
 press SET
 displays next parameter name
 "next" loops back to the top of the menu (RL1) until exiting with long-press SET

 "RL1"  (looks like "AL1")
 -199-999 (30)

 "oFC" 
 000-200 (000)

 "AT " - Auto PID Tune
 000-001 (000)
 000 = normal operation
 001 = immediately starts Auto PID Tune the same as the long-press-UP hot-key

 "  P" - PID control: Proportional
 000-999 (028)
 000 = Disable PID and control by Hysteresis instead

 Next 2 menu items change depending on if P is set to 000 or not.

 Temperature Control by PID
 IF "P" > 000 (
    "  I" - PID control: Integral
    000-999 (049)

    "  d" - PID control: Derivative
    000-999 (012)
 )

 Temperature Control by Hysteresis
 IF "P" = 000 (
    " oH" - Hysteresis control: ???
    000-200 (002)

    "HoF" - Hysteresis control: ???
    000-200 (000)
 )

 " Rz"  (looks like " Ar")
 001-100 (028)

 "  T"
 001-100 (002)

 " SC" - Temperature Correction ( aka calibration or offset )
 -199-200 (018)

 "LCK" - lock settings
 000-001 (000)
 000 = allow all parameters to be changed
 001 = allow only temperature to be changed

 ---------------------------------------------

 Ambiguous characters due to 7-segment display.

 Several of these displays are deduced by various means and from consulting https://en.wikipedia.org/wiki/Seven-segment_display_character_representations#Alphabet

 By itself, K looks more like Y than anything else.
 It doesn't exactly match that wikipedia example, but there is no real standard, and it does match the wikipedia uppercase K except upside down, which works exactly the same, and does not match anything else any better. Of the two occurances of the same glyph, "C K" could be "C Y" since that display has no obvious meaning, but the "LCK" menu item definitely does mean "lock", and so it's definitely "LCK", and so the power-on display is "C K".

 T looks like "r" but bigger, but it's T not R

 1 is the right two verticals
 The 1's in all the numbers are definitely numbers, and conform to the right-edge rule,
 and so the first menu item is "RL1".

 I is the left two verticals
 The "I" parameter is definitely the "I" in PID control, and conforms to the left-edge rule,
 and so the power-on display is "InP".

 "R" looks like "A"
 Some documents say the auto pid tune menu item is actually "RT",
 but others do say "AT".

 "z" looks like "r" but some pdf manuals say it's meant to be "z"

	Directions for BYA hot plate
	BY1010 BY1515 BY2020 BY2030 BY3030 BY4030

	https://www.amazon.com/dp/B0932X6JB8
	https://www.amazon.com/dp/B0CN19C4DC
	https://www.amazon.com/dp/B0CC62TP4L
	https://www.aliexpress.us/item/3256805843992076.html
	https://www.aliexpress.us/item/3256805212626461.html
	https://www.aliexpress.us/item/3256804646990894.html

	No manual available initially, this was all deduction & experiment.
	Over time people have found a few more bits of info.
	Still incomplete.

	Display:

	Flashing numbers are the set target temperature.
	Steady numbers are the current actual temperature.

	Bottom-right corner dot is the heater on/off indicator.

	Power on
	displays 1 sec: “InP”
	displays 1 sec: “C K”
	displays: “###.”
	last decimal pulsing irregular with heater
	This is normal heating mode.

	Set target temperature:
	press: SET
	disp: ### blinking current setting
	press: UP/DN
	range: 000-400
	press: ENT

	Unknown Function:
	press: UP + DN
	disp: "odE"
	press: SET
	press: UP/DN
	disp: 000-999 (000)
	press: ENT
	exits mode but doesn’t seem to store the setting

	Auto PID Tune:
	hold 3 sec: UP
	Hundreds/first decimal point flashes regular on/off (not irregular with heater).
	Wait until hundreds place decimal stops blinking, a few minutes.
	Unit resumes normal heating mode.
	P,I,d params are set to new values.

	Parameters Menu:
	hold 3 sec: SET
	enters menu
	exits menu without saving if no press within 3 sec or power off.
	hold 3 sec: SET to save & exit

	for each parameter,
	displays parameter name, ex: “ Ar”
	press ENT
	displays current value, ex: “028”
	press UP or DN to adjust value
	press SET
	displays next parameter name
	"next" loops back to the top of the menu (RL1) until exiting with long-press SET

	"RL1" (looks like "AL1")
	-199-999 (30)

	"oFC"
	000-200 (000)

	"AT " - Auto PID Tune
	000-001 (000)
	000 = normal operation
	001 = immediately starts Auto PID Tune the same as the long-press-UP hot-key

	" P" - PID control: Proportional
	000-999 (028)
	000 = Disable PID and control by Hysteresis instead

	Next 2 menu items change depending on if P is set to 000 or not.

	Temperature Control by PID
	IF "P" > 000 (
	" I" - PID control: Integral
	000-999 (049)

	" d" - PID control: Derivative
	000-999 (012)
	)

	Temperature Control by Hysteresis
	IF "P" = 000 (
	" oH" - Hysteresis control: ???
	000-200 (002)

	"HoF" - Hysteresis control: ???
	000-200 (000)
	)

	" Rz" (looks like " Ar")
	001-100 (028)

	" T"
	001-100 (002)

	" SC" - Temperature Correction ( aka calibration or offset )
	-199-200 (018)

	"LCK" - lock settings
	000-001 (000)
	000 = allow all parameters to be changed
	001 = allow only temperature to be changed

	---------------------------------------------

	Ambiguous characters due to 7-segment display.

	Several of these displays are deduced by various means and from consulting https://en.wikipedia.org/wiki/Seven-segment_display_character_representations#Alphabet

	By itself, K looks more like Y than anything else.
	It doesn't exactly match that wikipedia example, but there is no real standard, and it does match the wikipedia uppercase K except upside down, which works exactly the same, and does not match anything else any better. Of the two occurances of the same glyph, "C K" could be "C Y" since that display has no obvious meaning, but the "LCK" menu item definitely does mean "lock", and so it's definitely "LCK", and so the power-on display is "C K".

	T looks like "r" but bigger, but it's T not R

	1 is the right two verticals
	The 1's in all the numbers are definitely numbers, and conform to the right-edge rule,
	and so the first menu item is "RL1".

	I is the left two verticals
	The "I" parameter is definitely the "I" in PID control, and conforms to the left-edge rule,
	and so the power-on display is "InP".

	"R" looks like "A"
	Some documents say the auto pid tune menu item is actually "RT",
	but others do say "AT".

	"z" looks like "r" but some pdf manuals say it's meant to be "z"
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