Guangyingmao：创建页面，内容为“'''Photonicat 2''' has a single two-colour indicator LED (red + green). Yellow/orange is produced by lighting both colours together; there is no blue. The indicator follows a MacBook-style scheme: * '''Colour tells you the charge state''' — 🟠 yellow = charging, 🟢 green = charged. * '''Motion tells you the machine state''' — breathing = system running, steady = system off. Applies to firmware '''RA2E1260726001''' and later. Earlier firmware did not d…”

2026-09-03T02:56:59Z

创建页面，内容为“'''Photonicat 2''' has a single two-colour indicator LED (red + green). Yellow/orange is produced by lighting both colours together; there is no blue. The indicator follows a MacBook-style scheme: * '''Colour tells you the charge state''' — 🟠 yellow = charging, 🟢 green = charged. * '''Motion tells you the machine state''' — breathing = system running, steady = system off. Applies to firmware '''RA2E1260726001''' and later. Earlier firmware did not d…”

新页面

'''Photonicat 2''' has a single two-colour indicator LED (red + green). Yellow/orange is produced by lighting both colours together; there is no blue.

The indicator follows a MacBook-style scheme:
* '''Colour tells you the charge state''' — 🟠 yellow = charging, 🟢 green = charged.
* '''Motion tells you the machine state''' — breathing = system running, steady = system off.

Applies to firmware '''RA2E1260726001''' and later. Earlier firmware did not distinguish system on/off while charging or charged.

Since '''RA2E1260731011''' the charging orange is warmer (R60 %/G24 % instead of R55 %/G35 %), the breath fades only to a dim-orange floor (≈1/12 of peak) before the valley off — on earlier firmware the dim ends of each breath cycle could look pure red — and the valley off hold is 0.5 s instead of 0.24 s (cycle ≈6.1 s).

Since '''RA2E1260802000''': trying to power on with a flat or too-low pack flashes red '''three times''' immediately (earlier firmware showed nothing, so a flat device looked bricked), and a short press while off with a low pack shows the same three flashes. Continuous red flashing is only used while the system is running. The power-button long press is now 1.5 s.

Fixed in '''RA2E1260805000''': on RA2E1260802000–RA2E1260802001 a short press while the device was off in standby could flash red three times '''even with a full battery''' — the voltage sensor briefly reads 0 mV while waking from standby and this was miscounted as low battery. Red now requires a genuine low-voltage reading.

Since '''RA2E1260808001''': with the system off and the battery below the minimum boot voltage (6600 mV), '''any''' press of the power button answers with the three red flashes right away — about 0.1 s into the press, before the system power rail is touched — and the device then drops back into deep sleep to preserve the last battery reserve for the built-in clock. On RA2E1260802000–RA2E1260808000 the refused-boot flashes only appeared after holding the full 1.5 s long press and releasing; a shorter press showed nothing until release. Also fixed in this version: if the continuous low-battery warning was flashing when the system shut down (including the automatic 6300 mV shutdown), earlier firmware never cancelled it — the red kept flashing indefinitely after the system was off and prevented the controller from sleeping, draining the remaining battery. It now stops at shutdown.

中文版见 [[Photonicat 2 LED 指示灯]]. For buzzer tones see [[Photonicat 2 Sound Guide]].

==Quick reference==

The animations below are illustrative; their timing matches the firmware (≈6.1 s breathing cycle, 2 s heartbeat).

{| class="wikitable"
! Animation !! Indicator !! Meaning
|-
| [[File:Pcat2-led-orange-breathing-v3.gif|52px|link=]] || 🟠 Yellow, breathing || Charging, system running
|-
| [[File:Pcat2-led-orange-solid-v3.gif|52px|link=]] || 🟠 Yellow, steady || Charging, system off
|-
| [[File:Pcat2-led-green-breathing-v3.gif|52px|link=]] || 🟢 Green, breathing || Fully charged (or at charge limit), system running
|-
| [[File:Pcat2-led-green-solid-v2.gif|52px|link=]] || 🟢 Green, steady || Fully charged (or at charge limit), system off
|-
| [[File:Pcat2-led-green-heartbeat-v2.gif|52px|link=]] || 🟢 Green, heartbeat pulse || Running on battery, charge level normal
|-
| [[File:Pcat2-led-red-lowbatt-v2.gif|52px|link=]] || 🔴 Red, flashing || Low battery (below 6500 mV — see [[#Low battery red light|Low battery red light]])
|-
| [[File:Pcat2-led-off-v2.gif|52px|link=]] || ⚫ Off || Idle on battery, system off
|}

==Full state table==

Battery thresholds are firmware defaults and can be overridden by the host. Values are for the 2S pack: full 8280 mV, low warning 6500 mV, minimum boot 6600 mV, hard shutdown 6300 mV.

{| class="wikitable"
! Power level !! Charger !! Animation !! Colour !! Pattern !! Timing
|-
| Charging, any level || Connected || [[File:Pcat2-led-orange-breathing-v3.gif|44px|link=]] || 🟠 Yellow || Breathing (system on) || 2.8 s up / 2.8 s down / 0.5 s off, ≈6.1 s cycle; fades to a dim-orange floor (≈peak/12), never pure red
|-
| Charging, any level || Connected || [[File:Pcat2-led-orange-solid-v3.gif|44px|link=]] || 🟠 Yellow || Steady (system off) || Constant
|-
| Full, or at charge limit || Connected || [[File:Pcat2-led-green-breathing-v3.gif|44px|link=]] || 🟢 Green || Breathing (system on) || Same ≈6.1 s cycle, after 10 s delay
|-
| Full, or at charge limit || Connected || [[File:Pcat2-led-green-solid-v2.gif|44px|link=]] || 🟢 Green || Steady (system off) || Constant, after 10 s delay
|-
| Below 6600 mV, DC ≥ 8 V, no charge current || Connected || [[File:Pcat2-led-orange-solid-v3.gif|44px|link=]] || 🟠 Yellow || Steady || Constant
|-
| Above 6500 mV, system on || None || [[File:Pcat2-led-green-heartbeat-v2.gif|44px|link=]] || 🟢 Green || Heartbeat pulse || 2 s period
|-
| Above 6500 mV, system starting || None || [[File:Pcat2-led-green-solid-v2.gif|44px|link=]] || 🟢 Green || Steady || Constant
|-
| Above 6600 mV, system off || None || [[File:Pcat2-led-green-solid-v2.gif|44px|link=]] || 🟢 Green || Steady || Constant
|-
| Below 6500 mV, system on || None || [[File:Pcat2-led-red-lowbatt-v2.gif|44px|link=]] || 🔴 Red || Continuous flashing || 1 s on / 1 s off, begins after 60 s, until the voltage recovers
|-
| Below 6500 mV (valid reading), short press, system off || None || [[File:Pcat2-led-red-lowbatt-v2.gif|44px|link=]] || 🔴 Red || Flicker || 1 s on / 1 s off, '''3 flashes''', first flash immediate (0.5 s debounce)
|-
| Below 6600 mV, any power-button press, system off || None || [[File:Pcat2-led-red-lowbatt-v2.gif|44px|link=]] || 🔴 Red || Flicker || '''3 flashes''', first flash ≈0.1 s into the press (since '''RA2E1260808001'''; earlier firmware flashed only after releasing a full 1.5 s long press). The system power rail is never touched; the device returns to deep sleep afterwards
|-
| Charger removed, system off || None || [[File:Pcat2-led-off-v2.gif|44px|link=]] || colspan="2" | ⚫ Off
|}

==Service and transitional states==

These override the states above.

{| class="wikitable"
! State !! Animation !! Colour !! Pattern !! Timing
|-
| Shutting down || [[File:Pcat2-led-green-blink-shutdown-v2.gif|44px|link=]] || 🟢 Green || Blink || ≈0.5 s on / 1.5 s off
|-
| Firmware download mode || [[File:Pcat2-led-orange-blink-fast-v3.gif|44px|link=]] || 🟠 Yellow || Fast blink || ≈0.5 s period
|-
| Reset / factory restore mode || [[File:Pcat2-led-orange-blink-slow-v3.gif|44px|link=]] || 🟠 Yellow || Slow blink || ≈1 s period
|}

==Low battery red light==

When the battery runs low the indicator turns 🔴 '''flashing red'''. This is the only situation in which red is used.

{| class="wikitable"
! Item !! Detail
|-
| Trigger || Battery below '''6500 mV''' (2S pack, about 3.25 V per cell) with '''no charger connected'''
|-
| Rhythm || 1 second on / 1 second off
|-
| Repeats || '''System running:''' flashes continuously until the voltage recovers or a charger is connected. '''System off''' (any power-button press): exactly '''3 flashes''', then the device goes back to deep sleep
|-
| While running || Starts only after the voltage has stayed below the threshold for '''60 seconds'''
|-
| Any press while off || With the battery below the boot threshold, any press of the power button flashes red three times, starting about 0.1 s into the press (since '''RA2E1260808001'''); the device then returns to deep sleep. A 0 mV sensor warm-up reading right after standby wake does not count — the firmware takes a fresh voltage sample before deciding (since '''RA2E1260805000''')
|-
| Effect on green || The green heartbeat stops while red is active; the two never show together
|}

'''⚠️ Important'''

* While the system is running, the red warning '''keeps flashing until the voltage recovers or a charger is connected'''; it does not stop on its own. (Firmware before RA2E1260726003 flashed only 3 times and then went quiet.) While the system is off, short press and refused power-up flash exactly 3 times so the MCU can return to standby.
* The red threshold (6500 mV) is only '''200 mV above the hard shutdown point (6300 mV)'''. That is a very steep part of the 2S li-ion discharge curve, so connect a charger promptly once you see red.
* The trigger is '''voltage, not a percentage'''. Under heavy load the voltage sags and the warning can appear while a useful charge remains; when the load drops the voltage recovers and the warning stops.

==Charge limit==

If a charge limit is configured (for example 80 %), the charger is switched off once the pack reaches it. Charge current drops to zero, so the device treats this as fully charged and shows 🟢 '''green'''. The pack then powers the load and slowly discharges until it falls below the resume threshold, at which point charging restarts and the indicator returns to 🟠 yellow. Each transition is delayed by about 10 seconds.

==Notes==

* Green breathing peaks at 25 % duty while steady green is 50 %, so breathing green looks dimmer than steady green. Orange breathing peaks at the same R60 %/G24 % mix as steady orange.
* 🔴 Red is only ever used for low battery. While the system is running it keeps flashing until the voltage recovers or a charger is connected; while off it flashes exactly three times.
* The indicator can be disabled through the host protocol, in which case all green/yellow states stay off. The 🔴 low-battery red warning is exempt since '''RA2E1260808001''': it is a system-level alert and flashes even with the indicator disabled, so a flat pack refusing to boot never looks dead. (Before that version, disabling the indicator silenced red too.)
* For how the charge level behind these indications is computed, see [[Photonicat 2 SOC Calculation]].

[[Category:Photonicat 2]]

Photonicat 2 LED Indicator - 版本历史