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RAK3401: powerOff() override + AIN1 SENSE LOW wake from SYSTEMOFF 🤖🤖 #2642

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RAK3401: powerOff() override + AIN1 SENSE LOW wake from SYSTEMOFF 🤖🤖 #2642

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14 changes: 14 additions & 0 deletions variants/rak3401/RAK3401Board.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,20 @@ void RAK3401Board::initiateShutdown(uint8_t reason) {
configureVoltageWake(power_config.lpcomp_ain_channel, power_config.lpcomp_refsel);
}

#ifdef PIN_USER_BTN_ANA
// Configure AIN1 button as GPIO SENSE wake source (active LOW).
// Wait for button release first — SENSE is level-triggered, so if the user is
// still holding the button when we arm SENSE, the chip wakes immediately.
while (digitalRead(PIN_USER_BTN_ANA) == LOW) delay(10);
delay(50); // debounce

uint32_t pin = (uint32_t)PIN_USER_BTN_ANA;
NRF_GPIO->PIN_CNF[pin] = (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos)
| (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
| (GPIO_PIN_CNF_PULL_Pullup << GPIO_PIN_CNF_PULL_Pos)
| (GPIO_PIN_CNF_SENSE_Low << GPIO_PIN_CNF_SENSE_Pos);
#endif

enterSystemOff(reason);
}
#endif
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4 changes: 4 additions & 0 deletions variants/rak3401/RAK3401Board.h
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Expand Up @@ -20,6 +20,10 @@ class RAK3401Board : public NRF52BoardDCDC {
RAK3401Board() : NRF52Board("RAK3401_OTA") {}
void begin();

#ifdef NRF52_POWER_MANAGEMENT
void powerOff() override { initiateShutdown(SHUTDOWN_REASON_USER); }
#endif

#define BATTERY_SAMPLES 8

uint16_t getBattMilliVolts() override {
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