Uno R4 Wifi WDG游戏atchdog Timer_欧博ABG官网-欧博官方网址-会员登入

I used this article to create a timer that runs once a second:
https://www.pschatzmann.ch/home/2023/07/01/under-the-hood-arduino-uno-r4-timers/

This timer even runs when Arduino is busy doing cloud stuff. So inside this timer I kick the watchdog to keep it alive.
Inside my main loop I set a counter to millis() so I can check inside the timer how long it's been since the main loop ran.

#include "FspTimer.h" #include "WDT.h" FspTimer background_timer; unsigned long TimeoutCounter = 0; void setup() { if (WDT.begin(5000)) { WDT.refresh(); } else { Serial.println("Error initializing watchdog"); } beginTimer(1); } void loop() { TimeoutCounter = millis(); // Kick the timeout counter to avoid reset. } void timer_callback(timer_callback_args_t __attribute((unused)) *p_args) { WDT.refresh(); if (millis() > (TimeoutCounter + (1000 * 60 * 5))) NVIC_SystemReset(); // More than 5 minutes unresponsive } bool beginTimer(float rate) { uint8_t timer_type = GPT_TIMER; int8_t tindex = FspTimer::get_available_timer(timer_type); if (tindex < 0) { tindex = FspTimer::get_available_timer(timer_type, true); } if (tindex < 0) { return false; } FspTimer::force_use_of_pwm_reserved_timer(); if (!background_timer.begin(TIMER_MODE_PERIODIC, timer_type, tindex, rate, 0.0f, timer_callback)) { return false; } if (!background_timer.setup_overflow_irq()) { return false; } if (!background_timer.open()) { return false; } if (!background_timer.start()) { return false; } return true; }

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Uno R4 Wifi WDG游戏atchdog Timer