Firebeetle DFR0478 GPIO's going high during sleep
Brett.Johnson 2023-03-03 23:47:51 404 Views2 Replies I am trying to use a fire beetle ESP32 for a project that requires deep and light sleep. I need access to 7 digital output pins for my project. I am able to turn all digital pins high and low while the board is awake. However, when I enter either light or deep sleep D9,D8,D6,D5 all go to 2.5-3.3V during sleep even when the board is completely disconnected from my circuit. This is a problem because it is turning my circuity on in sleep mode. Does anyone have any thoughts?
Hello,
After browsing onthe web, I have found that ESP32 provides some APIs to hold the status of GPIO in sleep mode. For example, gpio_hold_en() can enable the GPIO pad hold function in both input and output modes, but it only supports output-capable GPIOs. In deep-sleep mode, the state of the digital GPIO cannot be held, and you need to call the gpio_deep_sleep_hold_en() function additionally. To disable the pad hold function, you can call the gpio_hold_dis() function.
hope it helps,
best regards
xingzhao.zhu You can disable the internal pull-up resistors on the affected GPIO pins before entering sleep mode. See if it helps.
bidrohini.bidrohini 
