I'm doing IoT project, my device will sleep to save power. As i understand, if i use deep sleep mode, then every wake up, the code will run setup(); in light sleep, the core isnt sleep, so it only run loop(). i know how to use wakeup source to wakeup like timer, or external wakeup. all i want is if ...

i'm currently measure battery and send it to master using nrf24l01 module. but the first time after reset the battery measure always incorrect value. it's the same if wake up from deep sleep. i dont know how to fix. anyone help me? void setup() { esp_adc_cal_value_t val_type = esp_adc_cal_characteri...

my circuit to measure battery right now is esp32, nrf24l01, and 18650. i powered up esp32 with 18650 3.6v norminal/4.2 max battery. run a voltage divider 100k, 27k then it's 0.893v a measure point. at 3.6v measure point like ~0.72. i use internal 1.1v adc but why i only receive ~3v at monitor adc1_c...

i want to measure battery 3.0 min/3.6 norminal/ 4.2 max. my battery is 3.6 now. follow the doc the internal adc have 0db-->1.1 max sclae, 11db for 3.9 max sclae. 1st) i power up board by usb, gpio6 wiring to +battery, ground to ground, no divider set 11db for 3.9 max scale like the code. i hope i ca...

I use a 27 kOhm + 100 kOhm voltage divider to bring the 4.2 V maximum of a single cell LiPo battery down to 3.3 V, which is the reference voltage (AFAIK) of the ESP32 board I am using. I have the voltage divider connected to pin 34, and I read the pin as follows: float VBAT = (127.0f/100.0f) * 3.30...

could i have that library for esp32 wroom doit dev kit