It's because you're in the PHX namespace there. Try "::Preferences preferences;"

ESHF-105-01-L-D-SM looked good on Mouser for 5x2, no 3x2 variety in that series though.

I gave up and ended up buying both from here ("Position 6" and "Position 10"): https://www.aliexpress.com/item/33020323141.html
Delivery took ~3 weeks.

Also from that link:

The ADC1 module must be enabled by calling adc1_config_width() before calling hall_sensor_read(). ADC1 should be configured for 12 bit readings, as the hall sensor readings are low values and do not cover the full range of the ADC.

With standard gettimeofday implementation: #include <sys/time.h> RTC_DATA_ATTR timeval sleepTime; void setup() { if(esp_sleep_get_wakeup_cause() == ESP_SLEEP_WAKEUP_TIMER) { timeval timeNow, timeDiff; gettimeofday(&timeNow, NULL); timersub(&timeNow,&sleepTime,&timeDiff); printf("Now: %"PRIu64"ms, Du...

I don't see where wake_up_pin() is called. Check you copied your full sketch here.

Add a couple printouts for wakeup_reason and GPIO_reason, then post the full output here.

You're passing around uninitialised pointers.

Flash and RAM are different things. You might tinker with your partition layout if you're hitting flash limits; you might check free heap to debug RAM issues. Make sure you're clear what your problem is. Looks like it uses a WROVER so select the generic one for that- something like "ESP32-WROVER" pr...

Do you mean that it's trying to upload to "http://x.x.x.x/serverIndex/update" (rather than "http://x.x.x.x/update")? You'll have to figure out how to stop it going to the relative uri instead. Try removing the trailing / from your url (ie. go to "http://x.x.x.x/serverIndex" rather than "http://x.x.x...

How about

content_length = -1 But the content length is not -1, its 40 They're different things. esp_http_client_get_content_length is the value parsed from the Content-Length header. If the server doesn't provide this, as is the case with your link, it will return -1. You should revisit the example because ...