Hi, I've got a simular error when the i2c sensor is disconnected. What kind of sensor are you using? Can you paste your exact error message? When it crashes, does it crash over-and-over? yes it's crashing over and over again I am using the tmp102 temperature sensor ESP_ERROR_CHECK failed: esp_err_t...

Hi,

I've got a simular error when the i2c sensor is disconnected.

This seems to do the trick.

These GPIO pins are not used in the schematic of the ESP32 Wrover.

Is the underlying cause the difference between hardware version REV0 en REV1 of the ESP32 chip?

Hi,

I measure when using the same code the esp-wroom-32 uses 7uA and the esp32 wrover uses 80uA. The underlying pcb is also the same.

I wonder what is extra needed for the esp32 wrover to get to the low current usage.

Thanks,

Hi,

Since I started with the latest idf V3.0.0rc1 I receive the warning:
WARNING: Toolchain version is not supported: 1.22.0-61-gab8375a
Expected to see version: 1.22.0-75-gbaf03c2

I wonder what is missing? The development is under windows Msys32

Thanks,

@WiFive, you're right. Programming the ulp processor is doable using the assembler macros.
I was able to do temperature logging of the cpu temperature in RTC memory.

@Espressif, a sample of I2C with the ulp processor would be appreciated.

Thanks,

Hi, The end product would be more complex. During guarding the temperature sensor is controlled by I2C and the temperature should be displayed on a lcd display with low energy. Here I was hoping that the deep sleep wake up stub would make it doable to do in C-code to: -measure temperature over I2C -...

Hi,

Your sample with deep sleep stub combined with timer would be usefull.

Thanks,

Ok,

Thanks for the reply.

I am looking for a solution to periodically log temperature and send result once a day.

How to control the deep sleep timer from deep sleep stub and move a function to ROM?

Thanks,

Hi, I also experience WDT reset when enabling a custom Deepsleep stub. Do I have the same bug here: static void RTC_IRAM_ATTR sensor_reading(void) { REG_WRITE(TIMG_WDTFEED_REG(0), 1); if (mcount > 1023){ //prevent array overflow mcount = 0; } if ((mcount * 300) < mnextlog){ //Check when next log rep...