I can't answer all your question since I'm still learning. But I can answer the last one: there isn't any heap on the LP cpu, so the memory usage can't change for the whole duration of the program. You could, theoretically access any byte on the available 16kB address space, but the way the toolchai...

Sorry, I missed your answer. You're right, the &dataBuffer[i * 3] should read &dataBuffer[index * 3] . index will never be 2, so it's safe. In fact I've made many progress on diagnosing the issue, see here . In short, the I2C HW crashes when queueing more than 2 transactions. Either we need to stop ...

In fact, esp_config.h includes mbedtls_config.h that doesn't exist either, so it doesn't solve the issue.

Hi, I'm trying to create a single object that's storing the transactions to happen on I2C bus by queueing all the operations and expecting the CPU to run them all correctly. Typically, I'm doing this (pseudo code): #define FilterError(x) ((x) == ESP_OK) uint8 buffer[I2C_LINK_RECOMMENDED_SIZE(4)]; //...

It's likely too late, but you have 3 options, depending on what are your latency expectations: If more than 10µs is acceptable and you still want to use a FreeRTOS task, use xTaskNotifyFromISR() in place of a queue, it's much faster. BTW, don't call portYieldFromISR unconditionally. You need to use ...

Currently, the default HTTP client in the component library is a monster. Instantiating it adds ~160kB of binary size when compiled with -Os (and this is likely multiplied 3x if using factory + 2 OTA partitions). Looking at the code, it seems that it's using nghttp underneath and such library is a m...