At Bond Home we have several product lines based on the ESP-IDF v3.3, which we've abused to build for a simulator on POSIX and for STM32 targets. We are now attempting to upgrade to IDF 5, to take advantage of RAM optimizations and support ESP32-H2. We don't have in-house expertise in CMake, and the...

As far as I can tell, it is possible to use the raw API from a user thread if LWIP_TCPIP_CORE_LOCKING is enabled by wrapping your calls in LOCK_TCPIP_CORE / UNLOCK_TCPIP_CORE. Callbacks will occur on the tcpip thread. I'm considering using raw API in an ESP32 application. Let me explain. I currently...

I know this is ancient history at this point, but we are narrowing down a bug in our OTAU which often* results in 11 bytes missing from a TCP stream. That is, we `read` from the socket, and the total number of bytes that we are able to read is 11 less than is seen in Wireshark. Somewhere in lwIP tho...

Bump: Interested in ESP32-S3-WROVER module. We have some products using ESP32-WROVER which we need to upgrade to S2 or S3 to get External WiFi Coexistence feature. However, I'm a bit concerned about the lower internal SRAM spec on the ESP32-S2 versus the ESP32. Maybe not a problem, but would prefer ...

Thanks so much for the reply, WiFive. I don't know how I missed that reference to the S2 in the document.

A recent Espressif app note[1] describes an external coexistence feature whereby 1-, 2-, or 3-wire modes may be used to allow another 2.4 GHz radio on the same PCB to negotiate access to spectrum. Is this feature available on ESP32? Or only on ESP32-C2 and H2? How about S2? --- The document is not c...

We develop an ESP32-based line of smart home products. They use AP+STA mode for setup purpose, but also in case the Home WiFi connection is disturbed, to become available for setup again. (Compare: Google Home's behavior when internet goes out.) To toggle between AP+STA and STA-only modes, we use es...

We are getting a strong pattern of user complaints about our ESP32-based products either losing connectivity or having intermittent connectivity after either adding a wireless extender or switching to a "mesh" network such as Eero, Airport Time Capsule, and others. We run IDF v3.3.2. This is becomin...

Thank you, that is exactly what I was looking for!

(However, I note that it turns out that the 1 uS glitch I showed was being driven by another part on the board, not the ESP32.)

GPIO17 and GPIO18. Above capture was of GPIO18. We are software-rebooting the ESP32 like this: void Osal_Reboot() { SysUser("Rebooting NOW!"); Osal_Sleep_Ms(100); /* Leave the RTC slow memory powered during deep sleep. Without this, we get corruption and bootloops on PBB. */ esp_sleep_pd_config(ESP_...