To get more heap you need psram not a bigger flash. My PCB uses the WROOM formfactor, which doesn't have PSRAM: https://www.digikey.com/en/products/detail/espressif-systems/ESP32-WROOM-32E-4MB/11613125 It has 536kB SRAM... how would I use this full amount for heap, as currently ESP.getHeapSize() sa...

I have the 16mb version and I'm trying to allocate more heap, but not sure how to do it. ESP.getHeapSize() gives me 255kb ESP.getMaxAllocHeap() gives me 65kb I see this here , but is this true for just the 4mb version, or also the 16mb version as well? Due to a technical limitation, the maximum stat...

don't put S in the stack. Put it in the heap and make sure you don't write more than its size. How do I control whether S is put in the stack or heap? Plenty of web server examples that can serve files from spiffs. Thanks I'll look into it. Some code I figured out which should be 'good enough' to m...

I have a file, X, that logs events and is stored in SPIFFS. Once every few months, X fills up SPIFFS. When that happens, my software prunes older data from the log. To do this, I: - create String S - copy only the newer half of file X into string S - dump S into a new file, Y - then I delete X, usin...

I'm using the IDE setting 'Minimal SPIFFS (Large APPS with OTA)'

How do I determine how many bytes of SPIFFS is available?

Digikey is claiming different ESP32 models have different current consumptions.

Do they all relatively consume the same power, or would any version use extra low BLE transmit current?

I got an ESP32 programmed to work via BLE, and it works great with my Android cellphone. However, my Amazon Fire tablet (fully updated) just gives me this error: "Couldn't pair with my_ESP32 because of an incorrect PIN or passkey." It never asks me for a PIN, it just gives me this error as soon as I...

IMHO you should have tried this idea with one ESP32 before you went ahead and bought 1000+. The issue isn't getting it to work with one unit, it's about scalability to tens of thousands. I never said I "bought 1000+" units. And those problems were......? See links in my OP. In summary: AWS doesn't ...

I have 1000+ ESP32 units that needs to be controlled by hundreds of users via Google Home Assistant (GHA). Each unit controls a few door locks and has a 'door open' sensor that reports back. Users are non-technical so it should "just work." What would be the best way to approach this? ESP32 -> magic...

Thanks chegewara for all your work on this. Unfortunately the link didn't help me. In BLEsecurity.h, which it says "Author: chegewara", it says it can only do 6 digits: * @brief Its request from peer device to input authentication pin code displayed on peer device. * It requires that our device is c...