tl;dr -- you can skip down to summary ;) Hi All. I am trying to do some image processing on the ESP32 chip, however, I am unable to use too much heap ram. I would like to use 300kB+ if possible (more the better) in dual-core mode. I am NOT using bluetooth, and I am not using WiFi. I am using the lat...

So in LR mode, we have a possible link budget of 125dB (+20dB TX) - (-105dB RX). That is almost 18km in freespace. Even if we loose 1.5dB + 1.5dB due to pcb and antennas, we still can still expect ~12km range in freespace (line of sight NOT needed). EDIT: It seems that Espressif advertises that LR m...

Looks like esp team has added malloc support for psram, as of this commit: latest doc:

A fully functioning chip at 1.8V (flash and wifi)
(3.3v will soon go obsolete, just like 5v)

I am not an expert in that. Please open a new thread, asking about how to link and execute everything from ram.

I would skip segger, and use the wrover dev board.
J-Link is painfully slow and crashy.

Debugging is a bit of a pain... Have you tried visualgdb yet? you should be up and running in 30min https://visualgdb.com/tutorials/esp32/ Step 1: Install visual studio community and add the following plugin: http://sysprogs.com/files/visualgdb/VisualGDB-5.3-preview7.msi Step2: Enable the JTAG debug...

SomeCallMeTim wrote:Does this mean that we could, with the ESP32-D2WD, utilize UART1 at 1.8V logic to program the flash on the ESP32-D2WD part?

Very good question.
I am also interested to know the answer to this.

Hi, one solution would be to execute from ram, instead of flash. And do not use the flash at all...
Sorry to hear about this.

Is this on the D2WD chip?

ESP32 HW Additions, Wishlist
- UART on the ULP
- low power wifi (~300uA @ DTIM3, or lower?)
- better debugging!