Skip to content

Use PSRAM to reduce heap usage percentage on ESP32 with PSRAM #8891

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We鈥檒l occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
thebentern merged 5 commits into from
Dec 10, 2025
Merged

Use PSRAM to reduce heap usage percentage on ESP32 with PSRAM #8891

Show file tree
Hide file tree
Changes from 4 commits
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
5e0ecf9
Use PSRAM for malloc > 256bytes to get more heap memory
samm-git Dec 7, 2025
a59a0e2
Use dynamic allocator on boards with PSRAM to free more heap
samm-git Dec 7, 2025
58c5724
Apply suggestion from @Copilot
thebentern Dec 7, 2025
c25e73f
Move heap_caps_malloc_extmem_enable() to the top of the init
samm-git Dec 8, 2025
1bba9b4
Update src/main.cpp
samm-git Dec 8, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
5 changes: 5 additions & 0 deletions src/main.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -439,6 +439,11 @@ void setup()

LOG_INFO("\n\n//\\ E S H T /\\ S T / C\n");

#if defined(ARCH_ESP32) && defined(BOARD_HAS_PSRAM)
// use PSRAM for malloc calls > 256 bytes
heap_caps_malloc_extmem_enable(256);
Comment thread
samm-git marked this conversation as resolved.
Outdated
#endif

#if defined(DEBUG_MUTE) && defined(DEBUG_PORT)
DEBUG_PORT.printf("\r\n\r\n//\\ E S H T /\\ S T / C\r\n");
DEBUG_PORT.printf("Version %s for %s from %s\r\n", optstr(APP_VERSION), optstr(APP_ENV), optstr(APP_REPO));
Expand Down
4 changes: 2 additions & 2 deletions src/mesh/Router.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -37,8 +37,8 @@

static MemoryDynamic<meshtastic_MeshPacket> dynamicPool;
Allocator<meshtastic_MeshPacket> &packetPool = dynamicPool;
#elif defined(ARCH_STM32WL)
// On STM32 there isn't enough heap left over for the rest of the firmware if we allocate this statically.
#elif defined(ARCH_STM32WL) || defined(BOARD_HAS_PSRAM)
// On STM32 and boards with PSRAM, there isn't enough heap left over for the rest of the firmware if we allocate this statically.
// For now, make it dynamic again.
#define MAX_PACKETS \
(MAX_RX_TOPHONE + MAX_RX_FROMRADIO + 2 * MAX_TX_QUEUE + \
Expand Down
Loading