High RAM usage of Arduino_BHY2 library.

[hkayan]

I appreciate if someone can explain why this library consumes so much ram.

Here is the empty sketch usage:

RAM: [= ] 12.0% (used 7720 bytes from 64288 bytes) Flash: [= ] 7.6% (used 40184 bytes from 527616 bytes)

If I include Arduino_BHY2:

RAM: [====== ] 55.5% (used 35672 bytes from 64288 bytes) Flash: [===== ] 50.8% (used 267952 bytes from 527616 bytes)

As, I am trying to run my ML model, I am having diffuculties regarding RAM availability.

What are my options?

Best Regards,

[BSTRobin · Accepted solution]

Hi hkayan，

ArduinoBLE lib takes most of the memory.
When only include the ArduinoBLE.h in a simple script:

#include "ArduinoBLE.h"

// Set DEBUG to true in order to enable debug print#define DEBUG false
void setup()
{#if DEBUG
Serial.begin(115200);
#endif
}
void loop()
{
}

Then memory cost is shown as:
Sketch uses 243580 bytes (46%) of program storage space. Maximum is 527616 bytes.
Global variables use 32784 bytes (50%) of dynamic memory, leaving 31504 bytes for local variables. Maximum is 64288 bytes.

Do you use BLE function? If no, you can remove the BLE dependency in our Arduino_BHY2 lib.

[hkayan]

Hi @BSTRobin,

Many thanks for the answer. Yes, I need the BLE as update NIcla via Portenta over BLE.

Seems like I need to manually dig to reduce the usage, or do you have any other suggestions?

[BSTRobin]

Hi hkayan，

For optimizing Arduino BLE library, you can refer to the discussions on the Arduino forum, such as: https://forum.arduino.cc/t/how-to-minimize-library-size/878586