Library is preventing the use of long arrays

[mmzeynalli]

Recently I do simple project where I send pixel data from RaspberryPi via UART. In this project, I created array of ~1000 length (screens are 3x5, it makes around 960 bytes of data). First I created it dynamically via calloc, and memory allocation failed. Changing array to static did not change anything. Then, I removed array and tried to increase Arduino buffer size instead. However, even though I have enough buffer size, my code even wont print something to the Serial (and I am not talking about RPi - Arduino yet).

P. S. There is the same issue in original DMD library, and I opened issues in both of them

[PozitronikTech]

I think the wacthdog intervenes because the time during uart sending is too long. For this reason, communication may not be possible. My suggestion, you can try sending piece by piece?

[mmzeynalli]

The problem is, I can't create large array, before sending/receiving smth. Can creation of 960 length static array cause wdt reset?

[PozitronikTech]

I think you should try this.