Outdoor panel with 16207S driver low brightness

[jwee1369]

Hi,

I have one 64x64 panel with 16207S, for the most part the library works and i tried with the setup below:

in the first image - when the panel is filled with blue, everything is connected and working as expected.

In the second image - However, one time i accidentally unplug my ESP32 MCU from the power source, i noticed, the 4 lines (in blue) but they happened to be brighter (this is the brightness i am trying to achieve) - works good under sunlight

Any explanation or solution to achieve the (right) brightness with four lines?

Some things I have tried:

1. decrease increase brightness - works as expected
2. increase refresh_rate to 100 - no effect
3. define PIXEL_COLOR_DEPTH_BITS 12

Appreciate your help and thanks

` HUB75_I2S_CFG::i2s_pins _pins={R1_PIN, G1_PIN, B1_PIN, R2_PIN, G2_PIN, B2_PIN, A_PIN, B_PIN, C_PIN, D_PIN, E_PIN, LAT_PIN, OE_PIN, CLK_PIN};

HUB75_I2S_CFG mxconfig( PANEL_RES_X*2,
PANEL_RES_Y/2,
NUM_ROWS * NUM_COLS,
_pins, // Uncomment to enable custom pins HUB75_I2S_CFG::ICN2038S );

mxconfig.i2sspeed = mxconfig.HZ_20M; / mxconfig.min_refresh_rate = 10; mxconfig.clkphase = false; // Change this if you see pixels showing up shifted wrongly by one column the left or right.

dma_display = new MatrixPanel_I2S_DMA(mxconfig); if( not dma_display->begin() ) Serial.println("****** !KABOOM! I2S memory allocation failed ***********");

dma_display->setBrightness8(255); // range is 0-255, 0 - 0%, 255 - 100% dma_display->clearScreen(); delay(500);

virtualDisp = new VirtualMatrixPanel((*dma_display), NUM_ROWS, NUM_COLS, PANEL_RES_X, PANEL_RES_Y); virtualDisp->setPhysicalPanelScanRate(FOUR_SCAN_64PX_HIGH);

virtualDisp->fillScreen(virtualDisp->color565(0, 0, 255)); `