# Help with P3 64X64 panels **URL:** \ **Category:** Uncategorized\ **Created:** [July 13, 2022, 6:05am UTC](https://rpi-rgb-led-matrix.discourse.group/t/help-with-p3-64x64-panels/543 "2022-07-13T06:05:34Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![monoelectro](https://avatars.discourse-cdn.com/v4/letter/m/7cd45c/32.png) [@monoelectro](https://rpi-rgb-led-matrix.discourse.group/u/monoelectro)\ **Post date:** [July 13, 2022, 6:05am UTC](https://rpi-rgb-led-matrix.discourse.group/t/help-with-p3-64x64-panels/543/1 "2022-07-13T06:05:34Z")
Hello all, I am trying to use a P3 64x64 panel bought in aliexpress with this library. The panel has A,B,C and E pins and I connected them based on description under 🙂 > Remark: I am using direct jumpers to connect the panel and rpi gpio 1. I understand this library supports 64x64 panels right ? 2. The panel does not have a D pin. Is there any special connection required? 3. Is there any special parameter to be modified ( number of rows) while calling the examples ? I get the colorful square displayed , but there are black bars displayed in between. Thanks in advance for any hint or link. Cheers ---
**Author:** ![drewsipher](https://avatars.discourse-cdn.com/v4/letter/d/cdc98d/32.png) [@drewsipher](https://rpi-rgb-led-matrix.discourse.group/u/drewsipher)\ **Post date:** [July 16, 2022, 1:39pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/help-with-p3-64x64-panels/543/2 "2022-07-16T13:39:20Z")
Sometimes the panels dont label the pins properly. Check tge GND pin in the middle, and wether its connected to the other two grounds. That is likely to be your D pin ---
**Author:** ![monoelectro](https://avatars.discourse-cdn.com/v4/letter/m/7cd45c/32.png) [@monoelectro](https://rpi-rgb-led-matrix.discourse.group/u/monoelectro)\ **Post date:** [July 16, 2022, 5:44pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/help-with-p3-64x64-panels/543/3 "2022-07-16T17:44:07Z")
thanks for the hint. Just checked that yesterday. One pin labeled as GND has no continuity to other grounds. I assume it is the D pin. Connected to respective rpi pin, but still same problem. Will test tomorrow the panel with other libraries (esp and arduino) I assume those will work, will update the thread after my results. Any other hint about configuration for this panel? ---
**Author:** ![monoelectro](https://avatars.discourse-cdn.com/v4/letter/m/7cd45c/32.png) [@monoelectro](https://rpi-rgb-led-matrix.discourse.group/u/monoelectro)\ **Post date:** [July 17, 2022, 4:53am UTC](https://rpi-rgb-led-matrix.discourse.group/t/help-with-p3-64x64-panels/543/4 "2022-07-17T04:53:37Z")
Short update on this topic. Was able to use this panel with other controller and library. > **[GitHub - mrfaptastic/ESP32-HUB75-MatrixPanel-I2S-DMA: An Adafruit GFX...](https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-I2S-DMA#1-library-installation)** > > An Adafruit GFX Compatible Library for the original ESP32, to drive 64x32px or 64x64px HUB75 LED matrix modules using the ESP32's DMA engine for high refresh rates. Supports panel chaining. - G... Required modifications: - change number of rows and columns to 64 - number of panels set to 2 - connect wrong labeled pin to E control pin in esp32 board - assign number to E pin on board configuration I tried to use equivalent setup with rpi library. Unfortunately, was not able to get a positive result would really appreciate any hint ---
**Author:** ![monoelectro](https://avatars.discourse-cdn.com/v4/letter/m/7cd45c/32.png) [@monoelectro](https://rpi-rgb-led-matrix.discourse.group/u/monoelectro)\ **Post date:** [July 17, 2022, 2:00pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/help-with-p3-64x64-panels/543/5 "2022-07-17T14:00:20Z")
And… issue solved, did not understand really why though… For guys facing same problem. Use an Adafruit RGB Bonnet adaptor or create your own cable harness ( I did it so) For pin mapping use definition under: > ‘adafruit-hat’ It did not work for me with option ‘regular’ hope it helps somebody else. Cheers