# Problem with P2-1515-128X64-32S-S2 Matrix **URL:** https://rpi-rgb-led-matrix.discourse.group/t/problem-with-p2-1515-128x64-32s-s2-matrix/948 **Category:** Uncategorized **Created:** [December 16, 2024, 5:01pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/problem-with-p2-1515-128x64-32s-s2-matrix/948 "2024-12-16T17:01:44Z") **Posts on this page:** 8 **Page:** 1
### Author: ![moustacheaexl](https://avatars.discourse-cdn.com/v4/letter/m/ec9cab/32.png) [@moustacheaexl](https://rpi-rgb-led-matrix.discourse.group/u/moustacheaexl) #### Post date: [December 16, 2024, 5:01pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/problem-with-p2-1515-128x64-32s-s2-matrix/948/1 "2024-12-16T17:01:44Z")
Hi, I got a P2-1515-128X64-32S-S2 Matrix but it seems that only half of the rows is being adressed. This is my command: sudo ./demo -D 0 --led-cols=128 --led-rows=64 --led-row-addr-type=0 --led-brightness=100 I also tested all variations of address types and multiplexing options. The line above gave me the best output so far. Which gives me this output: ![WhatsApp Image 2024-12-16 at 18.00.37](https://global.discourse-cdn.com/free1/uploads/rpi_rgb_led_matrix/original/1X/e5f214dec6a9fb193826a17fae669687b61882cf.jpeg) Here’s a picture of the back of the panel: ![WhatsApp Image 2024-12-13 at 07.33.48](https://global.discourse-cdn.com/free1/uploads/rpi_rgb_led_matrix/original/1X/d4d249061a984bde65fde973aa931d825df3aefb.jpeg) The panel did work with another library with an esp32 so the panel itself should be good. Happy to get your advice, thanks! ---
### Author: ![board707](https://avatars.discourse-cdn.com/v4/letter/b/bc79bd/32.png) [@board707](https://rpi-rgb-led-matrix.discourse.group/u/board707) #### Post date: [December 17, 2024, 12:01pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/problem-with-p2-1515-128x64-32s-s2-matrix/948/2 "2024-12-17T12:01:23Z")
please test the connection of pin C ---
### Author: ![moustacheaexl](https://avatars.discourse-cdn.com/v4/letter/m/ec9cab/32.png) [@moustacheaexl](https://rpi-rgb-led-matrix.discourse.group/u/moustacheaexl) #### Post date: [December 17, 2024, 12:43pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/problem-with-p2-1515-128x64-32s-s2-matrix/948/3 "2024-12-17T12:43:15Z")
What do you mean by that? I just double checked that it’s connected to the correct pin. ---
### Author: ![board707](https://avatars.discourse-cdn.com/v4/letter/b/bc79bd/32.png) [@board707](https://rpi-rgb-led-matrix.discourse.group/u/board707) #### Post date: [December 17, 2024, 12:57pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/problem-with-p2-1515-128x64-32s-s2-matrix/948/4 "2024-12-17T12:57:11Z")
According to the picture, you have a problems with connection of line switching pins A-E, most probably with C. It might be a loose connections, a bad soldering on the Raspberry or on the LED panel, or an issue with a cable. Try to change the board, panel and cable if you have another ones. ---
### Author: ![board707](https://avatars.discourse-cdn.com/v4/letter/b/bc79bd/32.png) [@board707](https://rpi-rgb-led-matrix.discourse.group/u/board707) #### Post date: [December 17, 2024, 1:01pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/problem-with-p2-1515-128x64-32s-s2-matrix/948/5 "2024-12-17T13:01:28Z")
@moustacheaexl Could you read an ID on chips Q5 and Q6 of the panel? ---
### Author: ![moustacheaexl](https://avatars.discourse-cdn.com/v4/letter/m/ec9cab/32.png) [@moustacheaexl](https://rpi-rgb-led-matrix.discourse.group/u/moustacheaexl) #### Post date: [December 17, 2024, 1:12pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/problem-with-p2-1515-128x64-32s-s2-matrix/948/6 "2024-12-17T13:12:27Z")
Thats’s a good point. I’ll swap the raspberry to another one. I tested the panel with an esp and that works without a problem. So the panel itself should be good. ---
### Author: ![marcmerlin](https://yyz2.discourse-cdn.com/free1/user_avatar/rpi-rgb-led-matrix.discourse.group/marcmerlin/32/40_2.png) [@marcmerlin](https://rpi-rgb-led-matrix.discourse.group/u/marcmerlin) #### Post date: [December 18, 2024, 4:43pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/problem-with-p2-1515-128x64-32s-s2-matrix/948/7 "2024-12-18T16:43:39Z")
you are indeed missing an address line (I originally said E but it could be C). Check your connection board and make sure all 5 address pins are connected ---
### Author: ![weins3](https://avatars.discourse-cdn.com/v4/letter/w/c68b51/32.png) [@weins3](https://rpi-rgb-led-matrix.discourse.group/u/weins3) #### Post date: [January 31, 2025, 10:59am UTC](https://rpi-rgb-led-matrix.discourse.group/t/problem-with-p2-1515-128x64-32s-s2-matrix/948/8 "2025-01-31T10:59:59Z")
In your matrix adapter need solder a pin, in your panel E its the pin 8, then you need solder in the adaptor the E pin with pin 8. See this ![603622939dfc411114e3e94bc95f44e675b3bea3_2_375x500](https://global.discourse-cdn.com/free1/uploads/rpi_rgb_led_matrix/original/1X/d30d34cf68842e4f98436cfc23cbd07d4b01ef6d.jpeg) in this adaptor the pin 4 its conected to gnd and the pin 8 to E. See this link: > **[Adafruit RGB Matrix + Real Time Clock HAT for Raspberry Pi](https://learn.adafruit.com/adafruit-rgb-matrix-plus-real-time-clock-hat-for-raspberry-pi/driving-matrices#step-2982421)** > > You can now create a dazzling display with your Raspberry Pi with the Adafruit RGB Matrix HAT. This HAT plugs into your Pi and makes it super easy to control RGB matrices such as those we stock in the shop and create a colorful scrolling display or...