From 8098af9b66ea9788444e4ba9ba0bb2fbbed542e2 Mon Sep 17 00:00:00 2001
From: mrfaptastic <12006953+mrfaptastic@users.noreply.github.com>
Date: Sun, 16 Apr 2023 14:36:57 +0100
Subject: Update README.md

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index e8bf01e..571888d 100644
--- a/README.md
+++ b/README.md
@@ -133,6 +133,8 @@ HUB75_I2S_CFG mxconfig(
 dma_display = new MatrixPanel_I2S_DMA(mxconfig);
 ```
 
+Make sure you also connect one of the HUB75 interfaces ground pins to a ground pin of the ESP32, otherwise you may get electrical artefacts on LED Matrix Panel.
+
 Various people have created PCBs for which one can simply connect an ESP32 to a PCB, and then the PCB to the HUB75 connector, such as:
 
 * Brian Lough's [ESP32 I2S Matrix Shield](http://blough.ie/i2smat/)
-- 
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