From c3d0d3cbdb331565fb54328ea3fdb755ef30b247 Mon Sep 17 00:00:00 2001
From: MarekWo <mwojtaszek@gmail.com>
Date: Thu, 15 Jan 2026 15:21:11 +0100
Subject: [PATCH] fix: Add cgroup rule for ttyACM devices (ESP32-S3)

ttyACM uses major 166, not 188 like ttyUSB.
Needed for Espressif ESP32-S3 based devices (Heltec V3, etc.)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 docker-compose.yml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/docker-compose.yml b/docker-compose.yml
index de6b4d1..bf366d2 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -6,10 +6,12 @@ services:
       dockerfile: Dockerfile
     container_name: meshcore-bridge
     restart: unless-stopped
-    # Grant access to all ttyUSB devices (major 188) for auto-detection
+    # Grant access to serial devices for auto-detection
     # This allows MC_SERIAL_PORT=auto to work without specifying device upfront
+    # Major 188 = ttyUSB (CP2102, CH340, etc.), Major 166 = ttyACM (ESP32-S3, etc.)
     device_cgroup_rules:
       - 'c 188:* rmw'
+      - 'c 166:* rmw'
     volumes:
       - "${MC_CONFIG_DIR}:/root/.config/meshcore:rw"
       - "/dev:/dev"