From b9ac7cf457a3e7a7e4fc43c136658824b40821ad Mon Sep 17 00:00:00 2001
From: Quentin Dufour <quentin@deuxfleurs.fr>
Date: Mon, 22 Mar 2021 14:41:31 +0100
Subject: [PATCH] More doc

---
 README.md | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/README.md b/README.md
index 8c27df6..0874594 100644
--- a/README.md
+++ b/README.md
@@ -210,6 +210,31 @@ Next step: qmi-utils!
  - https://community.autopi.io/t/error-when-starting-qmi-connection/2338
  - https://lists.freedesktop.org/archives/libqmi-devel/2018-January/002707.html
 
+## ModemManager
+
+We append the following to ModemManager:
+
+```
+config interface 'broadband'
+        option device '/sys/devices/platform/soc/60f8800.usb2/6000000.dwc3/xhci-hcd.1.auto/usb3/3-1'
+        option proto 'modemmanager'
+        option apn 'free'
+        option iptype 'ipv4v6'
+```
+
+Then we can start the interface with:
+
+```
+ifup broadband
+```
+
+Both IPv6 and IPv4 should work:
+
+```
+ping openwrt.org
+ping -6 openwrt.org
+```
+
 ## Logs
 
 uboot logs: