OpenWrt 15.05 for Yacom Arcadyan ARV4518PW

I managed to generate a OpenWrt 15.05 image for ARV4518PW because the official one gives a kernel panic due to lack of space. The idea here is to get it running while stripping things that can be installed later with Extroot:

I had to do these steps to fit OpenWrt in less than 4 MB of that router total flash memory :

• Synced with Chaos Calmer 15.05 Final (LuCI git-15.248.30277-3836b45)
• Disabled IPv6 support (can be restored by installing IPv6 packages mainly luci-proto-ipv6 + odhcp6c)
• Removed swconfig package (because VLANs support is somehow still buggy. Wiki refs: 1, 2)
• Removed debugging (useless anyway if you're not a developer)
• Optimized compiling for size
• Enabled FPU Emulation
• Included LuCi
• Added : USB2 support + Ext4 Filesystem for Extroot + block-mount

The result is an image that fits well in ARV4518PW with 108 KB of free flash space.

Here you can download it (Pay attention to your router hardware version in its back: either R01A or R01):

• Hardware version: R01A
• For ARV4518PW R01A

or

• Hardware version: R01
• For ARV4518PW R01

Note: if you get a VFS not syncing kernel panic then check your router's MTD partitions size and probably you need to reflash a 64kb u-boot with the propre environment parameters.


what follows is just some details as a reference:

List of included packages    

$ opkg list-installed

atm-esi - 2.5.2-5

base-files - 157-r46767

block-mount - 2015-05-24-09027fc86babc3986027a0e677aca1b6999a9e14

br2684ctl - 2.5.2-5

busybox - 1.23.2-1

dnsmasq - 2.73-1

dropbear - 2015.67-1

firewall - 2015-07-27

fstools - 2015-05-24-09027fc86babc3986027a0e677aca1b6999a9e14

hostapd-common - 2015-03-25-1

iptables - 1.4.21-1

iw - 3.17-1

iwinfo - 2015-06-01-ade8b1b299cbd5748db1acf80dd3e9f567938371

jshn - 2015-06-14-d1c66ef1131d14f0ed197b368d03f71b964e45f8

jsonfilter - 2014-06-19-cdc760c58077f44fc40adbbe41e1556a67c1b9a9

kernel - 3.18.20-1-794b781336c70a9d477a86c93fdb83d7

kmod-ath - 3.18.20+2015-03-09-3

kmod-ath5k - 3.18.20+2015-03-09-3

kmod-atm - 3.18.20-1

kmod-cfg80211 - 3.18.20+2015-03-09-3

kmod-crypto-aes - 3.18.20-1

kmod-crypto-arc4 - 3.18.20-1

kmod-crypto-core - 3.18.20-1

kmod-crypto-hash - 3.18.20-1

kmod-fs-ext4 - 3.18.20-1

kmod-gpio-button-hotplug - 3.18.20-1

kmod-ipt-conntrack - 3.18.20-1

kmod-ipt-core - 3.18.20-1

kmod-ipt-nat - 3.18.20-1

kmod-leds-gpio - 3.18.20-1

kmod-ledtrig-usbdev - 3.18.20-1

kmod-lib-crc-ccitt - 3.18.20-1

kmod-lib-crc16 - 3.18.20-1

kmod-ltq-adsl-danube - 3.18.20+3.24.4.4-1

kmod-ltq-adsl-danube-fw-a - 0.1-1

kmod-ltq-adsl-danube-mei - 3.18.20-1

kmod-ltq-atm-danube - 3.18.20-1

kmod-ltq-hcd-danube - 3.18.20-1

kmod-mac80211 - 3.18.20+2015-03-09-3

kmod-nf-conntrack - 3.18.20-1

kmod-nf-ipt - 3.18.20-1

kmod-nf-nat - 3.18.20-1

kmod-nf-nathelper - 3.18.20-1

kmod-nls-base - 3.18.20-1

kmod-ppp - 3.18.20-1

kmod-pppoa - 3.18.20-1

kmod-pppoe - 3.18.20-1

kmod-pppox - 3.18.20-1

kmod-scsi-core - 3.18.20-1

kmod-slhc - 3.18.20-1

kmod-usb-core - 3.18.20-1

kmod-usb-storage - 3.18.20-1

kmod-usb2 - 3.18.20-1

libblobmsg-json - 2015-06-14-d1c66ef1131d14f0ed197b368d03f71b964e45f8

libc - 0.9.33.2-1

libgcc - 4.8-linaro-1

libip4tc - 1.4.21-1

libip6tc - 1.4.21-1

libiwinfo - 2015-06-01-ade8b1b299cbd5748db1acf80dd3e9f567938371

libiwinfo-lua - 2015-06-01-ade8b1b299cbd5748db1acf80dd3e9f567938371

libjson-c - 0.12-1

libjson-script - 2015-06-14-d1c66ef1131d14f0ed197b368d03f71b964e45f8

liblua - 5.1.5-1

libnl-tiny - 0.1-4

libpthread - 0.9.33.2-1

libubox - 2015-06-14-d1c66ef1131d14f0ed197b368d03f71b964e45f8

libubus - 2015-05-25-f361bfa5fcb2daadf3b160583ce665024f8d108e

libubus-lua - 2015-05-25-f361bfa5fcb2daadf3b160583ce665024f8d108e

libuci - 2015-04-09.1-1

libuci-lua - 2015-04-09.1-1

libxtables - 1.4.21-1

linux-atm - 2.5.2-5

ltq-adsl-app - 3.24.4.4-2

lua - 5.1.5-1

luci - git-15.248.30277-3836b45-1

luci-app-firewall - git-15.248.30277-3836b45-1

luci-base - git-15.248.30277-3836b45-1

luci-i18n-base-en - git-15.248.30277-3836b45-1

luci-i18n-firewall-en - git-15.248.30277-3836b45-1

luci-lib-ip - git-15.248.30277-3836b45-1

luci-lib-nixio - git-15.248.30277-3836b45-1

luci-mod-admin-full - git-15.248.30277-3836b45-1

luci-proto-ppp - git-15.248.30277-3836b45-1

luci-theme-bootstrap - git-15.248.30277-3836b45-1

mtd - 21

netifd - 2015-06-08-8795f9ef89626cd658f615c78c6a17e990c0dcaa

odhcpd - 2015-05-21-2ebf6c8216287983779c8ec6597d30893b914a7c

opkg - 9c97d5ecd795709c8584e972bfdf3aee3a5b846d-7

ppp - 2.4.7-6

ppp-mod-pppoa - 2.4.7-6

ppp-mod-pppoe - 2.4.7-6

procd - 2015-08-16-0da5bf2ff222d1a499172a6e09507388676b5a08

procd-nand - 2015-08-16-0da5bf2ff222d1a499172a6e09507388676b5a08

rpcd - 2015-05-17-3d655417ab44d93aad56a6d4a668daf24b127b84

ubi-utils - 1.5.1-2

ubox - 2015-07-14-907d046c8929fb74e5a3502a9498198695e62ad8

ubus - 2015-05-25-f361bfa5fcb2daadf3b160583ce665024f8d108e

ubusd - 2015-05-25-f361bfa5fcb2daadf3b160583ce665024f8d108e

uci - 2015-04-09.1-1

uhttpd - 2015-08-17-f91788b809d9726126e9cf4384fedbbb0c5b8a73

uhttpd-mod-ubus - 2015-08-17-f91788b809d9726126e9cf4384fedbbb0c5b8a73

usign - 2015-05-08-cf8dcdb8a4e874c77f3e9a8e9b643e8c17b19131

wpad-mini - 2015-03-25-1

    

$ df -h

Filesystem                Size      Used Available Use% Mounted on

rootfs                  320.0K    212.0K    108.0K  66% /

/dev/root                 3.0M      3.0M         0 100% /rom

tmpfs                    29.9M    308.0K     29.6M   1% /tmp

/dev/mtdblock5          320.0K    212.0K    108.0K  66% /overlay

overlayfs:/overlay      320.0K    212.0K    108.0K  66% /

tmpfs                   512.0K         0    512.0K   0% /dev

    

    

$ cat /proc/mtd 

dev:    size   erasesize  name

mtd0: 00010000 00002000 "uboot"

mtd1: 00010000 00010000 "uboot_env"

mtd2: 003d0000 00010000 "firmware"

mtd3: 001165fb 00010000 "kernel"

mtd4: 002b9a05 00010000 "rootfs"

mtd5: 00050000 00010000 "rootfs_data"

mtd6: 00010000 00010000 "boardconfig"

.