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Hal Martin 88f3c67eb2 ipq40xx: add support for Cisco Meraki MR70 
This commit adds support for the Cisco Meraki MR70/Go GR60.

The Meraki MR70 is a Cisco 802.11ac/WiFi 5 outdoor AP with 1 Ethernet port.
It can be powered by a 12V DC barrel jack (5.5x2.5mm, center positive)
or via 802.3af POE.

The Meraki Go GR60 (codename: Dungbeetle Omni) is identical to the MR70
(codename: Toe Biter Omni), so this document will refer to both devices
as the MR70.

MR70 hardware info:
* CPU: Qualcomm IPQ4029
* RAM: 256MB DDR3
* Storage: 128 MB (TSOP48 NAND, 3.3V)
* Networking: 1 Gigabit Ethernet
* WiFi: QCA4019 802.11b/g/n/ac
* Serial: Internal header (J10, 2.54mm, unpopulated)

This device ships with secure boot, and cannot be flashed without
external programmers (TSOP48 NAND and I2C EEPROM)!

Disassembly:

Note: This is an outdoor device that is ultrasonically welded and glued
to weather seal it. Disassembly will compromise the weather seal!

Start by removing the product label on the rear metal mounting plate.
There are four Torx T8 screws under the sticker, remove the screws and
the mounting plate. Remove the two Philips screws under the plate.

Using a chisel (or razor blade) and hammer, cut around the circumfrence
of the device. You need to cut through approximately 2mm of
ultrasonically welded plastic.

After cutting through the plastic, heat the device using a hair drier
(or similar) to soften the glue. A heatgun is NOT recommended as
it will damage the plastic. It is only required to heat the device until
warm (~40C-50C).

Using a plastic pry tool, insert it along the cut you made around
the edge and gently separate.  Insert a guitar pick into the opening
while gently lifting the front to cut the glue. The device is glued around
the entire circumfrence.

Once you have removed the plastic front, remove the 4 Philips screws
holding down the main PCB. Release the two WiFi antennas by gently
bending the antenna PCBs to the middle of the unit and pulling up.

Lift the top of the PCB gently while pushing the Ethernet port into the
housing to release it. Turn the PCB over and remove the three Philips
screws holding the metal heat spreader.

The TSOP48 NAND flash (U9, S34ML01G200 or W29N01HV) is located
under the metal heat spreader.

To flash, you need to desolder the TSOP48 or use a 360 clip.

You also need to reprogram the I2C EEPROM (U20, Atmel 24c64). It is not
necessary to desolder the I2C EEPROM, a ch341a USB programmer and SOP-8
clip are inexpensive (~$10) and work well.

Installation:

The dumps to flash can be found in this repository:
https://github.com/halmartin/meraki-openwrt-docs/tree/main/mr70_gr60

The device has the following flash layout (offsets with OOB data):
```
0x000000000000-0x000000100000 : "sbl1"
0x000000100000-0x000000200000 : "mibib"
0x000000200000-0x000000300000 : "bootconfig"
0x000000300000-0x000000400000 : "qsee"
0x000000400000-0x000000500000 : "qsee_alt"
0x000000500000-0x000000580000 : "cdt"
0x000000580000-0x000000600000 : "cdt_alt"
0x000000600000-0x000000680000 : "ddrparams"
0x000000700000-0x000000900000 : "u-boot"
0x000000900000-0x000000b00000 : "u-boot-backup"
0x000000b00000-0x000000b80000 : "ART"
0x000000c00000-0x000007c00000 : "ubi"
```

* Dump your original NAND (if using nanddump, include OOB data).

* Decompress `u-boot.bin.gz` dump from the GitHub repository above (dump
contains OOB data) and overwrite the `u-boot` portion of NAND from
`0x738000`-`0x948000` (length `0x210000`). Offsets here include OOB data.

* Decompress `ubi.bin.gz` dump from the GitHub repository above (dump
contains OOB data) and overwrite the `ubi` portion of NAND from
`0xc60000-0x7fe0000` (length `0x7380000`). Offsets here include OOB data.

* Dump your original EEPROM. Change the byte at offset `0x49` to `0x1e`
(originally `0x2d` or `0x26`). Remember to re-write the EEPROM with the
modified data.

        * This can be done on Linux via the following command:
    `printf "\x1e" | dd of=/tmp/eeprom.bin bs=1 seek=$((0x49)) conv=notrunc`

**Note**: the device will not boot if you modify the board major number and
have not yet overwritten the `ubi` and `u-boot` regions of NAND.

* Resolder the NAND after overwriting the `u-boot` and `ubi` regions.

OpenWrt Installation:

* After flashing NAND and EEPROM with external programmers. Plug in an
Ethernet cable and power up the device.

* The new U-Boot build uses the space character `" "` (without quotes) to
interrupt boot.

* Interrupt U-Boot and `tftpboot` the OpenWrt initramfs image from your
tftp server
```
dhcp
setenv serverip <your_tftp>
tftpboot openwrt-ipq40xx-generic-meraki_mr70-initramfs-uImage.itb
```

* Once booted into the OpenWrt initramfs, created the `ART` ubivol with
the WiFi radio calibration from the mtd partition:
```
cat /dev/mtd10 > /tmp/ART.bin
ubiupdatevol /dev/ubi0_1 /tmp/ART.bin
```

* `scp` the `sysupgrade` image to
the device and run the normal `sysupgrade` procedure:
```
scp -O openwrt-ipq40xx-generic-meraki_mr70-squashfs-sysupgrade.bin root@192.168.1.1:/tmp/
ssh root@192.168.1.1 "sysupgrade -n /tmp/openwrt-ipq40xx-generic-meraki_mr70-squashfs-sysupgrade.bin"
```

* OpenWrt should now be installed on the device.

Signed-off-by: Hal Martin <hal.martin@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/22050
Signed-off-by: Robert Marko <robimarko@gmail.com>
2026-02-18 19:14:57 +01:00
.devcontainer/ci-env devcontainer: Add development environment for gihub codespace 2023-10-30 23:34:26 +01:00
.github ci: rework and move build-on-comment action 2026-01-16 18:42:20 +07:00
.vscode meta: VS Code: add "Git: Always Sign Off" setting 2024-10-03 17:18:51 +02:00
config microchipsw: enable DCB by default 2026-01-25 22:10:22 +01:00
include build: pass CPPFLAGS to cmake build 2026-02-17 01:29:57 +01:00
LICENSES LICENSES: include all used licenses in LICENSES directory 2021-02-14 19:21:38 +01:00
package ucode-mod-bpf: add CPPFLAGS 2026-02-17 22:25:31 +01:00
scripts scripts: update malta kernel path in qemustart 2026-02-11 00:08:34 +01:00
target ipq40xx: add support for Cisco Meraki MR70 2026-02-18 19:14:57 +01:00
toolchain fortify-headers: fix -Werror=format-nonliteral in fortify/stdio.h 2026-02-17 01:29:51 +01:00
tools tools: m4: update to 1.4.21 2026-02-13 16:56:37 +01:00
.gitattributes gitattributes: automatically convert dts file CRLF line endings to LF 2025-11-29 17:52:35 +01:00
.gitignore gitignore: ignore local APK keys 2024-05-17 22:03:06 +03:00
BSDmakefile build: use SPDX license tags 2021-02-05 14:54:47 +01:00
Config.in build: scripts/config - update to kconfig-v5.14 2022-02-19 13:10:01 +01:00
COPYING COPYING: add COPYING file to specify project licenses 2021-02-14 19:21:38 +01:00
feeds.conf.default feeds: revert to git.openwrt.org 2026-01-09 21:55:00 +01:00
Makefile build: include tests/Makefile if available 2024-06-17 17:51:31 +02:00
README.md README: replace "MacOSX" with "macOS" 2024-04-01 18:46:30 +02:00
rules.mk rules.mk: add DEPRECATION NOTICE for AUTORELEASE 2025-10-29 21:09:57 +01:00

README.md

OpenWrt logo

OpenWrt Project is a Linux operating system targeting embedded devices. Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the vendor and allows you to customize the device through the use of packages to suit any application. For developers, OpenWrt is the framework to build an application without having to build a complete firmware around it; for users this means the ability for full customization, to use the device in ways never envisioned.

Sunshine!

Download

Built firmware images are available for many architectures and come with a package selection to be used as WiFi home router. To quickly find a factory image usable to migrate from a vendor stock firmware to OpenWrt, try the Firmware Selector.

If your device is supported, please follow the Info link to see install instructions or consult the support resources listed below.

An advanced user may require additional or specific package. (Toolchain, SDK, ...) For everything else than simple firmware download, try the wiki download page:

Development

To build your own firmware you need a GNU/Linux, BSD or macOS system (case sensitive filesystem required). Cygwin is unsupported because of the lack of a case sensitive file system.

Requirements

You need the following tools to compile OpenWrt, the package names vary between distributions. A complete list with distribution specific packages is found in the Build System Setup documentation.

binutils bzip2 diff find flex gawk gcc-6+ getopt grep install libc-dev libz-dev
make4.1+ perl python3.7+ rsync subversion unzip which

Quickstart

  1. Run ./scripts/feeds update -a to obtain all the latest package definitions defined in feeds.conf / feeds.conf.default

  2. Run ./scripts/feeds install -a to install symlinks for all obtained packages into package/feeds/

  3. Run make menuconfig to select your preferred configuration for the toolchain, target system & firmware packages.

  4. Run make to build your firmware. This will download all sources, build the cross-compile toolchain and then cross-compile the GNU/Linux kernel & all chosen applications for your target system.

Related Repositories

The main repository uses multiple sub-repositories to manage packages of different categories. All packages are installed via the OpenWrt package manager called opkg. If you're looking to develop the web interface or port packages to OpenWrt, please find the fitting repository below.

  • LuCI Web Interface: Modern and modular interface to control the device via a web browser.

  • OpenWrt Packages: Community repository of ported packages.

  • OpenWrt Routing: Packages specifically focused on (mesh) routing.

  • OpenWrt Video: Packages specifically focused on display servers and clients (Xorg and Wayland).

Support Information

For a list of supported devices see the OpenWrt Hardware Database

Documentation

Support Community

  • Forum: For usage, projects, discussions and hardware advise.
  • Support Chat: Channel #openwrt on oftc.net.

Developer Community

License

OpenWrt is licensed under GPL-2.0