event:2014:hacksession
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Inhaltsverzeichnis
Hacksessions
In short:
a project by exco&makefu for social interaction, hacking skills, doing stuff
Hacksessions #5
Any ideas? Just do it.
#2-4 minikrebs upgrading
exco, makefu, toerb, albi, alexander, namevergessen we learned/showed/helped each other
- different techniques how to de- resolder the chips (with old ram sticks).
- programming of the new soic-8 flash chips witha CH341A programmer (windows only, even after hack session)
- infrared soldering/hot air reflow soldering / manual smd soldering: 32MB → 64MB Ram, 4→ 16MB flash
- adding external SMA-connector for external antennas - simple and sweet hack
- dd/cat new images
- flashing openwrt
Code here - git repo:
Hardware TP-Link WR703N / WR702N / MR3020
Hardware Platform is in most cases the TP-Link WR703N / WR702N / MR3020
Upgrades (all above mentioned devices):
- possible flash-upgrade (8MB) MX25L6445EM2I / this needs new uboot → (16MB) W25Q128
- SMA connector (not: RP SMA … as in reverse pin)
## Flasher WCH CH341A
- seems not to be supported by flashrom:
- using windows software from: https://github.com/makefu/wr703_mod/tree/master/ext_documentation
- we have not made it working in a VM … with a broken usb cable as it turns out.
# uboot
- you need to upgrade uboot to be able to use new 16MB flash chip and find ART partition and more … makefu go
https://github.com/pepe2k/u-boot_mod
#crosscompiling
- get installer from: https://sourcery.mentor.com/GNUToolchain/release2640
## gui didn't seem to be working for me: as a user
- ./installer -console
- click through…
- location: $HOME/sc_mips
## add to path echo „export $PATH=$PATH:$home/sc_mips/bin“ » ~/.zshrc
## goto checked out project cd u-boot_mod make tplink_wr703n make tplink_mr3020
Buy WR703N at:
WR702N
- TP-Link wr702n 2MB EN25QH16 flash
MR3020
pics
Lessons Learned
- don't pull traces off the pcb / roy bear (killed his wr702n)
- upgrading ram chips sucks donkey balls / one-two are fine … more … no fun
- 16MB flash requires a different u-boot / makefu
- computers just suck / makefu
- sometimes an easy task just isn't that easy - even if _the internet_ tells you otherwise /all
- a 150mil sop8 programming adapter won't fit a 200mil chip
- blinking led's are awesome / albi
- barbecue takes too much time away from your hacking session / albi
- rp SMA is not the plug you want
#1: Soundflower
event/2014/hacksession.1395362801.txt.gz · Zuletzt geändert: 2014-03-21 01:46 von 78.42.84.17