James Hagerman JamesHagerman

Baofeng UV-5R Channel save steps

Buttons Overview

VFO/MR - Toggle Mode: Frequency mode vs Channel mode
A/B - Toggle Side/Display: A(top) or B(bottom)
BAND - Toggle Band: 144-148MHz/VHF/2m or 420-450MHz/UHF/70cm
MENU - Handle Menu options. Duh, mostly.

Main screen buttons

Electron App dev notes

So far, this is the best basic intro: https://github.com/electron/electron-api-demos

This is the simplest starter example: https://github.com/electron/electron-quick-start

And this seems to be the best, reasonably complete, React based boilerplate: https://github.com/chentsulin/electron-react-boilerplate

Useful plugins for the future

Adding BMP support to radare2

Being able to do dynamic analysis on embedded targets over SWDP and JTAG is a pretty big win. The Black Magic Probe (BMP) is an amazing hardware platform to allow this type of work.

Radare2 (r2) has a fairly large amount of support for a wide variety of tasks including dynamic analysis.

Getting the two to work together would be an amazing gift to the community.

TODOs:

Issue (resolved! See comments!)

As a test, I compiled the 1bitsy miniblink example (from https://github.com/1Bitsy/1bitsy-examples) using:

make miniblink.bin

Decompile of address 0x1ac using arm-none-eabi-objdump -d miniblink.bin gets me

Disassembling 1bitsy examples using radare2

Note that because radare2 uses Capstone to disassemble ARM code, there are issues with the disassembly. arm-none-eabi-objdump -d compiledbinary.elf actually does a better job in some cases. For example, msr isn't decompiled correctly...

First, you have to either strip the default ELF binaries the default Makefiles build when you run make OR you need to just compile .bin files using something like:

make binaryname.bin

How to setup hostapd based router

Install some tools you'll need with: apt-get install -y hostapd dnsmasq wireless-tools iw wvdial

Note that some wifi cards just plain don't work with hostapd. Sorry.

Setup your network interfaces correctly

This is done in /etc/network/interfaces:

LayerOne 2017 Badge Notes

The badge for LayerOne 2017 runs on an STM32 ARM embedded microprocessor. Most of the notes about this board can be dug out of CharlieX's page on Hackaday.io: https://hackaday.io/project/13262-layerone-2017

Known bugs

Yes, there are a few. Word on the street is that when the original code is compiled under Linux, the USB doesn't enumerate! There is a fix for this... but then the SD card doesn't work correctly

PLEASE let me know if you figure out what could be causing this!

Convert some stuff...

This uses:

https://hub.docker.com/r/jagregory/pandoc/

PDF

docker run -v `pwd`:/source jagregory/pandoc -f markdown_github -t latex --latex-engine=xelatex all-notes.md -o allnotes.pdf

	[0x08000224]> db 0x00000214
	Cannot place a breakpoint on 0x00000214 unmapped memory. See e? dbg.bpinmaps
	[0x08000224]> e dbg.bpinmaps=false
	[0x08000224]> db 0x00000214
	[0x08000224]> dc
	Selecting and continuing: 0
	= attach 0 0
	got signal...
	= attach 0 1
	= attach 6 1

	#!/bin/bash

	logger "Telling kernel to turn on ipv4 ip_forwarding"
	echo 1 > /proc/sys/net/ipv4/ip_forward
	logger "Done. Setting up iptables rules to allow FORWARDING"

	DOWNSTREAM=wlan0 # wlan0 is client network (running hostapd)
	UPSTREAM=eth0 # eth0 is upstream network (internet)

	# Allow IP Masquerading (NAT) of packets from clients (downstream) to upstream network (internet)