| // | |
| // does assigning a function pointer carry with it the associated object? | |
| // | |
| package main | |
| import "fmt" | |
| // a "function pointer" and its implementation (well, one of it) | |
| var FuncPtr func(v string) | |
| func a(v string) { |
| // | |
| // Arduino test code to read OPT3001 sensor values | |
| // https://www.ti.com/product/OPT3001 | |
| // https://www.ti.com/lit/gpn/opt3001 (datasheet) | |
| // | |
| #include <Wire.h> | |
| void setup() { | |
| // put your setup code here, to run once: |
This setup relies on having Zigbee switches, connected to zigbee2mqtt. systemd timers just publish messages to the MQTT broker and z2m acts on them.
Setup the systemd unit files, service and timers. Remember to daemon-reload afterwards.
(The names are a leftover from my 433MHz RF switch)
# head -100 /etc/systemd/system/lightswitch*
==> /etc/systemd/system/lightswitch-off.timer <==
[Unit]
| #!/usr/bin/env python | |
| # | |
| # automated ESP8266 programming station | |
| # monitors for inserted serial devices and calls esptool to flash them | |
| # written to mass flash entire batches of ESP8266 devices quickly | |
| # $ pip install esptool pyudev | |
| # | |
| # 2016.06.16 darell tan | |
| # |
| # /etc/systemd/system/wifi-powersave@.service | |
| [Unit] | |
| Description=Disables power-save on WiFI interface %I | |
| BindsTo=sys-subsystem-net-devices-%i.device | |
| After=sys-subsystem-net-devices-%i.device | |
| [Service] | |
| Type=oneshot | |
| ExecStart=/usr/bin/iw %i set power_save off |
| #!/usr/bin/env python | |
| # | |
| # extracts and parse BackupKeyBag | |
| # | |
| # 2017.02.04 darell tan | |
| # | |
| from plist import * | |
| import struct | |
| import sys |
| # | |
| # ida-analysis.py | |
| # a simple IDAPython binary analysis script | |
| # 2020.05.24 darell tan | |
| # | |
| # invoke with: | |
| # idat64 -c -A -S"ida-analysis.py $HOME/analysis.txt" <file.bin> | |
| # | |
| import sys |
| # | |
| # configuration for zigbee2mqtt ingestation | |
| # monitors all exposed devices, while ignoring the z2m bridge | |
| # | |
| [[inputs.mqtt_consumer]] | |
| servers = ["tcp://localhost:1883"] | |
| topics = ["zigbee2mqtt/#"] | |
| data_format = "json" |
| # | |
| # strip out SRT timing information, leaving only the text | |
| # separated by a single line | |
| # | |
| # 2021.10.09 darell tan | |
| # | |
| import sys | |
| with open(sys.argv[1], 'r') as f: |
| #!/usr/bin/env python | |
| # | |
| # tool to parse JFFS2 images | |
| # and more importantly, guess the erase block size | |
| # | |
| # 2015.10.19 darell tan | |
| # | |
| from struct import unpack | |
| from argparse import ArgumentParser |