Today, I wrote a small web-utility to digitize old plots. You upload an image or pdf of a plot, and extract data by clicking points on the curve. It is available at https://tools.dilawars.me/tool/plot-extractor. Why do this manually when AI can do it for you? First, because I wanted to write an utility and AI doesn’t always do a better job than a person!
This utility is a web-companion to to a somewhat popular Python utility I wrote a few back to digitize plots in batch mode.
Last week note November 8, 2025: Weekly Notes 2025/21
https://www.speedtest.net/ is great tool for learning about your internet connection speed.
If you are in a local environment, how do you figure out available bandwidth? Use cases: copying large files from one internal machine to another internal machine? Or running a local streaming service.
You can usehttps://iperf.fr/. You need two machines capable or running iperf3.
To test WiFi speed, at least one of connected via Wi-Fi. Both can also be connected by WiFi (worst case). My recommendation is to test in both cases.
iperf3 on both machines A and B.iperf3 -s on machine A or use iperf3 -s -D to keep it running as daemon. Handy if you plan to test periodically.iperf3 -c <ip_of_A> on machine B.Here is sample output at my home when both devices are connected by WiFi.
On a machine with IP 191.168.1.142, I run iperf3 in server mode.
$ iperf3 -s -D
Then on second machine
$ iperf3 -c 192.168.1.142
Connecting to host 192.168.1.142, port 5201
[ 5] local 192.168.1.131 port 38888 connected to 192.168.1.142 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 12.8 MBytes 107 Mbits/sec 0 124 KBytes
[ 5] 1.00-2.00 sec 13.2 MBytes 111 Mbits/sec 0 124 KBytes
[ 5] 2.00-3.00 sec 13.1 MBytes 110 Mbits/sec 0 124 KBytes
[ 5] 3.00-4.00 sec 13.6 MBytes 114 Mbits/sec 0 124 KBytes
[ 5] 4.00-5.00 sec 13.0 MBytes 109 Mbits/sec 0 124 KBytes
[ 5] 5.00-6.00 sec 12.6 MBytes 106 Mbits/sec 0 124 KBytes
[ 5] 6.00-7.00 sec 11.2 MBytes 94.4 Mbits/sec 0 124 KBytes
[ 5] 7.00-8.00 sec 10.4 MBytes 87.0 Mbits/sec 0 124 KBytes
[ 5] 8.00-9.00 sec 13.0 MBytes 109 Mbits/sec 0 124 KBytes
[ 5] 9.00-10.00 sec 13.1 MBytes 110 Mbits/sec 0 124 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 126 MBytes 106 Mbits/sec 0 sender
[ 5] 0.00-10.01 sec 126 MBytes 105 Mbits/sec receiver
iperf Done.
Here we go. I have some idea how fast I can transfer data between two computers on my local network.
init.sh file that you should put inside ntfy/init.sh
#!/bin/sh
ntfy serve &
sleep 2
NTFY_PASSWORD=${NTFY_PASSWORD} ntfy user add --role=admin ${NTFY_USER}
wait
compose.yaml or docker-compose.yaml file.
services:
ntfy:
image: binwiederhier/ntfy
container_name: ntfy
entrypoint: [ "/bin/sh", "/var/lib/ntfy/init.sh" ]
environment:
- TZ=UTC \# optional: set desired timezone
- NTFY_BASE_URL=https://ntfy.dilawars.me
- NTFY_AUTH_FILE=/var/lib/ntfy/auth.db
- NTFY_CACHE_FILE=/var/lib/ntfy/cache.db
- NTFY_AUTH_DEFAULT_ACCESS=deny-all
- NTFY_ATTACHMENT_CACHE_DIR=/var/lib/ntfy/attachments
- NTFY_ENABLE_LOGIN=true
- NTFY_USER=admin
- NTFY_PASSWORD=yoyodillusingh
volumes:
- /var/cache/ntfy:/var/cache/ntfy
- /etc/ntfy:/etc/ntfy
- ./ntfy/:/var/lib/ntfy
ports:
- 8001:80
healthcheck: \# optional: remember to adapt the host:port to your environment
test: ["CMD-SHELL", "wget -q --tries=1 http://localhost:80/v1/health -O - | grep -Eo '\"healthy\"\\s*:\\s*true' || exit 1"]
interval: 60s
timeout: 10s
retries: 3
start_period: 40s
restart: unless-stopped