Todd C

he/him ; cisgendered male
Sardonic Slaughterer of Sacred Cows
Old School #Forth, #Lisp, #Unix, #embedded SW & HW hacker.

[Todd C @marocddot]

I have been programming long enough (nearly 40 years) that I no longer entertain new programming languages that are less advanced than #Smalltalk, #Lisp, #Erlang
and #Forth

[Sleaford Mods @sleafordmods]

Innit

[Block Club Chicago @BlockClubCHI]

Lesbian cocktail bar Dorothy has started Silent Book Club so attendees can read in quiet camaraderie. https://t.co/izaulsdpd2

[Saul Williams @SaulWilliams]

🙏🏿💙✨✨✨ Thank you Sinéad O'Connor
https://t.co/J22mAffhhQ

[NASA @NASA]

We celebrate the contributions our LGBTQI+ colleagues have made to space exploration and aeronautics. See their stories in our #PrideMonth gallery: https://t.co/RRffWDAdQO

[BFI @BFI]

Trust me, says Mark Kermode, no words can capture what Neptune Frost is about. Best just watch it on #BFIPlayer

[Todd C @marocddot]

@jackrusher ...not enough Sturgeon too...

[Todd C @marocddot]

Programmed in #Forth, of course.

[Todd C @marocddot]

My latest home motion sensor idea: $5 of hardware (PIR,MCU,TXRF): 20 bytes (16 byte payload + CTR) -> Speck128 -> Manchester encoding -> OOK modulation @ 433MHz.. Easy right?

[Todd C @marocddot]

Sampling the PIR analog sensor 100 times per second ~ 25uA...
TX ~ 10mA.... I should get around 1 year off the AAA batteries if triggered 300 times per day ;)

[Todd C @marocddot]

debugged a subtle BLE connection problem without tearing your hair out. (2/2)

[Todd C @marocddot]

The delicate problem of IoT comms... nope, it's not done yet. LoRa, Zigbee/Thread, Wi-Fi, BLE , etc. Some are proprietary, but they are all complex and heavyweight. Yes, you can abstract a lot away in software stacks and hardware.. but raise your hand if you have ever (1/2)

[Todd C @marocddot]

@ryukinix @svetlyak40wt Yeah, uLisp just barely fits on the 8-bit megas. The "just right" size for me is the (many variants of) ESP32.

[Todd C @marocddot]

OpenBSD with ECL (Embedded Common Lisp is much, much slower than Linux with SBL (Steel Bank Lisp).

But I am building an IoT hub.

Honestly, how fast does it *need* to run?

Simpler systems FTW.

[Todd C @marocddot]

@abecedarius True. I could also do this with spare "servers" I have lying around the house...

[Todd C @marocddot]

I find myself only looking at faster laptops/desktops when I am needing to compile huge C/C++ app sources from scratch (like the ESP32 dev tree). I should probably just ask myself if I just need a faster CPU to placate these much too large code bases.... everything else I (1/2)

[Todd C @marocddot]

@svetlyak40wt Sorry, this is a system for my day job. :(
Most of my home automation revolves around ESP32 and uLisp doing all the work (with just a MQTT message queue broker on a PC as the hub).

[Todd C @marocddot]

@amszmidt I'm just talking about benchmarks (ECL vs SBCL; OpenBSD vs Linux). A typical (small to midsized) IoT gatway/hub is spending most of it's type idle (waiting for events) so my system is not necessarily slow.