Edge Collective

Misc alternative radio experiments


2021-02-18 16:44:38

https://github.com/AsamK/signal-cli/wiki
signal-cli -u +18572850070 send -m "hallo from the cli again!" +17817756406
signal-cli -u +18572850070 receive

atmega1284

Using the ATmega1284 with the Arduino IDE: http://www.technoblogy.com/show?19OV

Mighty core -- https://github.com/maniacbug/mighty-1284p


2021-02-18 18:46:08

minimal mqtt -- https://hackaday.com/2021/02/17/minimal-mqtt-with-micropython/

life at bell labsl -- https://hackaday.com/2021/02/17/james-west-began-40-years-at-bell-labs-with-world-changing-microphone-tech/


2021-02-18 21:08:49

https://github.com/adafruit/Adafruit-Prototyping-Pi-Plate-PCB


2021-02-19 12:11:26

Signal

flexible e-ink

[https://www.adafruit.com/product/4262?gclid=Cj0KCQiA4L2BBhCvARIsAO0SBdYCJRlLyAq1JfBmGYGTNmRsiYjVidXXcUxDisUhWo3SYs3PJMGjKjcaAkcEEALw_wcB]

signal-cli rest api here

Node serialport

https://www.npmjs.com/package/serialport

https://serialport.io/docs/guide-usage

https://stackabuse.com/executing-shell-commands-with-node-js/

Arduino serial

Serial input basics: https://forum.arduino.cc/index.php?topic=288234.0

Stuck serialports in linux

https://www.question-defense.com/2009/09/09/how-to-reset-a-serial-port-in-linux-ttys0-ttyam0-etc


2021-02-20 09:25:50

converting unix timestamp in javascript

let unix_timestamp = 1549312452
// Create a new JavaScript Date object based on the timestamp
// multiplied by 1000 so that the argument is in milliseconds, not seconds.
var date = new Date(unix_timestamp * 1000);
// Hours part from the timestamp
var hours = date.getHours();
// Minutes part from the timestamp
var minutes = "0" + date.getMinutes();
// Seconds part from the timestamp
var seconds = "0" + date.getSeconds();

// Will display time in 10:30:23 format
var formattedTime = hours + ':' + minutes.substr(-2) + ':' + seconds.substr(-2);

console.log(formattedTime);

2021-02-27 10:04:55

Thoughts on radio setups ...

Thinking about establishing communication networks for off-grid locations ...

Cellular

Cellular coverage is spotty. If it's available, then it's a good system; it's what people are used to; but it can also be fragile to power outages.


2021-02-27 14:22:04

ideas: find the nodejs way of interpreting APRS

make a system that can get some standard message formats from internet / local lora, and combine with APRS, and show

make a 'feedmap' for belfast that shows all the gps feeds on one map


2021-02-27 14:26:27

imagery over lora -- http://ssdv.habhub.org/KW03PL


2021-02-27 15:00:48

slow scan digital imagery: http://tt7hab.blogspot.com/2018/04/the-lora-ssdv.html