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Lars Kellogg-Stedman larsks

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tymarbut /
Last active Jan 23, 2021
Baofeng (or other radio) data TX/RX for Raspberry Pi

This flow (and associated circuits/hardware) is designed to allow Node-RED to pass messages via radio waves in the same way as it passes messages via MQTT, using commonly-available, inexpensive handheld radios and the Raspberry Pi. The flow has been tested using Baofeng, Wouxun, and Quansheng handheld ham radios. In short, the goal is to allow packet-like transmissions between Node-RED systems over miles, while keeping the hardware costs down (or free for those hams who have surplus Baofengs hanging around). This could be used for a backup to MQTT when the Wifi is unreliable, or simply as a long-distance and network-agnostic message channel.

Prerequisites: Software

First, we need PulseAudio to make and receive sounds with our USB soundcard:

sudo apt-get install pulseaudio -y
alanhamlett /
Last active Feb 11, 2021
Serialize SQLAlchemy Model to dictionary (for JSON output) and update Model from dictionary attributes.
import uuid
import wtforms_json
from sqlalchemy import not_
from sqlalchemy.dialects.postgresql import UUID
from wtforms import Form
from wtforms.fields import FormField, FieldList
from wtforms.validators import Length
from flask import current_app as app
from flask import request, json, jsonify, abort
larsks /
Created Nov 2, 2012
Setting up Windows Server Core

Initial configuration

  • Set the timezone

      tzutil /s "Eastern Standard Time"
  • Enable automatic updates:

      cscript \windows\system32\scregedit.wsf /AU 4