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Advanced strand:  from “running commands” → “thinking like a system admin / engineer” internal vs. global dns NAT outbound and inbound port forwarding  private addresses look in known_hosts file, repairs why MTM warnings matter mulit-hop remote access (cuckoo’...

Module 4: web server and web pages (html) see also https://elab.hpa.edu/cs/TC/TC%205.0%20HTML.pdf Background: html stands for hypertext markup language it is a markup language, not really programming like python or C it manages how information is presented ("m...

Module 3: Internet Your computer needs 4 things to be able to get onto the internet: IP address, example 10.14.8.4 Subnet mask, example 255.255.0.0 Gateway/router, example 10.14.0.1 Domain name server (DNS), example 10.9.250.13 Here's what each one does: IP ad...

As a computer engineer, you will doubtless be asked to setup a home router for your home or one of your friends (you could even make a job of it). Definition of terms: Router: anything that converts one physical form of data transmission like a cable modem or ...

Let's start with your wifi connection: On your mac, find the wifi icon on the upper right: Screenshot 2026-04-29 at 7.43.13 AM.png Hold option and click on the icon, you should see this: Screenshot 2026-04-29 at 7.21.17 AM.png Let's decode this a bit: IP addre...

Capture the flag challenge: You will hide an encrypted message in each of your pi400 computers connected wirelessly to the router you setup with a hidden wifi network. The challenge is for your hacker friends to do the following: find your wifi network (it may...

Mesh wikiA sharing repository for documents, solutions, news and applicationsFor questions contact bill@hpa.edu, sysadmin Meshtastic: a mesh communication solution using unlicensed radio bands to share text messages with users via bluetooth to phones and compu...

Equipment:Three levels: all should be accessible via bluetooth at least consumer-no tech involved: casual users, hikers etc. hobbyist-some tech, more capabilities explorer-expanding capacityLevel 1: consumerSenseCap tracker: credit card format limited range (i...

Antennas: (see also notes on propagation) There are essentially 4 types of external antennas possible, beyond the internal ones on some devices: whip (stick) antenna: look for screw on with no internal wiring, needs ground plane whip dipole antenna: much bette...

High power units include the Station G2 and Portduino units (30dB) Station G2: esp32-s3 chip includes wifi, but disables BLE when active monitoring screen with FW 2.7 has many display options 30 dB power amplifier (need to reduce input power from the ESP32 chi...

This page is in progress, will include notes on command line admin of nodes Migrated from Apple Server Wiki. Original page ID: U3R7U8j6

Random tips you might find useful: 6.5.25 there are essentially two types of devices: esp32 and RAK devices ESP32 devices can use wifi, RAK cannot without additional modules upgrading firmware on RAK devices is done as a drive you drop firmware onto, using the...

Setup: updated 7.7.25Here are a set of screenshots from a typical mesh setup I have. Most devices fall into one of two categories: RAK 19007 boards and ESP32 boards. Both can be programmed initially using a chrome browser to flash and update the firmware.After...

Meshsense: Meshsense is the best tool for managing multiple units, as well as deep info into your own mesh unit. It is NOT a configuration utility, though it can read config files for confirmation. It IS an excellent dashboard for multiple mesh units with link...

Assumes 5 solar hours per day at 20° latitude Panel options: <1W RAK IP66 case 3W RAK case, flex panel 6W Flex usb and  soshine 6V panel 40W flex panel Case options: RAK prebuilt case (3W or 1W) IP66 plastic case screw on j-box (not recommended, except where t...

viewshed programs: caltopo, others long-fast: why, who is not using it, why mqtt: why, why not, history hardware:lorawan vs. meshtastic antennas: 915 vs. 906 (meshtastic) meshsense bluetooth access vs. microwave esp32 wifi access IP lockout: esp32, eth0 config...

You can search by using command-F or control-F To add your node, email bill@hpa.edu Bill's units: 6.24.25 4294: HPA T-beam: wifi  new battery, web be48: T-beam supreme: wifi new battery web 192.168.3.124 (bad bt?) b004: T-beam spec5: wifi, battery web 8780: T-...

Getting from here to there-how and why Two terms will show up if you are looking at nodes on your device, or more useful, one of the local meshsense stations: RSSI: received signal strength (how loud do I hear you) SNR: signal to noise radio (how noisy are the...