https://ukhas.net/wiki/ 2026-04-07T17:25:16+00:00 https://ukhas.net/wiki/ https://ukhas.net/wiki/lib/tpl/dokuwiki/images/favicon.ico text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/api?rev=1593298921&do=diff The UKHASnet API is exposed as a set of HTTP URLs behind ukhas.net/api/. Program The API daemon is written in Node.js and is run as a background daemon, at ukhas.net/api/ The source code can be found on github.com/UKHASnet-hub/general-api-daemon URLs For uploading packets see here. * /upload - POST * Uploads given data string into the Database for processing text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/api_installation?rev=1593298921&do=diff This is for admin reference only, the API isn't intended for local installation, and indeed won't function with database credentials! WIP... development. Setup sudo apt-get install libpq-dev pip install virtualenv Now set up the virtualenv - Reference mkdir api-env text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/arduino_stripboard_windows_programming?rev=1593298921&do=diff Programming Arduino Nodes using Windows Having just completed setting-up some nodes using the Arduino stripboard design, I thought it might be helpful to jot down some notes and gotchas. Equipment needed: Ideally you need an AVRISP mkII programmer connected to a ZIF socket. I use an Olimex AVR-ISP mkII (abt £20) along with a Sparkfun AVR ISP Shield (£14) as this provides a ZIF socket, ISP connector and the Olimex can be set to power the chip. If you want a cheaper option, it's easy to make you… text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/building_a_ukhasnet_node?rev=1593298921&do=diff [An example sensor node, reporting Temperature and Battery Voltage] To build a UKHASnet node, the key components are the Radio Transceiver to communicate with the rest of the network, and the Microcontroller that handles the packet generation and repeating. You may also want to attach as sensor, such as temperature, humidity, voltage, or GPS position. text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/database?rev=1593298921&do=diff The database behind ukhas.net is a PostgreSQL Database. NB: Details of the tables will be provided here with diagrams however the layout is being worked upon. Proposed changes When making changes please comment as to what you've changed Node Timestamps text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/esp8266_firmware_update?rev=1593298921&do=diff ESP8266 - Upgrading the Firmware Before using the ESP8266 module, the firmware needs to be updated to provide wider router support. The instructions shown below are based on my experiences whilst upgrading my ESP8266 modules to firmware version 0.9.2.2 text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/hackwkend?rev=1593298921&do=diff Hack Weekend 2015 Aim * A weekend where the UKHASnet community come together to push forward the development of the network - the aim is to have a particular focus to work towards. The most popular projects appear to be where we create a link between two places using self-sufficient repeater nodes. text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/ircbot?rev=1593298921&do=diff Introduction We now have a basic IRC bot (Latobius) for the #ukhasnet channel. At present it doesn't do much (apart from logging channel activity) but the aim is to make it do useful stuff (querying node information and providing interactive updates for interesting nodes e.g. Balloons and Sea Bouys). text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/jcoxon_lpc810_nodes?rev=1593298921&do=diff LPC810 Nodes AF * LPC810 DIP8 Microprocessor * RFM69HW Radio * MCP1700 Voltage Reg * Attached to Solar cell, Max1555 (Sparkfun LiPo Charger) and 2000mAh Lipo AH0 * Prototype using new UKHASnet 0.1 LPC810 PCB setup * LPC810 * RFM69HW text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/mike_richards_nodes?rev=1593298921&do=diff Mike Richards G4WNC - Here's a list of my nodes: WNC0 - Arduino stripboard gateway connected to Raspberry Pi running Phil's python upload script WNC1 - Arduino stripboard sensor node using a DS18B22 and powered by 3 x AA cells WNC2 - Moteino sensor node with a DS18B22 and powered by a Turnigy nano-tech 600mAh LiPo (£1.98 from HobbyKing) text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/mitigating_interference?rev=1593298921&do=diff Background I found that my LPC810 nodes seemed to have poor receive performance and in fact they would fail to receive any packets for significant periods of time. The issue seemed to be cleared for a while after the node had transmitted. I also found the same problem with an AVR breadboard implementation. I was a little surprised that others didn't seem to suffer from the same issue. text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/mqtt_broker_roadmap?rev=1593298921&do=diff Topics WIP examples Node by callsign * /node/PS00/temperature * /node/PS04/voltage * /node/PS04/message * /node/PS04/gateway * /node/PS04/path node by type * /node/balloon/EMF1/location gateway by callsign * /gateway/P00/message text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/network_structure?rev=1593298921&do=diff The UKHASnet Network Structure is similar to the APRS system used by Amateur Radio. In that there is no collision detection, no retransmission, and no Error Correction. ... (WIP) Important Notes: * All packets are unreliable, like UDP on Computer Networks. A collision with another transmitted packet, or a burst of interference at the wrong moment may cause your packet to be lost in the network as if it never existed. text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/node_implementations?rev=1593298921&do=diff List of Node Implementations James Coxon * Arduino Boards * Arduino Nodes * AA - gateway - Lavenham, Suffolk * AB - gateway - Sevenoaks, Kent * BALL1 - Prototype balloon payload * AH0 - Stripboard Arduino + BMP180 Pressure Sensor * AH2 - Gutternode Prototype text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/node_implementations_mike_richards?rev=1593298921&do=diff Mike Richards text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/node_placement?rev=1593298921&do=diff Node Placement Indoors Garden * Sheds * Bird feeder * Trees * Fences * Solar Lanterns Roof * Chimney stack * Gutter text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/oddstr13?rev=1593298921&do=diff Links * UKHASnet nodes * Photo gallery * Jenkins * Bitbucket * Bitbucket - OpenShell * GitHub ICs to have a look at MFN MFP Description Datasheet Bosch BME280 Sensor: Temperature, Humidity & Barometric pressure [PDF] Microchip MCP73831 USB (5V) Lithium charger, fix.V, adj.I (0.5A), Vin<7V [PDF] Consonance CN3082 Linear MPPT Lithium charger adj.V, adj.I (0.6A), Vin<6.5V text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/packet?rev=1593298921&do=diff This page has moved to github. text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/packet_data_types?rev=1593298921&do=diff This page has moved to github. text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/packet_format?rev=1593298921&do=diff This page has moved to github. text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/parsers?rev=1593298921&do=diff There are currently two parsers used within the ukhas.net ecosystem. * original perl based parser that takes uploaded packets and stores data in postgres, this parsed data is available on ukhas.net node pages, via the api and irc bot. * newer Rust parser, used for the text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/phil_crump?rev=1593298921&do=diff I live in Southampton, studied Electronic Engineering at Southampton University, and continue to be involved with the Wireless Society and Spaceflight Society. On IRC I am known as craag or variations thereof. My Website: philcrump.co.uk My Github: github.com/philcrump I work as an engineer at Telemetricor Ltd. Project Involvement text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/phil_crump_avr_sensor_v2?rev=1593298921&do=diff New PCB text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/phil_crump_buoys?rev=1593298921&do=diff Planned Sea Buoys Prototype 1 * 1x Atmega328 (??) * 1x RFM69HW (??) * 1x uBlox Pico Breakout (£23.99) * 1x DS18B20 Temperature Sensor (??) * 1x 3.3V LDO? (low quiescent required) * 1x Asda 400ml Beaker (£1) * 10x Asda Long Life AA Batteries (£3) text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/phil_crump_gen1_nodes?rev=1593298921&do=diff Prototyping * MCU: Freescale KL25z - ARM Cortex M0+ Dev Board * Programmed with the mbed compiler * Radio: HopeRF RFM22B Gateway Node [Gateway Node with Pi ] Live Telemetry: Node 'P0' The gateway node is piggy-backed onto a Raspberry Pi to provide the upload of packets to the API. A DS18B20 temperature sensor is also attached to provide a temperature reading of the room. text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/phil_crump_gen2_nodes?rev=1593298921&do=diff Phils AVR-based Nodes (Generation 2) Code Repository - github.com/philcrump/UKHASnet_nodes I've built the Synchronous RFM69HW Library for the Arduino framework that I use with the Nodes. Prototyping Following James' Simple Stripboard Design for the London Hackspace Workshop, I began to use this as a base for the AVR-based nodes. Repeater Nodes text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/projects?rev=1593298921&do=diff List of Projects and Tasks people are working on or would like. Things people are playing with * Nodes * Arduino * Raspberry Pi * lpc810 * Infrastructure * Website - craag * Web API - craag * Parser Script - mfa298 * IRC Bot - mfa298 * text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/protocol_details?rev=1593298921&do=diff UKHASnet Layer 1 & 2 protocol details The protocol description can now be found on GitHub. The sound of a UKHASnet packet followed by it being forwarded - on a wideband FM radio text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/radio_hardware?rev=1593298921&do=diff Radio Transceivers 868MHz For now UKHASnet is based in the 868 MHz band, specifically in the 25KHz channel on 869.5 MHz. This is due to the 100mW License-Exempt RF output permissible both terrestrial and airborne at a 10% duty cycle (per device) in the UK. text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/rfm69hw_configuration?rev=1593298921&do=diff Phil's RFC DataModul [0x02]: 0b00000000 (Packet, FSK, No shaping) Bitrate [0x03/0x04]: 0x3E80 (2.000 kb/s) Deviation [0x05/0x06]: 0x0031 (4.9 kHz) Frequency [0x07/0x08/0x09]: 0xd98012 (869.5 MHz) RxBw [0x19]: 0b00110101 (8% DCC, 10.5kHz Channel Filter) text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/solar_charging_ics?rev=1593298921&do=diff An attempt at a brief summary of solar charging ICs for single-cell lithium batteries. Solar panels provide the most power if you limit the current drawn from them, so a proper solar charger will do MPPT (Maximum Power Point Tracking). In reality, most cheap solar charger ICs imitate this by restricting the current drawn to keep the panel voltage constant (generally around 4.5V). text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/start?rev=1593298921&do=diff Welcome to the UKHASnet Wiki UKHASnet is a simple mesh network protocol, using cheap license-free modules, and simple re-broadcast routing. This has been developed by several members of UKHAS (UK High Altitude Society). The mesh network is intended as a low-cost, low-effort sensor network for the home, hackerspace or campus. But we are also hoping to achieve links through nodes deployed on High Altitude Balloons and Sea Buoys. text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/submitting_your_packets_towards_the_ukhasnet_site?rev=1593298921&do=diff If you want to use the public UKHASnet map/database to graphically display raw packets, you should use the API. A quick hack would be modifying UKHASnetIgate. This little script takes raw packets coming over the serial connection and uploads it using the API. Please keep in mind this script is very rough, and might break without any reason. To prevent submitting everything to the text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/synchronous_rfm69hw_lib?rev=1593298921&do=diff RFM69HW Synchronous Library This is a synchronous control and configuration library for the RFM69HW (currently only Arduino-compatible). Code Repository - github.com/philcrump/UKHASnet_RFM69_Synchronous By synchronous, this means that the library will block on transmission, and requires polling to read whether a packet is waiting in the FIFO buffer, failure to check this regularly will cause the previously received packet to be discarded if another is received. text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/todo?rev=1593298921&do=diff RF * Write up some tested antenna design guides (1/4 wave, moxon, etc) * Test Phil's RFC for radio configuration. * Build FSK decoder in gnuradio for testing * Test performance against the RFM69 receiver ukhas.net * Add RSSI Upload * Database: Add RSSI column to upload table (default: 0) text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/ukhas_conference_2014?rev=1593298921&do=diff Infrastructure Each node will consist of a Pi, RFM69 Module, and possibly an AVR depending on the state of the Pi-SPI Comms Stack. * 3x Passive Gateway Nodes * 1x Active IRC Gateway Node Pi Networking * Eduroam limits number of devices per credentials text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/uploading_packets?rev=1593298921&do=diff Uploading packets to the ukhas.net system is done by: HTTP POST to <http://www.ukhas.net/api/upload> HTTP Parameters Compulsory * origin: Callsign of gateway node (string) * data: Raw packet as received (string) Optional * rssi: Received rssi of the packet (signed integer in dBmW)