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APRS, understanding the telemetry

Details
Last Updated: 08 June 2025
Hits: 2316
 telemetry graphs  The APRS protocol is used to transmit telemetry data, i.e. 5 analog values and 8 binary values (1 or 0).

It's not an easy protocol to grasp for the first time.
Let's see if we can get to the bottom of it.

Read more …

iGate APRS LoRa CD2RXU

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Last Updated: 14 August 2024
Hits: 11489
 cd2rxu igate screen icons8 error 16 This page is now out of date, the new install procedure has been greatly simplified.

CA2RXU's iGate LoRa software offers a few notable improvements over other iGates :
- APRS LoRa classic gateway
- gateway + LoRa transmitter broadcasting weather information.
- digipeater APRS LoRa simplex ou duplex
- OTA (remote software update)
- mini weather station
- configuration multi-WLAN
- distinct APRS symbols depending on the gateway mode
- etc...

Read more …

TNC packet radio avec un Arduino Nano

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Last Updated: 28 August 2023
Hits: 1462

Description d'une solution pour réaliser un TNC 1200 Bauds à l'aide d'un Arduino Nano

Ayant eu besoin de recevoir les trames APRS d'un digipeater VHF, j'ai cherché une solution simple, rapide et peu coûteuse.
Voici le résultat de mes recherches et mes essais.

Ayant quelques modules Arduino en stock, j'ai recherché une solution utilisant ces modules.
J'ai trouvé plusieurs possibilités, mais toutes n'ont pas fonctionné.

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Tracker CD2RXU LoRa APRS

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Last Updated: 22 December 2024
Hits: 23909
cd2rxu tracker display 

 This article is no longer relevant. The software has evolved considerably and no longer requires programming.
This is done online via a Web interface. It does, however, provide some interesting informations.

CD2RXU's LoRa APRS Tracker software is a fork of OE5BPA's, to which he has added functionalities.
It brings several improvements over the original software, including :
- a menu offering a choice of functions
- choice of different callsigns (and icons, e.g. TK5EP-9 car, TK5EP-7 runner, etc.)
- the ability to view the reception of other Trackers
- reduced power consumption by lowering CPU speed
- compression of transmitted data to reduce transmission time, thus reducing power consumption and improving reception immunity
- local weather report request, etc...
To take advantage of certain functionalities, you also need to use his iGate software.

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APRS LoRa weather station

Details
Last Updated: 14 December 2024
Hits: 16163
TK5KP 13 zoom Description of a versatile weather station.
Features :
- Built around a TTGO T3 LoRa 433 MHz module
- Sensors for temperature, pressure, humidity, rainfall, wind speed and direction.
- Protocols: APRS via LoRa, APRS-IS, MQTT and Wunderground via WiFi.
- Wifi with DHCP or static address
- OLED display with or without screensaver.
- Password-protected OTA updates.
- Web server with all datas.
- LoRa fallback if WiFi or Internet fails
- etc...

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OE5BPA LoRa APRS

Details
Last Updated: 24 June 2023
Hits: 18120
Tracker

This article is a guide to building an APRS LoRa network using OE5BPA software.
APRS (Automatic Packet Reporting System) is a digital data transmission system created and used by radio amateurs.
Its main use is for transmitting the geographical position of stations.
Originally, digital transmission was carried out using the Packet radio protocol. But since then, many stations have been using the more recent LoRa protocol, which is more efficient in terms of range and power consumption.

In the meantime, I use CD2RXU softwares.

Read more …

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