This project is a collection of former (and some new) projects connected together to make an APRS digipeater, which doubles as an APRS weather station, with PE1RXF telemetry server capabilities.
This project is a collection of former (and some new) projects brought together to make an APRS digipeater, which doubles as an APRS weather station, with PE1RXF telemetry server capabilities.
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![Block diagram of digipeater](./images/block_diagram_overview.svg "Block diagram ofdigipeater")
@ -47,7 +47,7 @@ Although stand alone in operation, to read the measurements the weather station
## Peripherals
The Raspberry Pi need some extra hardware for interfacing the various peripherals, like the transceiver, the ModBus and the Rnode modem.
The Raspberry Pi needs some extra hardware for interfacing the various peripherals, like the transceiver, the ModBus and the Rnode modem.
### USB hub
@ -75,11 +75,13 @@ For the low speed network link I use the Rnode project from [https://unsigned.io
The hardware on which the Rnode firmware is flashed is a LilyGO LoRa32 v2.1 (also known as TTGO T3 v1.6.1). Of course you need at least two boards to form a network. With a good antenna, the range is easily 100 meters (and probably more than 1 km), which is plenty enough for what I need.
The Raspberry Pi with all the extra hardware is housed in a small plastic housing. On the back panel behind the SMA connectors and the power jack, I placed a copper strip. This acts as the start grounding strip on which all other ground wires are connected. This prevents a lot of RF and EMC problems.
The Raspberry Pi with all the extra hardware is housed in a small plastic housing. On the back panel behind the SMA connectors and the power jack, I placed a copper strip. This acts as the star grounding strip on which all other ground wires are connected. This prevents a lot of RF and EMC problems.
![Inside the brains](./images/raspberry_pi_proto_small.jpg "Inside the brains")
@ -124,7 +126,7 @@ The instalation of all the needed software on the Raspberry Pi is complicated, s