richonguzman
LILYGO ® Ttgo loRa32 v2.1_1.6 - VHF 144 188 MHz
I bought this board - https://pt.aliexpress.com/item/32872078587.html?spm=a2g0o.order_list.order_list_main.5.7d86caa4XmCNJ2&gatewayAdapt=glo2bra, the VHF 144-148 version with the SX1278 for this project since I'm located in Portugal. In Europe APRS is broadcasted on 144.800Mhz
The software upload to the board with no problem but, after the board gets configured, I cannot receive any packets (and they are being broadcasted to my area since I can listen to them on another radio with onluy a rubber duck antenna, while the board is connected to a VX50.
I do not see any reference to this version of the board here at github and I'm kind of wondering if it is compatible with this software.
Any advice?
The Packet radio running in Europe (and also worldwide) on 144.800 VHF is not compatible with LoRa transmissions. The Lora Packet radio network running in Europe is located on 433.775 Mhz
I bought this board - https://pt.aliexpress.com/item/32872078587.html?spm=a2g0o.order_list.order_list_main.5.7d86caa4XmCNJ2&gatewayAdapt=glo2bra, the VHF 144-148 version with the SX1278 for this project since I'm located in Portugal. In Europe APRS is broadcasted on 144.800Mhz
The software upload to the board with no problem but, after the board gets configured, I cannot receive any packets (and they are being broadcasted to my area since I can listen to them on another radio with onluy a rubber duck antenna, while the board is connected to a VX50.
I do not see any reference to this version of the board here at github and I'm kind of wondering if it is compatible with this software.
Any advice?
hi
LoRa APRS is not the same as VHF APRS.... even if they work in the same QRG (Freq). The way both work makes no posible direct communications between them
so VHF APRS with VHF APRS and LoRa with LoRa.
the only way to connect them is by bridging them with respective iGates and after the APRS-IS step.
There are at least two ways to bridge between regular APRS and LoRa APRS without IGate or APRS-IS.
https://raw.githubusercontent.com/wb2osz/direwolf-doc/main/APRS-LoRa-VHF-APRS-Bridge.pdf
73, John WB2OSZ
Yes, tested and it is easy: https://www.grupporadiofirenze.net/2025/03/03/bridge-tra-lora-aprs-433mhz-e-digipeater-aprs-144mhz/
I bought this board - https://pt.aliexpress.com/item/32872078587.html?spm=a2g0o.order_list.order_list_main.5.7d86caa4XmCNJ2&gatewayAdapt=glo2bra, the VHF 144-148 version with the SX1278 for this project since I'm located in Portugal. In Europe APRS is broadcasted on 144.800Mhz
It would be cool if the Semtech chip had an AFSK modem, which is what 2 m APRS uses. Audio signal impressed on an FM voice radio carrier. However, Semtech does not support AFSK, but instead FSK. The two are incompatible with one another.
It is possible to make a pseudo-AFSK decoder with the Semtech chip, but takes a fair amount of work and is currently a hack. I can't find the hack I'd just read about, but here are a number of links about the difference between FSK and AFSK
https://electronics.stackexchange.com/questions/426206/understanding-afsk-and-fsk
https://www.nadars.org.uk/afskvsfsk.asp
