mruijter / lora_transceiver Goto Github PK

Hi mruijter,
I tried to send out regularly, using "while true; do echo "hello lora" >/dev/shm/send_fifo; sleep 1; done"
on the receiver side arduino dragino shield is used. but seems after a while it stop sending, until the lora.service is restarted, but then it stops again after a while (approx. 10x sending),
my config is: SF7, BW125, blocksize 3 (tried also 32), CR4_8, CRC=enabled., on the Arduino side, is configured the identical.

How could I debug this ? where to look for this kind of problem?
Thank You, Regards.

Hi,

I have an Arduino MKR 1300 which sends weather data (see this code) via lora.
If i use my RaspberryPi with the Dragino hat with the original dragino code the RaspberryPi receives nearly every message. If i use your code, I only receive a few messages -> over 80 % loss. The distance between the RaspberryPi and the Arduino is 1m. The frequency, spreading factor, bandwith, coding rate and crc settings are the same on both. Do you have an idea what could be the problem?

Greetings

Hi, I have tried this code in sx1276 and it worked in sf7 868.1mhz bw125khz
but I tried to change sf to 12 and then I can`t receive any signal.
config.txt is the same as yours.
Or I should change it in REG_MODEM_CONFIG2?

The lora_transreceiver was working for over a year now on my RaspberryPi 3B. I bought a Raspberry Pi 4 and would like to upgrade to it. Unfortunatelly the lora_transceiver isn't working on the Raspberry Pi 4.

I printed out the version which is used to detect if it's a sx1272/76 (lora_transceiver.c, line 290). The version which is printed out is 00

Log output:

Verbose level: 2
Selected bandwidth: BW125
Selected spreading factor: SF8
CRC checks: enabled
Selected coding rate: CR4_5
Debugging: enabled
Send / receive packets at: SF8 on 868.300000 Mhz.
Fifo /dev/shm/receive_fifo is now open
Fifo /dev/shm/send_fifo is now open
Unrecognized transceiver.

@mruijter Do you have an idea what could be wrong here? If i put it back on the RaspberryPi 3B it's working

it works great and helped me a lot , I have problem how to alternate between Tx and Rx, if Rx fifo is receiving, and then Tx Fifo is written, it freezes, I haven't fully grasp how the whole thing working. thank you.

Hello,

I am running RaspberryPi OS 64 Bit and wanted to establish a connection between 2 LoRa hats. I am using 64 Bit because I am running a backend with mongodb and want to use more than 2GB. With 32bit I am limited to 2GB of DB storage. After running make i got this:

g++ -I ./include lora_transceiver.c lib_log.c lib_str.c lib_cfg.c -lwiringPi -o lora_transceiver
/usr/bin/ld: skipping incompatible /usr/lib/gcc/aarch64-linux-gnu/8/../../../../lib/libwiringPi.so when searching for -lwiringPi
/usr/bin/ld: skipping incompatible /lib/../lib/libwiringPi.so when searching for -lwiringPi
/usr/bin/ld: skipping incompatible /usr/lib/../lib/libwiringPi.so when searching for -lwiringPi
/usr/bin/ld: skipping incompatible /usr/lib/gcc/aarch64-linux-gnu/8/../../../libwiringPi.so when searching for -lwiringPi

Note: I first installed lwiringpi over apt-get but make failed completely and I then installed a 64 Bit version of it.

While running make install I then got this:

install -m 755 lora_transceiver /usr/bin
install -m 644 lora.service /lib/systemd/system
install -D -b -m 644 lora.conf-example /etc/lora/lora.conf
systemctl daemon-reload
systemctl restart lora
systemctl status lora
● lora.service - Starts the lora transceiver.
Loaded: loaded (/lib/systemd/system/lora.service; disabled; vendor preset: enabled)
Active: activating (auto-restart) (Result: exit-code) since Wed 2021-06-23 12:37:42 CEST; 20ms ago
Process: 12983 ExecStart=/usr/bin/lora_transceiver (code=exited, status=1/FAILURE)
Main PID: 12983 (code=exited, status=1/FAILURE)
make: *** [Makefile:20: install] Error 3