oe7drt-website/content/posts/2023-08-27-dmrhost-on-a-raspberrypi4-with-freebsd/index.md

+++
title = 'DMRHost on a Raspberry Pi 4 with FreeBSD'
summary = '''multiline commentary
    olay'''
date = '2023-08-26T21:01:16+02:00'
#lastmod = ''
categories = [ 'amateur-radio' ]
tags = []

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# showDate = false
# showReadingTime = false
# showWordCount = false
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draft = true

+++

## Setup FreeBSD

I'm using 14.0-CURRENT for this.

<https://download.freebsd.org/ftp/snapshots/arm64/aarch64/ISO-IMAGES/14.0/>

```console
$ doas dd if=FreeBSD-14.0-ALPHA3-arm64-aarch64-RPI-20230825-2af9390e54ed-265022.img of=/dev/rsd2c bs=1m
```

Boot into the system with the serial console. Setup a dedicated user for this and
disable the serial console after you successfully set up the network (don't forget
to also test ssh connection).

```console
$ doas pw useradd mmdvm -d /home/mmdvm -m -L daemon -G dialer
```

Do not use the UART for kernel messages.
Add this line to your `/boot/loader.conf` file.

```conf
hw.fdt.console="NO"
```

Reboot so the serial console can be used for the MMDVM_HS hat.

## Install DMRHost

You will need a few packages before we can continue. This list could
be incomplete because I try to remember them from brain memory...

```console
$ doas pkg install git gcc cmake
```

Goto `/home/mmdvm`, build and install DMRHost.

```console
$ doas -u mmdvm mkdir ~/git && cd /home/mmdvm/git
$ doas -u mmdvm git clone https://github.com/BrandMeister/DMRHost.git
$ cd DMRHost && doas -u mmdvm mkdir build && cd build
$ doas -u mmdvm (cmake -DCMAKE_BUILD_TYPE=Release .. && make)
$ doas make install
```

Create directories and the `MMDVM.ini` file.

```console
$ cd /home/mmdvm && doas -u mmdvm mkdir logs && chmod 0775 logs
$ doas -u mmdvm nvim MMDVM.ini
```

```ini
[...]

[Log]
# Logging levels, 0=No logging, 1=Debug, 2=Message, 3=Info, 4=Warning, 5=Error, 6=Fatal
SyslogLevel=0
DisplayLevel=0
FileLevel=2
FilePath=/home/mmdvm/logs
FileRoot=DMRHost
FileRotate=0

[...]

[Modem]
Port=/dev/cua00
Protocol=uart

[...]
```

I also add my user to the mmdvm group, so I can edit the MMDVM file.
(Well, set file permissions to 0664)

```console
$ doas pw usermod <user> -G mmdvm
```

## Test DMRHost

```console
$ doas -u mmdvm /usr/local/bin/DMRHost /home/mmdvm/MMDVM.ini

```

You may inspect the logfile beforehand: `tail -f /home/mmdvm/logs/DMRHost.log`.
The startup of DMRHost should end with something like these lines:

```log
M: 2023-08-25 11:03:05.000 DMRHost-20220617-DMRHost is running
M: 2023-08-25 11:03:15.000 DMR, Logged into the master successfully
```

## Setup an rc file

```sh
#!/bin/sh
# rc-script for DMRHost on OpenBSD 7.3
# runs on FreeBSD for now
# Dominic Reich <https://oe7drt.com>

DMRHOST="/usr/local/bin/DMRHost"
MMDVM_INI="/home/mmdvm/MMDVM.ini"
DMRHOST_PID="/home/mmdvm/DMRHost.pid"
DOAS="/usr/local/bin/doas -u mmdvm"
LOGDIR="/home/mmdvm/logs"

case "$1" in
  "start")
    if [ ! -d ${LOGDIR} ] ; then
      mkdir ${LOGDIR}
      chown mmdvm:users ${LOGDIR}
      chmod 0775 ${LOGDIR}
    fi
    if ${DOAS} [ ! -r ${MMDVM_INI} ] ; then
      echo "${MMDVM_INI} is not readable... aborting!"
      exit 1
    fi
    echo -n "Starting DMRHost..."
    ${DOAS} ${DMRHOST} ${MMDVM_INI} &
    echo $! | ${DOAS} tee ${DMRHOST_PID} > /dev/null
    echo " done"
  ;;

  "stop")
    echo -n "Stopping DMRHost..."
    if [ -f ${DMRHOST_PID} ] ; then
      kill `cat ${DMRHOST_PID}`
      rm -f ${DMRHOST_PID}
      echo " done"
    else
      echo "not running?"
    fi
  ;;

  "restart")
    $0 stop
    sleep 2
    $0 start
  ;;

  *)
    echo "$0 [start|stop|restart]"
  ;;

esac
```