This page will guide you through the installation of the software required to run the device. Details on the physical mounting of the device can be found on the manufacturer’s website.
You might also find the official documentation for the SIM8200EA-M2 5G HAT helpful.
Prerrequisites
- The device must be physically assembled.
- A SIM card must be installed. SIM cards with PIN codes are currently not supported, though support may be added in the future. The SIM must provide network access.
- The device must have Ubuntu installed. You can follow the official Ubuntu documentation to complete this step.
- You must have root console access to the device, either physically or via SSH.
Connecting to the Network
First, install the required packages:
sudo apt update
sudo apt install libqmi-utils udhcpcThen, establish the connection. You may want to create a shell script to connect to the network on startup:
#!/bin/sh
/usr/bin/qmi-network /dev/cdc-wdm0 start
/usr/bin/ip link set wwan0 up
/usr/sbin/udhcpc -q -f -n -i wwan0If you need to set the APN, do so in /etc/qmi-network.conf. For example, for Movistar in Spain:
APN=telefonica.esInstalling the control software
The control software is a Python application that connects to the HAT via serial interface and to the MQTT server via the Raspberry Pi’s network connection (whether through the HAT modem, Ethernet port, or Wi-Fi antenna).
Upon establishing a connection with the HAT, the software issues two AT commands:
AT+CGPSINFO=1to start receiving geopositioning data.AT+CPSI=1to start receiving network quality and connectivity data.
The HAT will then send geopositioning and network quality data every second. For each valid network data message, the control software sends a geo-tagged message to the MQTT server.
Messages received from the HAT
DEBUG:hat:< +CGPSINFO: XXX.XXXXXX,N,XXX.XXXXXX,W,220725,170219.0,654.9,0.0,0.0
DEBUG:hat:< +CPSI: LTE,Online,214-07,0x6FB9,73795850,13,EUTRAN-BAND3,1301,5,5,-192,-773,-374,3Message sent to the MQTT server
DEBUG:mqtt:signal/EUTRAN-BAND3>XXX.XXXXXX,N,XXX.XXXXXX,W,220725,170219.0,654.9,0.0,0.0,LTE,Online,214-07,0x6FB9,73795850,13,EUTRAN-BAND3,1301,5,5,-192,-773,-374,3If no geopositioning data is available, the message is discarded.
In some cases, the HAT may report signal quality for multiple bands. When this occurs, the software will send multiple messages to the MQTT server, each containing the same position and timestamp but for different bands.
The control software is distributed as a Snap package. You can download the latest Snap package from the Releases section on GitHub.
If you need to run a modified version of the software, install Snapcraft and build your own package:
Building a custom snap package
sudo apt update
sudo apt install snapcraft git
git clone https://github.com/aferre88/5gdrone.git
cd 5gdrone
# Make the necessary changes
snapcraft
A .snap file will be created in the directory. This is the package you’ll need to install instead of the downloaded one.
wget https://github.com/aferre88/5gdrone/releases/download/2024.10.1/5gdrone_2024.10.1_arm64.snap
sudo snap install ./5gdrone_2024.10.1_arm64.snap --dangerous # Pointing to the correct MQTT server
sudo snap set 5gdrone mqtt.host=mqtt.uc3m.es
sudo snap set 5gdrone mqtt.port=8883
sudo snap set 5gdrone mqtt.user=username
sudo snap set 5gdrone mqtt.pass=passwordThen restart the service:
sudo snap restart 5gdroneTroubleshooting
Setting the log level to debug
sudo snap set 5gdrone loglevel=DEBUG
sudo snap restart 5gdroneFollow the logs
sudo journalctl -u snap.5gdrone.5gdrone.service -f
