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Check-list

  • Does the WaveShare Hat start automatically when the Raspbery Pi start? Led "STA" needs to be ON (and not just "PWR"). If this is not the case after about 1 minute, run the shell commands:
sudo systemctl enable pigpiod
sudo systemctl start pigpiod
  • Is the Raspberry Pi configured in UTC? Run the shell command timedatectl to check. If not, run the shell commands:
sudo timedatectl set-timezone UTC
  • Do you get the SMS message drifterXY ready, switching GNSS on ? If not, check with the shell commands:
journalctl -u drifter-diy.service
  • Reply to the drifter with the SMS message status (all lower case, no space at the end). Do you get an answer?

Debugging

Raspberry Pi does not connect to WiFi

  • Conect the Raspberry PI with an ethernet cable to router
  • Get the IP address from the router and SSH into the Raspberry Pi
  • Run sudo nmtui and select Activate a connection, select WiFi and enter password
  • More information is available at https://pimylifeup.com/setting-up-raspberry-pi-wifi/

Other issues

The SD cart can be mounted in a Linux system and the log files can be inspected.

Log files are available under, e.g.:

/var/log/journal/cea2410f2a2549828d4c623c99ee548f $ journalctl --file user-1000.journal --utc

/var/log/

Entering PUK

AT+CPIN="PUK","new_PIN"

For example AT+CPIN="12341234","1234" where the new pin can be the same as the old pin.

Decoding SMS messages

using GSMHat, TOML
confname ="drifter-diy.toml"
config = open(confname) do f
               TOML.parse(f)
           end
sp = GSMHat.init(config["portname"], config["baudrate"]; pin=config["pin"],
                local_SMS_service_center=config["local_SMS_service_center"])
messages = GSMHat.get_messages(sp)

decodemsg(str) = join(Char.(parse.(Int,[str[(4*i) .+ (1:4)] for i = 0:(length(str)÷4-1)],base=16)))
decodemsg(messages[1].sms_message_body)
# output
# "Cher client Proximus, votre carte prépayée numéro...

SSH connection without keys

ssh -o PubkeyAuthentication=no -o PreferredAuthentications=password  -A pi@192.168.0.199

Query credit

AT
OK
AT+CUDS=?
ERROR
AT+CUSD=?
+CUSD: (0-2)

OK
AT+CUSD?
+CUSD: 0

# OK
AT+CSCS="GSM"
# OK
AT+CUSD=1,"#121#",15
# OK
# 
# +CUSD: 0, "Krediet: 8.94 EUR Geldigheid: 19/03/2026. Extra min., sms, MB: druk #120# en verzenden.", 15