why messaging logs ERROR

[fow0ryl]

Some weeks ago I added messaging to my EVCC installation.

Because there is no native implementation for signal messanger I have build a server to act as messagebot in my local network.
The task here is to create a json message an send it to the messagebot server.

In EVCC I have added "custom" messaging to /etc/evcc.yaml

messaging:
  events:
    start:
      msg: "{{.vehicleTitle}} Ladevorgang gestartet. Modus={{ toString .mode | upper }} / SOC KFZ={{.vehicleSoc}}% / SOC Akku={{.batterySoc}}%"
    stop: 
      msg: "{{.vehicleTitle}} Ladevorgang beendet. {{round (divf .chargedEnergy 1000) 2 }} kWh in {{.chargeDuration}} geladen. SOC KFZ={{.vehicleSoc}}% / SOC Akku={{.batterySoc}}%"
  services:
    - type: custom
      encoding: json
      send:
        # Plugin Typ
        source: script
        # Plugin-spezifische Konfiguration.
        # {{.send}} enthält die JSON Nachricht
        cmd: /usr/local/bin/sendSignalMsg.sh "\"{{.send}}\""

I placed a simple script "sendSignalMsg.sh" in /usr/local/bin. The script is taking the input from EVCC, is adding some stuff to create the message. The message is posted via wget to the MessageBot Server.
During first tests I found that there are error message in log file about certificate trust errors. Finally I added the certificate of my local root-ca to EVCC and the certificate error was history ...

/usr/local/bin/sendSignalMsg.sh

#!/bin/bash

# Alle uebergebenen Parameter (sie koennten durch ' ' getrennt sein) zu einem String zusammenfassen,
# {} entfernen, und "msg;" entfernen
# Den bereinigten String in der Variablem MSG speichern
MSG=$( echo ${*} | cut -d'}' -f1 | cut -d'{' -f2 | cut -d':' -f2)

# Erstelle eine temporaere Datei und speichere den Namen in der Variablen TEMP_FILE
TEMP_FILE=$(mktemp)

# Nachricht im JSON Format erstellen
echo '{' > ${TEMP_FILE}
echo '  "receiver": "+49nnnnnnnnnn",' >> ${TEMP_FILE}
echo '  "msg": "'${MSG}'"' >> ${TEMP_FILE}
echo '}' >> ${TEMP_FILE}

wget --post-file=${TEMP_FILE} --header=Authorization:"Basic cBlaBla" --header=Content-Type:application/json -qO- https://Messagebot:8080/evcc/justsend.sh >/dev/null 2>&1

# temporaere Datei wieder loeschen
rm -rf ${TEMP_FILE}

# Jetzt noch mal fuer 2. Empfaenger wiederholen
# ===========================================

# Erstelle eine temporaere Datei und speichere den Namen in der Variablen TEMP_FILE
TEMP_FILE=$(mktemp)

# Nachricht im JSON Format erstellen
echo '{' > ${TEMP_FILE}
echo '  "receiver": "+49xxxxxxxxxx",' >> ${TEMP_FILE}
echo '  "msg": "'${MSG}'"' >> ${TEMP_FILE}
echo '}' >> ${TEMP_FILE}

wget --post-file=${TEMP_FILE} --header=Authorization:"Basic cBlaBla" --header=Content-Type:application/json -qO- https://Messagebot:8080/evcc/justsend.sh >/dev/null 2>&1

# temporaere Datei wieder loeschen
rm -rf ${TEMP_FILE}

exit 0

But there are more ERROR messages in log, and I don't know where its coming from :(

[script] ERROR 2026/02/05 12:45:05 /usr/local/bin/sendSignalMsg.sh "{msg:Twingo E-TECH Ladevorgang gestartet. Modus=NOW / SOC KFZ=48% / SOC Akku=20.900000000000002%}":
[push ] ERROR 2026/02/05 12:45:05 send: signal: killed 

When running the script via CLI there are no error messages at all ...
How to remove/supress these ERROR messages?