Senec Home V2.1 1ph / Lithium json request

senec_home_v2_1_li_data_request.sh

#!/bin/bash
#
# Copyright (C) 2022 Nikolas Koesling <nikolas@koesling.info>.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
# documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
# Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
# OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
#
# This script requests the following data from a senec battery of the type "Senec Home V2.1 1ph / Lithium" as json:
#    - Mains frequency                     (PM1OBJ1 -> FREQ)
#    - Mains voltage (3 phase)             (PM1OBJ1 -> U_AC)
#    - Mains current (3 phase)             (PM1OBJ1 -> I_AC)
#    - Mains total power                   (PM1OBJ1 -> P_TOTAL)
#    - Battery charge                      (ENERGY  -> GUI_BAT_DATA_FUEL_CHARGE)
#    - Battery power                       (ENERGY  -> GUI_BAT_DATA_POWER)
#    - Battery voltage                     (ENERGY  -> GUI_BAT_DATA_VOLTAGE)
#    - Solar inverter power                (ENERGY  -> GUI_INVERTER_POWER)
#    - Building electricity consumption    (ENERGY  -> GUI_HOUSE_POW)
#    - Battery energy                      (ENERGY  -> GUI_BAT_DATA_OA_CHARGING)

#check if command line argument exists
if [ ! $# -eq 1 ];
then
    >&2 echo "invalid arguments!"
    echo "usage: $0 IP"
    echo "    IP: IP address of the senec battery"
    exit 1
fi

IP="$1"

curl https://$IP/lala.cgi --insecure -s -H 'Content-Type: application/json' -d '{"PM1OBJ1":{"FREQ":"","U_AC":"","I_AC":"","P_TOTAL":""},"ENERGY":{"GUI_BAT_DATA_FUEL_CHARGE":"","GUI_BAT_DATA_POWER":"","GUI_BAT_DATA_VOLTAGE":"","GUI_INVERTER_POWER":"","GUI_HOUSE_POW":"","GUI_BAT_DATA_OA_CHARGING":""}}'

Hello
i knew it was a float number, i didn't know how to convert it from c language.
I solved it like this:
long lo = strtol(hexstring, NULL, 16);
float fl = *(float *)&lo; // cast the address of the long as a float pointer and dereference.
Thanks again for your quick response
a greeting