diff --git a/scripts/generate_csv_and_headers.sh b/scripts/generate_csv_and_headers.sh
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+++ b/scripts/generate_csv_and_headers.sh
@@ -0,0 +1,64 @@
+#!/bin/sh
+
+# Builds the dump_*.csv files, modbus headers and modbus documentation.
+# Run as `sh scripts/generate_csv_and_headers.sh` from the root of the repository.
+
+##
+## IMPORTANT NOTE!
+##  This script is not used anymore. It is kept for reference only. 
+##  It has been replaced with two pio targets: build_modbus and build_standalone.
+##
+
+# create a dummy modbus_entity_parameters.hpp so the first pass compiles
+cat >./src/core/modbus_entity_parameters.hpp <<EOL
+#include "modbus.h"
+#include "emsdevice.h"
+
+/*
+ * This file is auto-generated. Do not modify.
+*/
+
+// clang-format off
+
+namespace emsesp {
+
+using dt = EMSdevice::DeviceType;
+
+#define REGISTER_MAPPING(device_type, device_value_tag_type, long_name, modbus_register_offset, modbus_register_count) \\
+    { device_type, device_value_tag_type, long_name[0], modbus_register_offset, modbus_register_count }
+
+// IMPORTANT: This list MUST be ordered by keys "device_type", "device_value_tag_type" and "modbus_register_offset" in this order.
+const std::initializer_list<Modbus::EntityModbusInfo> Modbus::modbus_register_mappings = {};
+
+} // namespace emsesp
+
+// clang-format on
+
+EOL
+
+# First generate Modbus entity parameters
+# build the modbus_entity_parameters.hpp header file
+make clean
+make -s ARGS=-DEMSESP_MODBUS
+rm -f ./src/core/modbus_entity_parameters.hpp ./docs/dump_entities.csv
+echo "test entity_dump" | ./emsesp | python3 ./scripts/strip_csv.py > ./docs/dump_entities.csv
+cat ./docs/dump_entities.csv | python3 ./scripts/update_modbus_registers.py > ./src/core/modbus_entity_parameters.hpp
+
+# regenerate dump_entities.csv but without the Modbus entity parameters
+make clean
+make -s ARGS=-DEMSESP_STANDALONE
+rm -f ./docs/dump_entities.csv
+echo "test entity_dump" | ./emsesp | python3 ./scripts/strip_csv.py > ./docs/dump_entities.csv
+
+# generate Modbus doc - Modbus-Entity-Registers.md used in the emsesp.org documentation
+rm -f ./docs/Modbus-Entity-Registers.md
+cat ./docs/dump_entities.csv | python3 ./scripts/generate-modbus-register-doc.py > ./docs/Modbus-Entity-Registers.md
+
+# dump_telegrams.csv
+rm -f ./docs/dump_telegrams.csv
+echo "test telegram_dump" | ./emsesp | python3 ./scripts/strip_csv.py > ./docs/dump_telegrams.csv
+
+ls -al ./src/core/modbus_entity_parameters.hpp
+ls -al ./docs/Modbus-Entity-Registers.md
+ls -al ./docs/dump_entities.csv
+ls -al ./docs/dump_telegrams.csv
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