Script for BLUETTI modbus discovery-log parsing to ReadHoldingRegisters parameters

range_finder.py

import json
import sys

def find_available_ranges(filename):
    available_addresses = []

    with open(filename, 'r') as file:
        for i, line in enumerate(file):
            log_entry = json.loads(line)
            # Check if the "error" field exists and if it contains "MODBUS Exception"
            if "error" not in log_entry or "MODBUS Exception" not in log_entry["error"]:
                available_addresses.append(i + 0)  # Adjust starting index as per example

    # Finding continuous ranges
    ranges = []
    if available_addresses:
        start = available_addresses[0]
        end = available_addresses[0]
        for address in available_addresses[1:]:
            if address == end + 1:
                end = address
            else:
                ranges.append((start, end))
                start = address
                end = address
        ranges.append((start, end))

    return ranges

def main():
    if len(sys.argv) != 2:
        print("Usage: python range_finder.py <filename>")
        sys.exit(1)

    filename = sys.argv[1]
    ranges = find_available_ranges(filename)
    print("Available ranges of starting addresses:")
    for start, end in ranges:
        if start == end:
            print("{}".format(start))
        else:
            print("{} - {}".format(start, end))

if __name__ == "__main__":
    main()