Added country to AIS app, so you know from which country a vessel is.

It's using the MID database, which is also part of the PR.
mids.db should be placed in /AIS folder on SD card.

firmware/tools/make_mids_db/make_mid_db.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+
+# Copyright (C) 2022 ArjanOnwezen
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+# -------------------------------------------------------------------------------------
+# Create mids.db, used for AIS receiver application, using converted Excel file on page:
+# https://www.itu.int/en/ITU-R/terrestrial/fmd/Pages/mid.aspx
+# as a source.
+# MID stands for Marine Identification Digits and can be used to determine conutry of
+# vessel or coastal station.
+# -------------------------------------------------------------------------------------
+import csv
+import re
+import unicodedata
+mid_codes=bytearray()
+countries=bytearray()
+row_count=0
+
+database=open("mids.db", "wb")
+
+with open('MaritimeIdentificationDigits.csv', 'rt') as csv_file:
+        sorted_lines=sorted(csv_file.readlines())
+
+        for row in csv.reader(sorted_lines, quotechar='"', delimiter=',', quoting=csv.QUOTE_ALL, skipinitialspace=True):
+                mid_code=row[0]
+                # Normalize some unicode characters
+#unicodedata.normalize('NFKD', row[3][:32]).encode('ascii', 'ignore') 
+                country=unicodedata.normalize('NFKD', "".join(re.split("\(|\)|\[|\]", row[1].split('-')[-1].replace(" of Great Britain and Northern Ireland" , ""))[::2])).replace("Democratic People's Republic of Korea", "North-Korea").strip().encode('ascii', 'ignore')[:32]
+                if len(mid_code) == 3 :
+                        country_padding=bytearray()
+                        print(mid_code,' - ', country)
+                        mid_codes=mid_codes+bytearray(mid_code+'\0', encoding='ascii')
+                        country_padding=bytearray('\0' * (32 - len(country)), encoding='ascii')
+                        countries=countries+country+country_padding
+                        row_count+=1
+
+database.write(mid_codes+countries)
+print("Total of", row_count, "MID codes stored in database")
+