boards.txt.py: add Wemos ESP-WROOM-02 board

* add fixes from #6551 (comment)
* add flashfreq_26 to the macro list

tools/boards.txt.py

@@ -621,6 +621,21 @@
         'serial': '921',
         'desc': [ 'Product page: https://www.wemos.cc/' ],
     }),
+    ( 'd1_wroom_02', {
+        'name': 'LOLIN(WEMOS) D1 ESP-WROOM-02',
+        'opts': {
+            '.build.board': 'ESP8266_WEMOS_D1WROOM02',
+            '.build.variant': 'd1_mini',
+            },
+        'macro': [
+            'resetmethod_nodemcu',
+            'flashmode_dio',
+            'flashfreq_26',
+            '2M',
+            ],
+        'serial': '921',
+        'desc': [ 'No real product pages. See: https://www.instructables.com/How-to-Use-Wemos-ESP-Wroom-02-D1-Mini-WiFi-Module-/ or https://www.arduino-tech.com/wemos-esp-wroom-02-mainboard-d1-mini-wifi-module-esp826618650-battery/ ' ],
+    }),
     ( 'd1_mini_clone', {
         'name': 'LOLIN(WEMOS) D1 mini (clone)',
         'opts': {
@@ -1085,6 +1100,10 @@
         ( '.menu.FlashFreq.26.build.flash_freq', '26' ),
         ]),
 
+    'flashfreq_26': collections.OrderedDict([
+        ( '.build.flash_freq', '26' ),
+        ]),
+
     'flashfreq_40': collections.OrderedDict([
         ( '.build.flash_freq', '40' ),
         ]),