Exception (29) after OTA update request via mqtt on nodemcu using stock firmwares

Describe the bug Exception (29) storeprohibitedcause after OTA update request via mqtt on nodemcu using stock firmwares

To Reproduce

Publish to


mosquitto_pub -u omg --pw xxxxx -t "home/OMG_ESP8266_IR/commands/MQTTtoSYS/firmware_update" -m '{
"version": "test",
"password": "yyyyy",
"url": "https://github.com/1technophile/OpenMQTTGateway/releases/download/v1.6.0/nodemcuv2-rf-firmware.bin"
}'

2. See error
<details>

  <summary>Serial console log</summary>

---------- 8< ---------- snip ---------- >8 ---------- N: [ MQTT->OMG ]: {"version":"test","password":"yyyyy","url":"https://github.com/1technophile/OpenMQTTGateway/releases/download/v1.6.0/nodemcuv2-rf-firmware.bin"} W: Starting firmware update N: Send on /RLStoMQTT msg {"release_summary":"Update in progress ..."} N: using config cert

       --------------- CUT HERE FOR EXCEPTION DECODER ---------------

Exception (29): epc1=0x4000df64 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000000 depc=0x00000000

stack>>>

ctx: sys sp: 3fffec10 end: 3fffffb0 offset: 0190 3fffeda0: 00000016 3ffef730 00000020 40100f00
3fffedb0: 000000d4 3ffef730 000000d4 4010116e
3fffedc0: 4027105b 3ffef730 00000002 40270ff0
3fffedd0: 00000002 40270f97 00000002 402700ec
3fffede0: 40270115 3fffee90 3ffef730 00000016
3fffedf0: 4026db74 3fffee90 3ffef5d8 3ffeefa0
3fffee00: 3ffece2c 3fffee90 3fffee90 40100b7e
3fffee10: 336f5f4f 3fff1500 00000000 3fff37c4
3fffee20: 00000000 00000020 3fff37c4 40100ecc
3fffee30: 40269ecd 3fff5ccc 3fff37c4 402490a4
3fffee40: ffffffc6 3ffef0ec 3ffece3c 3ffef730
3fffee50: 3ffee680 00000026 00000000 4026e86f
3fffee60: 00000000 3fff16b4 ffffffc6 00000000
3fffee70: 00000000 3ffef730 00000000 0000000f
3fffee80: 3fff127c 3fff1008 af3840c1 3fff12c4
3fffee90: 00000000 10110606 00640104 00000043
3fffeea0: 3ffece50 000000ac 3ffece63 3ffece44
3fffeeb0: 00000000 3ffece50 3ffece56 3ffece85
3fffeec0: 00000000 00000000 3ffece6f 3ffecedb
3fffeed0: 3ffece92 3ffeceae 00000000 00000000
3fffeee0: 00000000 00000000 00000026 00000000
3fffeef0: 3fff195c 4026e2de 3ffee680 3fff16b4
3fffef00: 00000000 3ffef730 3ffee680 3ffece2c
3fffef10: 3ffece2c 000000d4 00000000 00000026
3fffef20: 00000000 3ffece36 402819ff 3ffee680
3fffef30: 3ffece20 3fffdcc0 3ffeaca0 3ffeaca0
3fffef40: 00000080 3ffee680 00000000 3fffdab0
3fffef50: 402812c3 3fffdab0 00000000 4022ad9a
3fffef60: 3ffeaca0 40000f49 3fffdab0 40000f49
3fffef70: 40000e19 0009f4a8 bff00000 0000bfff
3fffef80: 00000005 aa55aa55 0000001e 40105941
3fffef90: 40105947 bff00000 0000bfff 3ffea41a
3fffefa0: 4010000d bff00000 0009f4a8 401000ab
3fffefb0: 402761ec 3fffef4c 4027619d 3fff4990
3fffefc0: 00000005 00000000 00000020 401003b8
3fffefd0: feefeffe feefeffe 00000005 401025a8
3fffefe0: 3ffeac45 4010583f 3ffee6d0 feefeffe
3fffeff0: 40103133 3ffee6d0 feefeffe feefeffe
3ffff000: 00007fff 22ee5361 3ffeefa0 40103310
3ffff010: 3ffeb4f0 00000000 00000000 feefeffe
3ffff020: 00007fff 22ee5361 401037ca 00000100
3ffff030: 3ffeb4f0 7fffffff 00002200 00000001
3ffff040: 00000001 00004288 feefeffe feefeffe
3ffff050: 3ffeb4f0 feefeffe feefeffe 22ee5361
3ffff060: 3ffeb4fc 2c9f0300 4000050c 3fffc278
3ffff070: 401034ec 3fffc200 00000022 feefeffe
3ffff080: 402559c6 00000030 00000016 ffffffff
3ffff090: 4025569c cdbe24ad 478e0521 1d8544c4
3ffff0a0: 64eca971 01a72256 952e2c9d 4fa692f5
3ffff0b0: 3ffff200 1da604d5 a5b4a9ab 654b8b27
3ffff0c0: 30f37a76 1cf5e586 4c808e3d 00000030
3ffff0d0: feefeffe feefeffe feefeffe feefeffe
3ffff0e0: feefeffe feefeffe feefeffe feefeffe
3ffff0f0: 33d32af1 b015accd 679c397b 6acc4341
3ffff100: 809c8646 e72fd292 6964fc2b 49277ce9
3ffff110: 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c
3ffff120: 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c
3ffff130: 1c342cc4 a6872295 f75260cb f8dd6fdb
3ffff140: 26c950b9 c2a96f40 4c90519d a3f8a12b
3ffff150: c9f5cee3 3c6b3cf6 57fdd112 213494b0
3ffff160: 15e88e35 25d72bb6 fb527415 1786b9a6
3ffff170: c48e83ce 9b9d3150 9d537804 7025a905
3ffff180: e1c655e8 47267c85 affa362a 0760881d
3ffff190: e8573bbf 88e084f7 83fe8af8 a0dd7d85
3ffff1a0: 932f7b30 90c549c8 3643ec04 33c2dcea
3ffff1b0: d70ed086 1a125a1a 5f3d0ad6 c21f6d79
3ffff1c0: 59d122f7 4ed32787 fcdf6198 a221f5b4
3ffff1d0: ff9eae5d 6983408e cbd3cbf8 4e82cea7
3ffff1e0: 80000000 00000000 00000000 00000000
3ffff1f0: 00000000 00000000 00000000 00000300
3ffff200: 28773402 46b7954e 79d80465 e9dcd38c
3ffff210: c4000923 7724cb8b c63cf963 00000080
3ffff220: 03030000 010000ce c7e1929d 0000c43c
3ffff230: a3935bf6 79b53cb4 25586342 f8a1fc7c
3ffff240: b9d90000 747789b3 a8c02bc0 5acca9cc
3ffff250: 30c0acc0 2fc02cc0 afc023c0 adc0aec0
3ffff260: 28c009c0 27c024c0 14c02dc0 13c00ac0
3ffff270: 32c025c0 31c02ec0 2ac004c0 29c026c0
3ffff280: 0f009c00 0ec005c0 9dc0a0c0 9dc09cc0
3ffff290: 3d002f00 a1003c00 12c003c0 35c008c0
3ffff2a0: 2df198d2 412663b2 1e21ecca aac074b8
3ffff2b0: d0647f09 1dfc4bea 5c60cc64 ab3b4fc9
3ffff2c0: fa522a14 6035b556 ed803ded 165741f4
3ffff2d0: 9963c945 42063c77 895473bb 77ce54ea
3ffff2e0: 64348343 04663205 68779c96 3c499ebc
3ffff2f0: d6b49924 64de3a04 ee6e3645 a2983315
3ffff300: 6d856cff 68a37bcf 7896392f 01ad43ac
3ffff310: 4e908497 dcb393e4 14a98451 f6bfde9c
3ffff320: f55eb936 128c282b 7ae61efe 1e250533
3ffff330: 34cd4ab3 34031ce4 0a8b1dae 6b28ce59
3ffff340: 3404e81d d192e00e b9e4e3d1 132f06ec
3ffff350: ee35a8ad 4c18855f d9866350 50e8d986
3ffff360: ee5c673d 7fcd2e9f cfcc50c1 d17ea03a
3ffff370: 52cf1606 d924a9fa 4b4246e0 c2bc2d09
3ffff380: da39bde3 5427df20 6d05ed17 243966fc
3ffff390: 7fc13335 70b2a997 3efb9d8b 52f7c4a9
3ffff3a0: a4eba1f2 776cde09 afa34d7d 05ebca8a
3ffff3b0: 88793b0d 606d7644 1c1907f0 faf2d063
3ffff3c0: 0963df88 73fae579 8782d9d0 843d72ab
3ffff3d0: 086f5356 fd7f6dd6 11ec918c c37de7de
3ffff3e0: bd981842 b0ea19d0 cbaf6224 28b8a086
3ffff3f0: 1a71b978 dacc7e51 b35e307b 29c9fe16
3ffff400: ac20bedc 3ffe22c9 7bd448af 38690a78
3ffff410: 79d8c8c2 3f92f4c8 e32ebd09 17cdc9c7
3ffff420: ea747188 8593020d 137acc99 07deb176
3ffff430: 6b4bf544 b76d4071 6d996005 53d4424e
3ffff440: fc7ebc52 07160f1a 5cbf6309 a17687d2
3ffff450: a049d5c1 f16f0d6e a7df5573 4a05ed51
3ffff460: 190082e0 9af44e57 7ae18813 afd8611b
3ffff470: 08310a19 e3d51688 f385d55b 421d3cd9
3ffff480: 00000002 00000000 40282417 00000000
3ffff490: ffffffff 00000000 3ffead91 00000000
3ffff4a0: 40282466 3ffee388 3fff16b4 00000001
3ffff4b0: 00000002 00000000 00000020 401003b8
3ffff4c0: 00000005 00000005 00000002 401025a8
3ffff4d0: 3ffeac42 40281527 3ffee388 3fffbd4c
3ffff4e0: 00000000 4026aaf7 3ffef730 3fff16b4
3ffff4f0: 00000000 00000002 00000000 3ffee388
3ffff500: 3fffbd82 40105e83 3fff3ec8 3fff0ff0
3ffff510: 3fff195c 00000000 00000020 401003b8
3ffff520: 00000005 4024813d 3fff3ec8 3fff0ff0
3ffff530: 401034ec 3fffc200 00000022 3fffbae4
3ffff540: 40249077 00000030 00000010 3fff1008
3ffff550: 3fff1008 3fffbd4c 3fffbd4c 4024836b
3ffff560: 3fff1040 3fffbd4c 00000000 402487ca
3ffff570: 3fff138c 3fffbd34 00000005 401025a8
3ffff580: 00000005 00000000 00000020 401003b8
3ffff590: 3fff1008 3fff1040 00000005 401025a8
3ffff5a0: 3ffeac45 4010583f 3ffee680 40103310
3ffff5b0: 40103133 3ffee680 00000000 401025a8
3ffff5c0: 00007fff 22f28dc5 3ffeefa0 40103310
3ffff5d0: 3ffeb4e4 00000000 00000000 4024fe18
3ffff5e0: 00007fff 22f28dc5 401037ca 00000100
3ffff5f0: 3ffeb4e4 7fffffff 00002200 00000001
3ffff600: 00000001 00004a88 4000050c 3fffc278
3ffff610: 3ffeb4e4 00000000 0000001f 22f28dc5
3ffff620: 3ffeb4f0 2c9f0300 4000050c 3fffc278
3ffff630: 401034ec 3fffc200 00000022 401003b8
3ffff640: 402579d4 00000030 00000010 ffffffff
3ffff650: 4020e71a 3fff5d9c 00000003 00000001
3ffff660: 00004bc6 00000000 00000000 fffffffe
3ffff670: 00000000 3fffc6fc 00000000 00000000
3ffff680: 0000202e 00003a98 00000000 00000030
3ffff690: 00000000 3fffc6fc 00000000 3fff3834
3ffff6a0: 00000644 00003a98 00000000 00000030
3ffff6b0: 00000010 00000860 3ffe88a8 00000000
3ffff6c0: 3fffbd4c 00000001 3fff5ccc 4024d234
3ffff6d0: 3fff356c 3fff5ccc 3fff5ccc 4024d31b
3ffff6e0: 00000001 00000000 00000000 402490a4
3ffff6f0: 3fff1008 3fffbae4 3fff37c4 402495ba
3ffff700: 00000000 00000000 3fff356c 00000000
3ffff710: 3fff356c 000001f2 3fff5ccc 00000000
3ffff720: 3fff356c 00000200 00000200 4020d4c4
3ffff730: 3fff6cf9 0008f252 dd70a3d7 0a582fd0
3ffff740: 00000000 00000000 4022aeb6 00000000
3ffff750: 00003a98 00000000 00000000 4020e7d6
3ffff760: 00000200 3fff679c 3fff5d9c 40257388
3ffff770: 00000008 00000001 0008f15e 00000000
3ffff780: 3fff629c 402584e0 3fff5d9c 00000000
3ffff790: 3fff629c 3ffff914 3fff5d9c 3ffff914
3ffff7a0: 00000000 00000001 3fff3834 4020e82b
3ffff7b0: 00000000 00000001 3fff3834 4020ea17
3ffff7c0: 00000000 0008f106 b810624d 0a56afc4
3ffff7d0: 00000000 00000000 00000034 0008f106
3ffff7e0: 00003a98 3fff356c 3fff3834 4020d702
3ffff7f0: 3fff5ccc 000003fe 3ffe88a8 00000000
3ffff800: 3ffff8c0 00000020 00000020 3ffea739
3ffff810: 000001bb 3ffff914 3fff3834 4020eab9
3ffff820: 4023e148 0379528c 4023e148 0379528c
3ffff830: 3fff3cf0 00000000 3ffff910 4023a3dd
3ffff840: 3ffe9a9b 00000000 3ffff910 4023ac78
3ffff850: 3ffff8c0 3ffff910 3ffff940 4023a1fd
3ffff860: 00000000 00000020 3ffff8c0 4022983a
3ffff870: 00002770 00000005 3fff3cf0 40229911
3ffff880: 00000000 3ffff8d8 00000001 00000000
3ffff890: 00000000 00000020 0000001c 4022ac77
3ffff8a0: 3fff087c 3ffff8d8 00000000 3ffffc1c
3ffff8b0: 3fff0994 3ffff910 3fff0974 40226f1d
3ffff8c0: 00000000 00006863 00000000 00000000
3ffff8d0: 000e000f 00000000 3ffea268 00000000
3ffff8e0: 00000000 3fff19ac 3ffff958 40229a78
3ffff8f0: 402900e8 00000000 3ffff910 3fff3834
3ffff900: 3fff1ab4 3ffffc1c 3fff0974 40227159
3ffff910: 3fff353c 68746967 632e6275 0a006d6f
3ffff920: 3f0001bb 00011f40 3fff5b1c 0050005f
3ffff930: 80000000 70747468 00000073 05000000
3ffff940: 3fff5b84 013e013f 80000000 00000000
3ffff950: 3fff1ab4 00000000 3fff1b64 0013001f
3ffff960: 80000000 3fff3cf0 00000001 00000000
3ffff970: ffffffff 00000000 00000001 4020000a
3ffff980: 00000000 00000000 00000000 00000000
3ffff990: 00000000 00000062 3ffffc10 402298cf
3ffff9a0: 3ffffbe8 3ffffc10 3ffffc1c 40229911
3ffff9b0: 3fff1ab4 3fff0864 3ffffbc0 40209e0f
3ffff9c0: 3ffff9e8 3ffff9e8 3ffffbd8 3ffffbe8
3ffff9d0: 40282500 3ffee3d8 3ffffbd8 3ffffbd8
3ffff9e0: 00000020 3fff35ac 00000008 3fff35c8
3ffff9f0: 402814dc 3ffee3d8 3ffeeb50 3fff35ac
3ffffa00: 00000000 4026aaf7 3ffef730 3fff16b4
3ffffa10: 00000000 00000002 00000000 3ffee3d8
3ffffa20: 3fff35e2 40105e83 3fff3ee4 3fff0ff0
3ffffa30: 3fff195c 00000000 00000800 3ffe83c4
3ffffa40: 00002020 4024813d 3fff3ee4 3fff0ff0
3ffffa50: 00000006 00000000 0000000a 000003e3
3ffffa60: 3fff3494 00000021 3ffe88a8 3fff1008
3ffffa70: 00001fa0 000003f4 3ffe88a8 40100b7e
3ffffa80: 3fff1040 3fff35ac 00000000 000003e3
3ffffa90: 3fff3494 00000011 3ffe88a8 40101132
3ffffaa0: 00000020 00000020 00000064 00000095
3ffffab0: 00000006 00000000 00000088 3fff3494
3ffffac0: 00001fc0 000003f8 3ffe88a8 40100b7e
3ffffad0: 0000007c 00000080 3ffffe98 000003e3
3ffffae0: 3fff3494 00000015 3ffe88a8 40101132
3ffffaf0: 00000020 00000020 00000084 00000095
3ffffb00: 0000007c 00000001 00000084 3fff3494
3ffffb10: 3ffeac40 00000001 3ffffe98 00000014
3ffffb20: 00000090 000000a0 3ffffe98 4022983a
3ffffb30: 0000007c 22a2c884 3ffeefa0 00000000
3ffffb40: 3fff1b05 00000076 3ffffbb0 00000014
3ffffb50: 00000090 00000001 3ffffe98 402298cf
3ffffb60: 00000000 00000001 3ffffe98 40229c26
3ffffb70: 3fff3494 3ffffbb4 3ffffbb0 40205316
3ffffb80: 3ffffc30 3ffffe68 3ffffbb0 3fff1a94
3ffffb90: 3fff2898 00000000 3ffffc2c 40201568
3ffffba0: 4000050c 00000000 3fffff04 40205aa2
3ffffbb0: 3ffffe98 722d3276 69662d66 61776d72
3ffffbc0: 622e6572 7d226e69 2f302e00 4022cf6c
3ffffbd0: 3fff3524 fffffffc 3ffe9c56 3ffffe98
3ffffbe0: 00007c04 3ffe9c46 4023dcb8 00000000
3ffffbf0: 00002ee0 40292496 00000000 3fff209c
3ffffc00: 00000000 3fff3834 3fff3834 3fff390c
3ffffc10: 3fff3714 0062006f 80000000 00000000
3ffffc20: 00000004 00000000 00000000 40201cb8
3ffffc30: 00000000 3ffff9d8 3ffff9c0 40204a7a
3ffffc40: 3ffe8c15 3ffff9c0 00000018 3fff1a94
3ffffc50: 3fff2898 00000000 3fffff04 3fff1a94
3ffffc60: 3fff2898 00000000 3ffffe70 4020a076
3ffffc70: 3ffffc98 3ffffc98 3ffffe68 3ffffe98
3ffffc80: 3fff1600 3fff3ee4 3ffffe88 3ffffe68
3ffffc90: 3ffffd20 3ffffca0 3fffff2c 40207eb4
3ffffca0: 3ffffcc8 3ffffd03 3ffffdd8 3ffffec8
3ffffcb0: 00000000 00000000 3ffffeb8 3ffffde8
3ffffcc0: 40101c20 00000030 33383831 3fff0be0
3ffffcd0: 3fffdad0 00000000 3fff0bb4 4020717c
3ffffce0: 00000001 00000000 00000014 401003b8
3ffffcf0: 40282466 3ffee3d8 00000001 402800ef
3ffffd00: 4028254a 3ffee3d8 401026e7 3ffee3d8
3ffffd10: 00000014 3fff3494 00000008 3fff34b0
3ffffd20: 402814dc 3ffee3d8 3ffeeb50 3fff3494
3ffffd30: 000005e0 00000000 40104645 3ffeedc0
3ffffd40: 00000000 00000000 00000020 401003b8
3ffffd50: 00000005 00000000 00000000 401025a8
3ffffd60: 3ffeac40 40105827 3ffee4f0 401003b8
3ffffd70: 00000001 40104a02 3ffeedc0 401003b8
3ffffd80: 40104e73 22de286e 3ffeefa0 40103310
3ffffd90: 00000005 00000000 00000020 401003b8
3ffffda0: 4010493b 00000021 00000005 401025a8
3ffffdb0: 3ffeac45 4010583f 3ffee6d0 00000001
3ffffdc0: 40103133 3ffee6d0 00000000 40103310
3ffffdd0: 00007fff 22dfc3aa 3ffeefa0 40103310
3ffffde0: 3ffeb4c0 00000000 00000000 3fffc278
3ffffdf0: 00007fff 22dfc3aa 401037ca 00000100
3ffffe00: 3ffeb4c0 7fffffff 00000000 00000001
3ffffe10: 00000001 00004288 00418937 000022df
3ffffe20: 3ffeb4c0 00318a1c 00000000 22dfc3aa
3ffffe30: 3ffeb4cc 2c9f0300 4000050c 3fffc278
3ffffe40: 401034ec 3fffc200 00000022 00000030
3ffffe50: 4020a642 00000030 00000010 ffffffff
3ffffe60: 00001f18 000003e3 3fff1ab4 40100b7e
3ffffe70: 00004b04 3fff1ab0 3fff1aaa 00000001
3ffffe80: ffff3404 3fff1aa1 3fff1a9c 40100ecc
3ffffe90: ffff0004 3fff1a94 3fff3494 0090009f
3ffffea0: 80000000 3fff1b31 0000007d 3ffffc70
3ffffeb0: 00000000 00000000 3fff3cb4 4020d419
3ffffec0: 00000000 0008ed84 5fbe76c8 00000001
3ffffed0: 0008ed84 3fff209c 0000007d 4020d512
3ffffee0: 000000d8 3fffff12 3fff04c8 4020a208
3ffffef0: 00000000 00000000 00000000 00000000
3fffff00: 00000000 3ffffc88 3ffffc70 3fff28d2
3fffff10: 00000001 0000009d 00000020 3fff28d2
3fffff20: 3fff1a94 3fff1b31 3fff2898 4020a116
3fffff30: 3fff1490 3fff04c8 3fff04c8 00000002
3fffff40: 00000001 0008ed82 3fff04c8 4020a7d0
3fffff50: 0000009d 3fff28d2 3fff2898 40100b7e
3fffff60: 3fff1490 00000000 3fff3d02 00000001
3fffff70: 00000004 00000039 000000db 00000005
3fffff80: 3fffdad0 3fff1490 0008ed82 3fff0be0
3fffff90: 3fff055c 00000000 0008ed82 40207f48
3fffffa0: 3fffdad0 00000000 3fff0bb4 3fff0be0
<<<stack<<<

--------------- CUT HERE FOR EXCEPTION DECODER ---------------

ets Jan 8 2013,rst cause:2, boot mode:(3,6)

load 0x4010f000, len 3424, room 16 tail 0 chksum 0x2e load 0x3fff20b8, len 40, room 8 tail 0 chksum 0x2b csum 0x2b v0009f4b0 ~ld N: * WELCOME TO OpenMQTTGateway ** N: OpenMQTTGateway Version: v1.6.0 { "mqtt_server": "192.168.1.222", "mqtt_port": "1883", "mqtt_user": "omg", "mqtt_pass": "xxxxx", "mqtt_topic": "home/", "gateway_name": "OMG_ESP8266_IR", "mqtt_broker_secure": false, "mqtt_broker_cert": "", "mqtt_ss_index": 0, "ota_server_cert": "", "ota_pass": "yyyyy" }wm:[2] Added Parameter: server wm:[2] Added Parameter: port wm:[2] Added Parameter: user wm:[2] Added Parameter: pass wm:[2] Added Parameter: secure wm:[2] Added Parameter: cert wm:[2] Added Parameter: name wm:[2] Added Parameter: topic *wm:[2] Added Parameter: ota N: Attempting Wifi connection with saved AP: 0 N: IR_EMITTER_GPIO: 16 N: IR_RECEIVER_GPIO: 2 N: OpenMQTTGateway modules: ["IR"] N: ** Setup OpenMQTTGateway end ** W: MQTT connection... N: Connected to broker N: Send on /SYStoMQTT msg {"uptime":2,"version":"v1.6.0","discovery":true,"ohdiscovery":false,"env":"nodemcuv2-ir","freemem":32808,"mqttport":"1883","mqttsecure":false,"rssi":-64,"SSID":"TEST","BSSID":"xx:xx:xx:xx:xx:xx","ip":"192.168.1.111","mac":"yy:yy:yy:yy:yy:yy","modules":["IR"]} ---------- 8< ---------- snip ---------- >8 ----------

</details>

**Expected behavior**
Not crashing and successfully [updating](https://docs.openmqttgateway.com/use/gateway.html#firmware-update-from-mqtt-esp-only) using the default root certificate since this board with 4MB should have enough memory to store the downloaded OTA update.

**Environment (please complete the following information):**
* OpenMQTTGateway version used (v1.6.0)

**Additional context**
From: [nodemcuv2-ir-firmware.bin](https://github.com/1technophile/OpenMQTTGateway/releases/download/v1.6.0/nodemcuv2-ir-firmware.bin)
To target: [nodemcuv2-rf-firmware.bin](https://github.com/1technophile/OpenMQTTGateway/releases/download/v1.6.0/nodemcuv2-rf-firmware.bin)

Board: wemos.cc LoL1n new NodeMcu V3

$ esptool.py -p /dev/ttyUSB0 flash_id esptool.py v3.1 Serial port /dev/ttyUSB0 Connecting.... Detecting chip type... ESP8266 Chip is ESP8266EX Features: WiFi Crystal is 26MHz MAC: yy:yy:yy:yy:yy:yy Uploading stub... Running stub... Stub running... Manufacturer: 20 Device: 4016 Detected flash size: 4MB Hard resetting via RTS pin...

1technophile / OpenMQTTGateway

Exception (29) after OTA update request via mqtt on nodemcu using stock firmwares #1760