[Ovmsdev] Firmware size approaching 4 MB limit
Michael Balzer
dexter at expeedo.de
Sun Dec 7 15:57:52 HKT 2025
FYI: use `make size-components` to create a report on all component
sizes (`make size-files` for source file level).
Unsurprisingly the webserver is on top, even with all assets
precompressed already.
*_Top 10 components:_*
Per-archive contributions to ELF file:
Archive File DRAM .data & .bss IRAM Flash code & rodata
Total
libovms_webserver.a 0 255 0 134342 399846
534443
libstdc++.a 149 5640 0 141045 72513 219347
libmain.a 15 2104 0 139216 40086 181421
libduktape.a 0 0 0 141641 20367 162008
libvehicle_renaulttwizy. 0 29 0 86517 75357 161903
libc-psram-workaround.a 1854 66 18391 118283 10943 149537
liblwip.a 17 3873 0 118366 16722 138978
libnet80211.a 938 9042 10475 92339 21900 134694
libmbedtls.a 100 560 76 107079 26785 134600
libvehicle_vweup.a 8 8 0 60846 43432 104294
*_Vehicles:_*
Per-archive contributions to ELF file:
Archive File DRAM .data & .bss IRAM Flash code & rodata
Total
libvehicle_renaulttwizy. 0 29 0 86517 75357 161903
libvehicle_vweup.a 8 8 0 60846 43432 104294
libvehicle_mgev.a 156 26 0 47756 33998 81936
libvehicle_smarteq.a 82 15 0 59267 19527 78891
libvehicle_smarted.a 0 9 0 48481 28801 77291
libvehicle_renaultzoe_ph 4 10 0 44622 29564 74200
libvehicle.a 0 68 0 57735 12062 69865
libvehicle_bmwi3.a 0 2 0 33370 14357 47729
libvehicle_minise.a 9432 2 0 35360 2210 47004
libvehicle_hyundai_ioniq 176 7 0 32921 13425 46529
libvehicle_nissanleaf.a 0 3 0 35491 8941 44435
libvehicle_kiasoulev.a 240 9 0 32508 5473 38230
libvehicle_kianiroev.a 108 7 0 24070 4006 28191
libvehicle_mitsubishi.a 0 5 0 21645 3893 25543
libvehicle_boltev.a 0 5 0 15999 7864 23868
libvehicle_niu_gtevo.a 4 12 0 18248 3733 21997
libvehicle_maxus_edelive 156 3 0 10713 7477 18349
libvehicle_renaultzoe.a 0 6 0 14828 2859 17693
libvehicle_maxus_euniq56 156 3 0 8363 6840 15362
libvehicle_voltampera.a 0 5 0 13221 1932 15158
libvehicle_hyundai_ioniq 0 3 0 11081 3191 14275
libvehicle_teslaroadster 0 6 0 10367 2238 12611
libvehicle_thinkcity.a 0 3 0 6114 3449 9566
libvehicle_jaguaripace.a 0 8 0 5445 3941 9394
libvehicle_fiatedoblo.a 0 2 0 4262 2126 6390
libvehicle_teslamodels.a 0 2 0 5361 948 6311
libvehicle_toyotarav4ev. 0 2 0 5023 1255 6280
libvehicle_maxus_t90.a 0 3 0 2567 2204 4774
libvehicle_byd_atto3.a 0 2 0 3503 947 4452
libvehicle_energica.a 0 1 0 3319 880 4200
libvehicle_demo.a 0 2 0 3205 795 4002
libvehicle_maxus_euniq6. 0 2 0 2470 1182 3654
libvehicle_fiat500.a 0 2 0 2838 732 3572
libvehicle_zombie_vcu.a 0 4 0 1882 1259 3145
libvehicle_mercedesb250e 0 2 0 2113 955 3070
libvehicle_zeva.a 0 2 0 2209 688 2899
libvehicle_dbc.a 0 2 0 1278 1395 2675
libvehicle_cadillac_c2_c 0 7 0 1293 1105 2405
libvehicle_maple60s.a 0 2 0 1416 698 2116
libvehicle_chevrolet_c6_ 0 2 0 1053 1049 2104
libvehicle_obdii.a 0 2 0 957 1007 1966
libvehicle_teslamodel3.a 0 2 0 458 713 1173
libvehicle_none.a 0 2 0 418 684 1104
libvehicle_track.a 0 2 0 416 680 1098
Regards,
Michael
Am 06.12.25 um 10:33 schrieb Michael Balzer via OvmsDev:
> Everyone,
>
> with the latest vehicle additions, the firmware size has now grown to
> 4,015,328 bytes in build 3.3.005-485-gc4664881.
>
> Our flash partitioning scheme is currently designed to provide three
> firmware partitions (factory, ota_0 & ota_1) of 4MB = 4,194,304 bytes
> each.
>
> So we've now got 178,976 bytes = ~4% left.
>
> Options beyond the 4 MB limit:
>
> a) split features, e.g. vehicle support, into two or more builds
>
> b) repartition into two firmware partitions of 6 MB each, reusing the
> factory partition for OTA
>
> c) switch to an ESP32 WROOM module with 32 MB flash (possible?)
>
> We've got some time left, new vehicles normally don't need that much
> space, I just wanted to raise awareness.
>
> Regards,
> Michael
>
>
> _______________________________________________
> OvmsDev mailing list
> OvmsDev at lists.openvehicles.com
> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
--
Michael Balzer * Am Rahmen 5 * D-58313 Herdecke
Fon 02330 9104094 * Handy 0176 20698926
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