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  • Any ideas?

    When examining the 1.99 and 2.04 zip packages via nrfutil command I see one difference - the fw_version. For older 1.99 _app package fw is set to value 7, see below. v2.04 has it set to fw_version: 0x000000FF (255). Maybe it could make difference, maybe not. Otherwise it looks same for both. Required softdevice version is the same 0x8c= S132 3.0.0

    $ nrfutil pkg display espruino_1v99_thingy52_app.zip
    
    DFU Package: <espruino_1v99_thingy52_app.zip>:
    |
    |- Image count: 1
    |
    |- Image #0:
       |- Type: application
       |- Image file: espruino_1v98_thingy52_app.bin
       |- Init packet file: espruino_1v98_thingy52_app.dat
          |
          |- op_code: INIT
          |- signature_type: ECDSA_P256_SHA256
          |- signature (little-endian): 7f0399ea98381d2422df261c10376236d888f52c­73bf370a2066c4b1d410f1dd72fff6fab493a091­c0cd2fe57892c1c86965c35e382a8ce4d0584cb6­1c2095ca
          |
          |- fw_version: 0x00000007 (7)
          |- hw_version 0x00000034 (52)
          |- sd_req: 0x8C
          |- type: APPLICATION
          |- sd_size: 0
          |- bl_size: 0
          |- app_size: 253952
          |
          |- hash_type: SHA256
          |- hash (little-endian): fbb0f7848bdf4184e0254c56040636871fdc1216­bd6184bb1ed18bfc7faba244
          |
          |- boot_validation_type: []
          |- boot_validation_signature (little-endian): []
          |
          |- is_debug: False
    
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