[SOLVED] MySigning cannot write hmac key to eeprom of standalone ATmega328p (sign verify fail)
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@alexanderkind could you enable the verbose signing debug flag on the node please?
@Anticimex Yeah of course:
0 MCO:BGN:INIT NODE,CP=RNNNAS-,VER=2.1.1 32 TSM:INIT 49 TSF:WUR:MS=0 81 TSM:INIT:TSP OK 98 TSM:INIT:STATID=1 131 TSF:SID:OK,ID=1 147 TSM:FPAR 163 Will not sign message for destination 255 as it does not require it 278 TSF:MSG:SEND,1-1-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK: 2375 !TSM:FPAR:NO REPLY 2392 TSM:FPAR 2408 Will not sign message for destination 255 as it does not require it 2523 TSF:MSG:SEND,1-1-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK: 4636 !TSM:FPAR:NO REPLY 4653 TSM:FPAR 4669 Will not sign message for destination 255 as it does not require it 4800 TSF:MSG:SEND,1-1-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK: 6897 !TSM:FPAR:NO REPLY 6914 TSM:FPAR 6930 Will not sign message for destination 255 as it does not require it 7045 TSF:MSG:SEND,1-1-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK: 9158 !TSM:FPAR:FAIL 9175 TSM:FAIL:CNT=1 9191 TSM:FAIL:PDTThat's strange, isn't it? I will try it without the request from all flag on the gateway but I thought it would be right to set it if I want signing for all nodes. (At the moment I'm just experimenting with one node.)
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@alexanderkind could you enable the verbose signing debug flag on the node please?
@Anticimex Sorry. It was my fault. Now it should be correct. Here is the new debug output:
0 MCO:BGN:INIT NODE,CP=RNNNAS-,VER=2.1.1 32 TSM:INIT 49 TSF:WUR:MS=0 81 TSM:INIT:TSP OK 98 TSM:INIT:STATID=1 131 TSF:SID:OK,ID=1 147 TSM:FPAR 163 Will not sign message for destination 255 as it does not require it 278 TSF:MSG:SEND,1-1-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK: 737 TSF:MSG:READ,0-0-1,s=255,c=3,t=8,pt=1,l=1,sg=1:0 802 Skipping security for command 3 type 8 851 TSF:MSG:FPAR OK,ID=0,D=1 2375 TSM:FPAR:OK 2392 TSM:ID 2408 TSM:ID:OK 2424 TSM:UPL 2441 Skipping security for command 3 type 24 2490 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=OK:1 2572 TSF:MSG:READ,0-0-1,s=255,c=3,t=25,pt=1,l=1,sg=1:1 2637 Skipping security for command 3 type 25 2686 TSF:MSG:PONG RECV,HP=1 2719 TSM:UPL:OK 2736 TSM:READY:ID=1,PAR=0,DIS=1 2768 Signing required 2801 Skipping security for command 3 type 15 2850 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=15,pt=6,l=2,sg=0,ft=0,st=OK:0101 2932 Waiting for GW to send signing preferences... 2998 TSF:MSG:READ,0-0-1,s=255,c=3,t=15,pt=6,l=2,sg=0:0101 3063 Skipping security for command 3 type 15 3112 Mark node 0 as one that require signed messages 3162 Mark node 0 as one that do not require whitelisting 3227 Skipping security for command 3 type 16 3293 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=16,pt=0,l=0,sg=0,ft=0,st=OK: 3358 Nonce requested from 0. Waiting... 3407 TSF:MSG:READ,0-0-1,s=255,c=3,t=17,pt=6,l=25,sg=0:03AC0D8B3CB5CB15A89C1CA0D34A23A3CD126BB074F8B86363 3538 Skipping security for command 3 type 17 3588 Nonce received from 0. 3620 Proceeding with signing... Message to process: 01002E0011FF322E312E31 Current nonce: 03AC0D8B3CB5CB15A89C1CA0D34A23A3CD126BB074F8B86363AAAAAAAAAAAAAA HMAC: 42A3503DBB004E69A9D9F7D28B95840D053FC9392FA07DEEB0F7DF77FDE96F28 Signature in message: 01A3503DBB004E69A9D9F7D28B95840D053FC939 5062 Message signed 5160 Message to send has been signed 5193 TSF:MSG:SEND,1-1-0-0,s=255,c=0,t=17,pt=0,l=5,sg=1,ft=0,st=OK:2.1.1 5292 Skipping security for command 3 type 16 5341 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=16,pt=0,l=0,sg=1,ft=0,st=OK: 5423 Nonce requested from 0. Waiting... 5472 TSF:MSG:READ,0-0-1,s=255,c=3,t=17,pt=6,l=25,sg=1:4C7070935D33A92B30B5C969B2D73AD1528B7715B3DDBCE1A3 5586 Skipping security for command 3 type 17 5636 Nonce received from 0. 5668 Proceeding with signing... Message to process: 01000E2306FF00 Current nonce: 4C7070935D33A92B30B5C969B2D73AD1528B7715B3DDBCE1A3AAAAAAAAAAAAAA HMAC: CB7D06543C6086C9CCB25CF7DB42F0A81613215486A512EDA03238F8E33D3C4D Signature in message: 017D06543C6086C9CCB25CF7DB42F0A81613215486A512ED 7127 Message signed 7208 Message to send has been signed 7258 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=6,pt=1,l=1,sg=1,ft=0,st=OK:0 9338 Skipping security for command 3 type 16 9388 TSF:MSG:SEND,1-1-0-0,s=0,c=3,t=16,pt=0,l=0,sg=1,ft=0,st=OK: 9469 Nonce requested from 0. Waiting... 9502 TSF:MSG:READ,0-0-1,s=255,c=3,t=17,pt=6,l=25,sg=1:39A8009337CE6B2429675B3EE9D1FD11A12CB201C27B7AB731 9633 Skipping security for command 3 type 17 9682 Nonce received from 0. 9715 Proceeding with signing... Message to process: 010006000000 Current nonce: 39A8009337CE6B2429675B3EE9D1FD11A12CB201C27B7AB731AAAAAAAAAAAAAA HMAC: 925B0FAED6941FFC943824E7ADBC694D1521C515B5C28BB0445873043CE2A167 Signature in message: 015B0FAED6941FFC943824E7ADBC694D1521C515B5C28BB044 11157 Message signed 11255 Message to send has been signed 11304 TSF:MSG:SEND,1-1-0-0,s=0,c=0,t=0,pt=0,l=0,sg=1,ft=0,st=OK: 11370 MCO:REG:REQ 11403 Skipping security for command 3 type 26 11452 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=26,pt=1,l=1,sg=1,ft=0,st=OK:2 11534 TSF:MSG:READ,0-0-1,s=255,c=3,t=16,pt=0,l=0,sg=1: 11599 Skipping security for command 3 type 16 SHA256: 21F723FE2BC6B783D6180A5D5FD4FA6FEEBC9619DB03AC42F700000000000000 11894 Skipping security for command 3 type 17 12009 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=17,pt=6,l=25,sg=1,ft=0,st=OK:21F723FE2BC6B783D6180A5D5FD4FA6FEEBC9619DB03AC42F7 12156 Transmitted nonce 12173 TSF:MSG:READ,0-0-1,s=255,c=3,t=27,pt=1,l=1,sg=1:1 Signature in message: 01F9F3C6AB0598E633E422941AED25C8326217E59EB80E2D Message to process: 00010E231BFF01 Current nonce: 21F723FE2BC6B783D6180A5D5FD4FA6FEEBC9619DB03AC42F7AAAAAAAAAAAAAA HMAC: 4DB8C02FBF9752C441D02C31E770CC7D7E9559C3F0323EB5E85949DB55479125 Signature bad: 01B8C02FBF9752C441D02C31E770CC7D7E9559C3F0323EB5 13729 Signature verification failed! 13828 !TSF:MSG:SIGN VERIFY FAIL 13860 MCO:BGN:STP 13893 MCO:BGN:INIT OK,TSP=1 13926 MCO:SLP:MS=5,SMS=0,I1=255,M1=255,I2=255,M2=255 13975 MCO:SLP:TPD 14008 MCO:SLP:WUP=-1 14024 Skipping security for command 3 type 16 14090 TSF:MSG:SEND,1-1-0-0,s=0,c=3,t=16,pt=0,l=0,sg=1,ft=0,st=OK: 14155 Nonce requested from 0. Waiting... 14204 TSF:MSG:READ,0-0-1,s=255,c=3,t=17,pt=6,l=25,sg=1:9C129D83097B589C208D1C9C33B1950DC9EE1C258CF7A93E05 14336 Skipping security for command 3 type 17 14385 Nonce received from 0. 14417 Proceeding with signing... Message to process: 01000E21100000 Current nonce: 9C129D83097B589C208D1C9C33B1950DC9EE1C258CF7A93E05AAAAAAAAAAAAAA HMAC: EB1086A4ED61967A799188580A94ED63AF3FA19D416CDFEBD44533337287719C Signature in message: 011086A4ED61967A799188580A94ED63AF3FA19D416CDFEB 15876 Message signed 15958 Message to send has been signed 16007 TSF:MSG:SEND,1-1-0-0,s=0,c=1,t=16,pt=1,l=1,sg=1,ft=0,st=OK:0 16089 Skipping security for command 3 type 16 16138 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=16,pt=0,l=0,sg=1,ft=0,st=OK: 16220 Nonce requested from 0. Waiting... 16269 TSF:MSG:READ,0-0-1,s=255,c=3,t=17,pt=6,l=25,sg=1:387EA66DC5039E8E6868373832492E019E1A5A055A01A69988 16400 Skipping security for command 3 type 17 16449 Nonce received from 0. 16482 Proceeding with signing... Message to process: 01000E2300FF64 Current nonce: 387EA66DC5039E8E6868373832492E019E1A5A055A01A69988AAAAAAAAAAAAAA HMAC: 33644999A7B56076EBC8E6C12C787406C9348F721D1B7AEC56F5430DC1A659CD Signature in message: 01644999A7B56076EBC8E6C12C787406C9348F721D1B7AEC 17924 Message signed 18022 Message to send has been signed 18071 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=0,pt=1,l=1,sg=1,ft=0,st=OK:100 18153 MCO:SLP:MS=0,SMS=0,I1=1,M1=1,I2=255,M2=255 18202 MCO:SLP:TPD -
@Anticimex Yeah of course:
0 MCO:BGN:INIT NODE,CP=RNNNAS-,VER=2.1.1 32 TSM:INIT 49 TSF:WUR:MS=0 81 TSM:INIT:TSP OK 98 TSM:INIT:STATID=1 131 TSF:SID:OK,ID=1 147 TSM:FPAR 163 Will not sign message for destination 255 as it does not require it 278 TSF:MSG:SEND,1-1-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK: 2375 !TSM:FPAR:NO REPLY 2392 TSM:FPAR 2408 Will not sign message for destination 255 as it does not require it 2523 TSF:MSG:SEND,1-1-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK: 4636 !TSM:FPAR:NO REPLY 4653 TSM:FPAR 4669 Will not sign message for destination 255 as it does not require it 4800 TSF:MSG:SEND,1-1-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK: 6897 !TSM:FPAR:NO REPLY 6914 TSM:FPAR 6930 Will not sign message for destination 255 as it does not require it 7045 TSF:MSG:SEND,1-1-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK: 9158 !TSM:FPAR:FAIL 9175 TSM:FAIL:CNT=1 9191 TSM:FAIL:PDTThat's strange, isn't it? I will try it without the request from all flag on the gateway but I thought it would be right to set it if I want signing for all nodes. (At the moment I'm just experimenting with one node.)
@alexanderkind from your last log, I don't see the signing presentation data being exchanged so the node have not yet learned of the gw:s signing preferences.
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@Anticimex Sorry. It was my fault. Now it should be correct. Here is the new debug output:
0 MCO:BGN:INIT NODE,CP=RNNNAS-,VER=2.1.1 32 TSM:INIT 49 TSF:WUR:MS=0 81 TSM:INIT:TSP OK 98 TSM:INIT:STATID=1 131 TSF:SID:OK,ID=1 147 TSM:FPAR 163 Will not sign message for destination 255 as it does not require it 278 TSF:MSG:SEND,1-1-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK: 737 TSF:MSG:READ,0-0-1,s=255,c=3,t=8,pt=1,l=1,sg=1:0 802 Skipping security for command 3 type 8 851 TSF:MSG:FPAR OK,ID=0,D=1 2375 TSM:FPAR:OK 2392 TSM:ID 2408 TSM:ID:OK 2424 TSM:UPL 2441 Skipping security for command 3 type 24 2490 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=OK:1 2572 TSF:MSG:READ,0-0-1,s=255,c=3,t=25,pt=1,l=1,sg=1:1 2637 Skipping security for command 3 type 25 2686 TSF:MSG:PONG RECV,HP=1 2719 TSM:UPL:OK 2736 TSM:READY:ID=1,PAR=0,DIS=1 2768 Signing required 2801 Skipping security for command 3 type 15 2850 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=15,pt=6,l=2,sg=0,ft=0,st=OK:0101 2932 Waiting for GW to send signing preferences... 2998 TSF:MSG:READ,0-0-1,s=255,c=3,t=15,pt=6,l=2,sg=0:0101 3063 Skipping security for command 3 type 15 3112 Mark node 0 as one that require signed messages 3162 Mark node 0 as one that do not require whitelisting 3227 Skipping security for command 3 type 16 3293 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=16,pt=0,l=0,sg=0,ft=0,st=OK: 3358 Nonce requested from 0. Waiting... 3407 TSF:MSG:READ,0-0-1,s=255,c=3,t=17,pt=6,l=25,sg=0:03AC0D8B3CB5CB15A89C1CA0D34A23A3CD126BB074F8B86363 3538 Skipping security for command 3 type 17 3588 Nonce received from 0. 3620 Proceeding with signing... Message to process: 01002E0011FF322E312E31 Current nonce: 03AC0D8B3CB5CB15A89C1CA0D34A23A3CD126BB074F8B86363AAAAAAAAAAAAAA HMAC: 42A3503DBB004E69A9D9F7D28B95840D053FC9392FA07DEEB0F7DF77FDE96F28 Signature in message: 01A3503DBB004E69A9D9F7D28B95840D053FC939 5062 Message signed 5160 Message to send has been signed 5193 TSF:MSG:SEND,1-1-0-0,s=255,c=0,t=17,pt=0,l=5,sg=1,ft=0,st=OK:2.1.1 5292 Skipping security for command 3 type 16 5341 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=16,pt=0,l=0,sg=1,ft=0,st=OK: 5423 Nonce requested from 0. Waiting... 5472 TSF:MSG:READ,0-0-1,s=255,c=3,t=17,pt=6,l=25,sg=1:4C7070935D33A92B30B5C969B2D73AD1528B7715B3DDBCE1A3 5586 Skipping security for command 3 type 17 5636 Nonce received from 0. 5668 Proceeding with signing... Message to process: 01000E2306FF00 Current nonce: 4C7070935D33A92B30B5C969B2D73AD1528B7715B3DDBCE1A3AAAAAAAAAAAAAA HMAC: CB7D06543C6086C9CCB25CF7DB42F0A81613215486A512EDA03238F8E33D3C4D Signature in message: 017D06543C6086C9CCB25CF7DB42F0A81613215486A512ED 7127 Message signed 7208 Message to send has been signed 7258 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=6,pt=1,l=1,sg=1,ft=0,st=OK:0 9338 Skipping security for command 3 type 16 9388 TSF:MSG:SEND,1-1-0-0,s=0,c=3,t=16,pt=0,l=0,sg=1,ft=0,st=OK: 9469 Nonce requested from 0. Waiting... 9502 TSF:MSG:READ,0-0-1,s=255,c=3,t=17,pt=6,l=25,sg=1:39A8009337CE6B2429675B3EE9D1FD11A12CB201C27B7AB731 9633 Skipping security for command 3 type 17 9682 Nonce received from 0. 9715 Proceeding with signing... Message to process: 010006000000 Current nonce: 39A8009337CE6B2429675B3EE9D1FD11A12CB201C27B7AB731AAAAAAAAAAAAAA HMAC: 925B0FAED6941FFC943824E7ADBC694D1521C515B5C28BB0445873043CE2A167 Signature in message: 015B0FAED6941FFC943824E7ADBC694D1521C515B5C28BB044 11157 Message signed 11255 Message to send has been signed 11304 TSF:MSG:SEND,1-1-0-0,s=0,c=0,t=0,pt=0,l=0,sg=1,ft=0,st=OK: 11370 MCO:REG:REQ 11403 Skipping security for command 3 type 26 11452 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=26,pt=1,l=1,sg=1,ft=0,st=OK:2 11534 TSF:MSG:READ,0-0-1,s=255,c=3,t=16,pt=0,l=0,sg=1: 11599 Skipping security for command 3 type 16 SHA256: 21F723FE2BC6B783D6180A5D5FD4FA6FEEBC9619DB03AC42F700000000000000 11894 Skipping security for command 3 type 17 12009 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=17,pt=6,l=25,sg=1,ft=0,st=OK:21F723FE2BC6B783D6180A5D5FD4FA6FEEBC9619DB03AC42F7 12156 Transmitted nonce 12173 TSF:MSG:READ,0-0-1,s=255,c=3,t=27,pt=1,l=1,sg=1:1 Signature in message: 01F9F3C6AB0598E633E422941AED25C8326217E59EB80E2D Message to process: 00010E231BFF01 Current nonce: 21F723FE2BC6B783D6180A5D5FD4FA6FEEBC9619DB03AC42F7AAAAAAAAAAAAAA HMAC: 4DB8C02FBF9752C441D02C31E770CC7D7E9559C3F0323EB5E85949DB55479125 Signature bad: 01B8C02FBF9752C441D02C31E770CC7D7E9559C3F0323EB5 13729 Signature verification failed! 13828 !TSF:MSG:SIGN VERIFY FAIL 13860 MCO:BGN:STP 13893 MCO:BGN:INIT OK,TSP=1 13926 MCO:SLP:MS=5,SMS=0,I1=255,M1=255,I2=255,M2=255 13975 MCO:SLP:TPD 14008 MCO:SLP:WUP=-1 14024 Skipping security for command 3 type 16 14090 TSF:MSG:SEND,1-1-0-0,s=0,c=3,t=16,pt=0,l=0,sg=1,ft=0,st=OK: 14155 Nonce requested from 0. Waiting... 14204 TSF:MSG:READ,0-0-1,s=255,c=3,t=17,pt=6,l=25,sg=1:9C129D83097B589C208D1C9C33B1950DC9EE1C258CF7A93E05 14336 Skipping security for command 3 type 17 14385 Nonce received from 0. 14417 Proceeding with signing... Message to process: 01000E21100000 Current nonce: 9C129D83097B589C208D1C9C33B1950DC9EE1C258CF7A93E05AAAAAAAAAAAAAA HMAC: EB1086A4ED61967A799188580A94ED63AF3FA19D416CDFEBD44533337287719C Signature in message: 011086A4ED61967A799188580A94ED63AF3FA19D416CDFEB 15876 Message signed 15958 Message to send has been signed 16007 TSF:MSG:SEND,1-1-0-0,s=0,c=1,t=16,pt=1,l=1,sg=1,ft=0,st=OK:0 16089 Skipping security for command 3 type 16 16138 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=16,pt=0,l=0,sg=1,ft=0,st=OK: 16220 Nonce requested from 0. Waiting... 16269 TSF:MSG:READ,0-0-1,s=255,c=3,t=17,pt=6,l=25,sg=1:387EA66DC5039E8E6868373832492E019E1A5A055A01A69988 16400 Skipping security for command 3 type 17 16449 Nonce received from 0. 16482 Proceeding with signing... Message to process: 01000E2300FF64 Current nonce: 387EA66DC5039E8E6868373832492E019E1A5A055A01A69988AAAAAAAAAAAAAA HMAC: 33644999A7B56076EBC8E6C12C787406C9348F721D1B7AEC56F5430DC1A659CD Signature in message: 01644999A7B56076EBC8E6C12C787406C9348F721D1B7AEC 17924 Message signed 18022 Message to send has been signed 18071 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=0,pt=1,l=1,sg=1,ft=0,st=OK:100 18153 MCO:SLP:MS=0,SMS=0,I1=1,M1=1,I2=255,M2=255 18202 MCO:SLP:TPD@alexanderkind ok, everything points to that the GW and the node have different hmac keys. Are you absolutely positive that they are identical?
You don't need to post them as proof, just make sure that every single bit is the same :)
The security personalizer can be configured to dump them. Or you can dump eeprom by other means. -
@alexanderkind ok, everything points to that the GW and the node have different hmac keys. Are you absolutely positive that they are identical?
You don't need to post them as proof, just make sure that every single bit is the same :)
The security personalizer can be configured to dump them. Or you can dump eeprom by other means.@Anticimex I will try to dump them with the security personalizer. I already did that earlier. Should be no problem. But I thought they were the same :confused:
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@alexanderkind ok, everything points to that the GW and the node have different hmac keys. Are you absolutely positive that they are identical?
You don't need to post them as proof, just make sure that every single bit is the same :)
The security personalizer can be configured to dump them. Or you can dump eeprom by other means.@Anticimex You're definitely right. For some reason I can't write the key to the eeprom of the ATmega328p. If I upload the sketch and then try to dump the keys, there are only many F's. With the Arduino Nano Gateway everything works fine.
You're great! I would have never thought that it could be such a problem :) But now I have to solve that :joy:
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@Anticimex You're definitely right. For some reason I can't write the key to the eeprom of the ATmega328p. If I upload the sketch and then try to dump the keys, there are only many F's. With the Arduino Nano Gateway everything works fine.
You're great! I would have never thought that it could be such a problem :) But now I have to solve that :joy:
@alexanderkind well, sorry to hear that you have a problem with the eeprom. Glad to be able to help out in troubleshooting it.
Perhaps you have some code on your node that writes to eeprom and happens to write to the wrong place? (only speculating). But now at least you have a reason for the the failed verifications. 👍 -
@alexanderkind well, sorry to hear that you have a problem with the eeprom. Glad to be able to help out in troubleshooting it.
Perhaps you have some code on your node that writes to eeprom and happens to write to the wrong place? (only speculating). But now at least you have a reason for the the failed verifications. 👍@Anticimex I think I will try that tomorrow. And I will set up the node with another Arduino Nano instead of the ATmega standalone to see if that works :+1:
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@alexanderkind well, sorry to hear that you have a problem with the eeprom. Glad to be able to help out in troubleshooting it.
Perhaps you have some code on your node that writes to eeprom and happens to write to the wrong place? (only speculating). But now at least you have a reason for the the failed verifications. 👍@Anticimex I couldn't stop trying to fix the problem :) Now it's working. I had to set different fuses with avrdude because EESAVE wasn't enabled. So every upload with the Arduino IDE cleaned the eeprom :)
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@Anticimex I couldn't stop trying to fix the problem :) Now it's working. I had to set different fuses with avrdude because EESAVE wasn't enabled. So every upload with the Arduino IDE cleaned the eeprom :)
@alexanderkind great that the root cause was found! And now we have a forum thread for others to read in case they have the same problem! Thanks for reporting!
