By Abhijith V M , 23 August, 2022 Forums General discussion hi, when trying to read from Landis gyr e550 using python shows data send failed error command used python3 main.py -S /dev/ttyS2 -i output get gurux dlms version: 1.0.131 gurux net version: 1.0.19 gurux serial version: 1.0.20 Authentication: Authentication.NONE ClientAddress: 0x10 ServerAddress: 0x1 Standard: Standard. DLMS Unknown object : 10630 0.0.240.5.7.255 Unknown object: 10630 0.0.240.5.8.255 Unknown object: 10630 0.0.240.5.11.255 Unknown object: 10630 0.0.240.5.12.255 Unknown object: 10026 1.2.82.8.0.255 Unknown object: 10026 1.3.82.8.0.255 Unknown object: 10025 0.1.96.3.4.255 Unknown object: 10010 0.0.240.14.0.255 Unknown object: 10010 0.0.240.14.16.255 Unknown object: 10010 0.0.240.14.32.255 Unknown object: 10010 0.0.240.14.33.255 Unknown object: 10010 0.0.240.14.34.255 Unknown object: 10010 0.0.240.14.35.255 Unknown object: 10010 0.0.240.14.36.255 Unknown object: 10610 0.0.240.33.255.255 ............... .................... .......................... FX: 06:41:44 a er 21 03 90 20 3 86 87 00 C4 03 C1 0A 00 02 02 0F 00 16 FF 00 02 02 0F 00 16 FF 00 02 86 87 00 C4 03 C1 0A 00 02 02 OF FF 16 15 00 02 02 OF FT 16 20 00 02 02 0F 00 16 Data send failed. Try to resend 1/3 Data send failed. Try to resend 2/3 Data send failed. Try to send 1/3 FX: 06:41:59 Data send failed. Try to resend 1/3 Data send failed. Try to resend 2/3 Data send failed. Try to send 1/3 ....... ....... only getting these outputs