What of Renault or Dacia are you working on?
To help give you the best advice or troubleshooting steps for your specific project, tell me: renolink key card programming
: This is the mandatory USB-to-OBD hardware interface. The red OBDLink SX (USB) or the OBDLink EX are highly recommended for stable data transmission. Avoid cheap clone cables, as they easily corrupt vehicle UCH modules. What of Renault or Dacia are you working on
Complete Guide to Renolink Key Card Programming: Software, Hardware, and Step-by-Step Tutorial and Step-by-Step Tutorial