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| Happy new year and succes |
| Happy new year and success |
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- I had similar problems on a BMW M30 turbo car with MSD dual coil ignition. Communication usually breaks when higher RPM and/or engine load occurs. I've used a long RS-232 cable to put the USB/RS232 converter electronics far away from high currents which helped somewhat but didn't cure the problem completely.
Also check (and disable) the notebook's harddrive shock protection system if it has any. (GergelyLezsak) |
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* I had similar problems on a BMW M30 turbo car with MSD dual coil ignition. Communication usually breaks when higher RPM and/or engine load occurs. I've used a long RS-232 cable to put the USB/RS232 converter electronics far away from high currents which helped somewhat but didn't cure the problem completely.
* Also check (and disable) the notebook's harddrive shock protection system if it has any. (GergelyLezsak) * try to run the notebook from battery (notebook not grounded to car-chassis, only via the RS232 DSUB9/pin5: the USB-RS232 cable and windows driver combination is usually less problematic this way) ** and from cigar-lighter supply (notebook grounded to chassis via supply and RS232: this is usually more problematic, but sometimes better) * VemsTune supports TCP communication, so dependable parts can be used instead of the problematic direct USB-serial + windows driver. ** we are testing new wifi-serial and bluetooth-serial small modules (for wifi, big routers also work: OverTCPWireless but newer, small lightweight modules seem to work well too - unfortunately the prototype batch we manufactured was small, need to manufacture a bigger batch now). |