![]() ![]() Serial port test in Programming Editor passes voltage to SERIN is -5.55V when LED is off, +5.55V when LED is on.Steady voltage of 4.99V powering the 14M, regulated with a 7805 and a couple of capacitors.Pin 5 (GND) goes to the ground.ĭiagnostics/troubleshooting steps so far: ![]() I have 3 wires soldered to a female DB9 connector for the interface. I searched and found 3 forum threads with the same error, none of which resolved my issue. However, during programming I receive "Serial port error - code 0x1F54 'Error reading comm device'. I purchased this Prolific cable after seeing that most board members recommended it over other 3rd-party cables. I am attempting to program a 14M chip using a Prolific chipset USB to Serial converter, chipset PL2303 (unsure of the manufacturer of the actual cable it was bought from Sparkfun). Picaxe Programming Editor, latest version (v5.2.7) Prolific PL2303 chipset USB to Serial Cable, latest drivers (v1.0.5.18) ![]()
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