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New Project wp34s micro usb flash cable revisited
02-08-2015, 06:59 AM
Post: #20
RE: New Project wp34s micro usb flash cable revisited
(02-04-2015 08:40 AM)MarkHaysHarris777 Wrote:  So, the ultimate simple and reliable wp34s flash|update cable is going to start here:

[Image: FTDI_PL2303HX.png]

This photo shows the power line moved from the 5.1v to the 3.4v source, for powering the wp34s. The next step is to install the crossover resistors (miniature 1k), then seal the plug.
If you have opened the converter already, you might check if the RTS/CTS pins (and in case of the FT232RL or PT2303HX also the DTR/DSR/DCD pins) are connected with each other or not. If they are still open (that is, not connected to anything else), you could short them. With this patch in place, it is no longer necessary to disable hardware handshake when opening serial connections through USB - it will work both ways. While this isn't normally a problem when using dedicated software it'll make things easier when setting up a connection in a terminal program.

BTW. Based on a photo of Harald's USB board, he didn't connect RTS and CTS as well, so this patch also applies to his board.

Greetings,

Matthias

PS. Where do the 5.1V and 3.4V figures come from? Shouldn't this read 5.0V and 3.3V?


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RE: New Project wp34s micro usb flash cable revisited - matthiaspaul - 02-08-2015 06:59 AM



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