baxter462
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Okay,
in all my recent tinkering with the CIM's on my MEP-805B generators, I have learned a lot. One of my discoveries is that the keypad literally emulates a serial mouse. You can disconnect the keypad's db9 connector and plug in an old serial mouse instead and use that to move the cursor and make selections on the CIM's screen. This is an easy temporary solution for anyone with a bad keypad. I haven't tried a serial to ps/2 adapter with a ps/2 mouse, but I suspect it would work.
Since the data packets sent from an old mouse via rs232 are so well documented, it will be simple to make a replacement keypad with a few momentary push buttons and an arduino or similar programmable microcontroller. It isn't a high priority to me at the moment, but I will eventually build one and share it with everyone on here. In the meantime, the serial mouse trick should work. This will also make diagnosing a bad keypad much easier.
in all my recent tinkering with the CIM's on my MEP-805B generators, I have learned a lot. One of my discoveries is that the keypad literally emulates a serial mouse. You can disconnect the keypad's db9 connector and plug in an old serial mouse instead and use that to move the cursor and make selections on the CIM's screen. This is an easy temporary solution for anyone with a bad keypad. I haven't tried a serial to ps/2 adapter with a ps/2 mouse, but I suspect it would work.
Since the data packets sent from an old mouse via rs232 are so well documented, it will be simple to make a replacement keypad with a few momentary push buttons and an arduino or similar programmable microcontroller. It isn't a high priority to me at the moment, but I will eventually build one and share it with everyone on here. In the meantime, the serial mouse trick should work. This will also make diagnosing a bad keypad much easier.
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