Search found 3 matches

by bobkoytc
Tue Apr 20, 2021 11:42 am
Forum: Display
Topic: 2004 20x4 I2C Serial LCD Module (HCMODU0010)
Replies: 54
Views: 102517

Re: 2004 20x4 I2C Serial LCD Module (HCMODU0010)

I've now checked the packaging and yes there's a little jumper in there!
Must have come off in transit.
The two pins are marked LED so I thought you must be able to connect some sort of LED to it. I've found no instructions to say what it was for.
Thanks for you help. All working nicely now.
by bobkoytc
Sun Apr 18, 2021 3:49 pm
Forum: Display
Topic: 2004 20x4 I2C Serial LCD Module (HCMODU0010)
Replies: 54
Views: 102517

Re: 2004 20x4 I2C Serial LCD Module (HCMODU0010)

I should have persevered a bit longer before making my previous post, above.
I have the backlight working now.
I had to short together two two pins on the rear of the module.
by bobkoytc
Sun Apr 18, 2021 2:40 pm
Forum: Display
Topic: 2004 20x4 I2C Serial LCD Module (HCMODU0010)
Replies: 54
Views: 102517

Re: 2004 20x4 I2C Serial LCD Module (HCMODU0010)

Display works nicely, once I'd figured out the I2C address. The instructions in the first post say "If there a 3 sets of pads labelled A0, A1, & A2 then the default address will be 0x3F. If there are no pads the default address will be 0x27." My board has no pads but the address is 0x3F. The remaini...

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