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Add HDMI monitor

dritguy

Have the 7" touchscreen display with Raspiberry pi 4. Fixed the upside display. Works great. Wondering if I can add a HDMI monitor. If so, how?

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    You are right. HDMI0 does not work for dual monitor. HDMI1 does. I did have to turn on SPI. However, in the beginning before with only the 7" display, I had to invert the viewing. When I plugged the monitor into HDMI1, the 7" got inverted. I simply figure out to re-invert. That I have overlay where I can move the mouse between screens. Interesting. for now, I will leave it that way so I can continue software development and when done, switched back to the 7" to get the menu back to the screen. Thank you again for the reply. I am glad I picked Element14 to acquire the devices. 

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  • 0

    You are right. HDMI0 does not work for dual monitor. HDMI1 does. I did have to turn on SPI. However, in the beginning before with only the 7" display, I had to invert the viewing. When I plugged the monitor into HDMI1, the 7" got inverted. I simply figure out to re-invert. That I have overlay where I can move the mouse between screens. Interesting. for now, I will leave it that way so I can continue software development and when done, switched back to the 7" to get the menu back to the screen. Thank you again for the reply. I am glad I picked Element14 to acquire the devices. 

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