free_sparrow
Posts: 2
Joined: Wed Aug 07, 2019 1:36 pm

Stacking HATs problem with PWM HAT

Thu Aug 08, 2019 8:26 am

I’m trying to run both, an Adafruit 16-channel PWM servo-hat and a RPi-Sense HAT running together stacked. I’ve tried both directions to stack them, Sense-Hat first and servo-hat first. While the servo-hat runs always and is recognised at boot, the Sense-Hat only works alone. From what I've found yet, it seems to be the EEPROM problem but I'm not sure if this is solvable. The Adafruit PWM has also a EEPROM but they are stackable, is it possible to change the EEPROM address?
The picture shows the status after booting. The Pi works, so does the PWM, only the Sense-Hat doesn't and the LEDs light permanently, the same situation when I booted with only the Sense-HAT and using the wrong WiFi driver for an USB wifi dongle.
Thanks in advance for any input!

Image

free_sparrow
Posts: 2
Joined: Wed Aug 07, 2019 1:36 pm

Re: Stacking HATs problem with PWM HAT

Fri Aug 09, 2019 7:56 am

I've solved this now!

I've added

dtoverlay=rpi-sense to /boot/config.txt

and rebooted.
Both HATs now working together!

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