Setting Up and Using the Adafruit 16-Channel Servo HAT for Raspberry Pi

[f0rml3ssf0rm]

I’m trying to get this working with a pi 4. Works on my pi zero, but not pi 4, here’s the details:

ValueError: No i2c device at address 0x40

Have an Adafruit 16 PWM Servo HAT connected to a Raspberry Pi 4B. I get an error: ValueError: No i2c device at address 0x40 When I try run: import time from adafruit_servokit import ServoKit kit = ServoKit(channels=16) kit.servo[0].angle = 180 kit.servo[4].angle = 20 time.sleep(0.5) kit.servo[4].angle = 0 time.sleep(0.5) kit.servo[0].angle = 0 Just as an fyi, i2cdetect -y 20 and i2cdetect -y 21 display contents, just not i2cdetect -y 1. Is that normal? This exact same code runs perfectly…

Any ideas?