edgetpu: EdgeTPU PWM output low average voltage problem with Servo motor

We have an MG996R model Servo motor. The PWM output from the Coral is only 2.5V peak, and not very strong. We are using the HC4049 model buffer for this. But this doesn’t work. We couldn’t run our servo motor. Previously we have Raspberry PI 3 Model B and it was working smoothly.

We are following two libraries. First, Adafruit_CircuitPython_Motor And they have explained this situation in this article. https://learn.adafruit.com/circuitpython-on-google-coral-linux-blinka/pwm-outputs-servos We tried the codes in the “Servo Control” section

Second, python-periphery from periphery import PWM pwm = PWM(2, 0) pwm.duty_cycle = 0 pwm.frequency = 5000 pwm.duty_cycle = 0.98 pwm.frequency = 5500

We didn’t get errors in both libraries but nothing happened. Some people have this problem but there is no solution. https://stackoverflow.com/questions/55385943/google-edgetpu-cant-get-pwm-to-work-with-python

References.

Linux arid-goose 4.9.51-imx #1 SMP PREEMPT Thu Jan 31 01:58:26 UTC 2019 aarch64 GNU/Linux

mendel@jumbo-zebra:~$ cat /etc/os-release PRETTY_NAME=“Mendel GNU/Linux 4 (Day)” NAME=“Mendel GNU/Linux” ID=mendel ID_LIKE=debian HOME_URL=“https://coral.withgoogle.com/” SUPPORT_URL=“https://coral.withgoogle.com/” BUG_REPORT_URL=“https://coral.withgoogle.com/” VERSION_CODENAME=“day”

Do you have an idea to increase the power of the PWM output? Thanks.