I need someone who know how control a herkulex servo with my beagle bone in python or c
Typically, servos are controlled by using a PWM signal. cf:
https://stackoverflow.com/questions/50203064/pwm-on-beaglebone-black-v4-14
However, the documentation for this servo
https://www.robotshop.com/media/files/pdf2/_eng_herkulex_manual_20140218.pdf
indicates that this servo uses 115200bps 8n1 TTL level SERIAL communication
-- eg: a UART.
Unfortunately, the diagram on page 51 indicates that "TTL" means
original 5V TTL. 5V will kill a Beagle -- the pins are limited to 3.3V. The
diode/resistor set shown at the top left /might/ imply that the TTL is
using a pull-up circuit -- in which case feeding 3.3V instead of 5V may be
sufficient.
1 Like
Which Herkulex server are you considering to use with the Beaglebone?
Personally, I would not connect anything directly to a GPIO pin on the BB and prefer to use a driver circuit to drive the signals to something like a servo.
There is an Interface Manager for the Herkulex servos so that might be a place to start:
https://www.robotshop.com/en/interface-manager-kit-herkulex-servo.html?gclid=EAIaIQobChMIw6n7n9W87wIVydXACh39EgmfEAQYASABEgJLPvD_BwE
With a quick search I did find this GitHub repo:
https://github.com/robot-mitya/herkulex-servo
Cheers,
Jon
page 17 of the manual that Dennis attached implies that a serial interface module is needed. see the second caution on that page.
There are folks connecting directly to Herkulex Servos with Arduino boards, so I imagine it is possible with a BeagleBone but I would not do it directly to a GPIO pin.
https://wiki.dfrobot.com/Herkulex_DRS-0101_SKU_SER0032
Jon
The easiest solution is to use the usb of beaglebone how already in 5v. And connect an usb ttl https://fr.farnell.com/adafruit-industries/954/usb-to-ttl-serial-cable-raspberry/dp/2215041.
It worked perfectly.
1 Like